First Revision No. 1-NFPA 79-2016 [ Global Input ] · PDF fileIEC 60072–2, Dimensions...

First Revision No. 1-NFPA 79-2016 [ Global Input ]

Subpanel in parenthesis was the only new material added to this definition.

3.3.94 Subplate (Subpanel)

Submitter Information Verification

Submitter Full Name: Mark Cloutier

Organization: [ Not Specified ]

Street Address:

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Submittal Date: Mon Feb 29 17:09:46 EST 2016

Committee Statement

CommitteeStatement:

The term "subpanel" is used only once in the definition of "Industrial Control Panel." Adding theterm "subpanel" in parenthesis to the definition of subplate provides correlation with the use of theterm "subpanel" in the definition of "industrial Control Panel". The term "sub-panel" is used onlyonce in Annex D and does not require any revision as it is used in an example of a bill of materialsentry. The term sub-plate was not found in the standard.

ResponseMessage:

Public Input No. 93-NFPA 79-2015 [Global Input]

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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DELETE ALL OCCURANCES OF IEEE 315A IN THE STANDARD




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Submittal Date: Tue Mar 01 14:32:42 EST 2016

Committee Statement

CommitteeStatement:

IEEE 315A has been superseded by IEEE 315. There are approximately 6 locations where315A is used.

Response Message:


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16.2.3.1 The marking shall be located so as to be clearly plainly visible to qualified persons beforeexamination, adjustment, servicing, or maintenance of the equipment.




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Committee Statement

CommitteeStatement:

The only instance of “clearly visible” in the standard occurs in 16.2.3.1. Changing “clearly visible”to “plainly visible” in this clause facilitates consistent use of the term “plainly visible” in thestandard.

ResponseMessage:

Public Input No. 94-NFPA 79-2015 [Global Input]


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First Revision No. 3-NFPA 79-2016 [ Section No. 1.1.1 ]

1.1.1

The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems ofindustrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing atthe point of connection of the supply circuit conductors to the electrical equipment of the machine.




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Committee Statement

CommitteeStatement:

The proposed change aligns with the change in the 2014 NEC where the voltage range for lowvoltage equipment has been increased to 1000V. Also a TG needs to be formed to review all otherlocations in the document where 600 V limit appears.and determine if a revision is required.

Sections that contain reference to 600 volts are 1.1.1, 3.3.106, 7.2.10.2, 7.9 11.5 and Table11.5.1.1.

ResponseMessage:

Public Input No. 108-NFPA 79-2016 [Section No. 1.1.1]



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First Revision No. 4-NFPA 79-2016 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this standard and shall beconsidered part of the requirements of this document.

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 70®, National Electrical Code®, 2014 2017 edition.

NFPA 70E®, Standard for Electrical Safety in the Workplace®, 2015 edition.

2.3 Other Publications.

2.3.1 ANSI Publications.

American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.

ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .

2.3.2 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ASTM B 8 B8 , Standard Specification for Concentric-Lay–Stranded Copper Conductors, Hard,Medium-Hard, or Soft, 2004 2011 .

ASTM B 174 B174 , Standard Specification for Bunch-Stranded Copper Conductors for ElectricalConductors, 2002 2010, reapproved 2015 .

ASTM B 286 B286 , Standard Specification for Copper Conductors for Use in Hookup Wire for ElectronicEquipment, 2002 2007, reapproved 2012 .

2.3.3 IEC Publications.

International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,Switzerland.

IEC 60072–1, Dimensions and output series for rotating electrical machines — Part 1: Frame numbers 56to 400 and flange numbers 55 to 1080, 1991-03 .

IEC 60072–2, Dimensions and output series for rotating electrical machines — Part 2: Frame numbers355 to 1000 and flange numbers 1180 to 2360, 1990-12 .

Global FR-16

2.3.4 IEEE Publications.

IEEE, Three 3 Park Avenue, 17th Floor, New York, NY 10016-5997.

IEEE 315 /315A , Graphical Symbols for Electrical and Electronics Diagrams (Including ReferenceDesignation Letters), 1993.

2.3.5 NEMA Publications.

National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , Rosslyn Arlington ,VA 22209.

NEMA ICS 2, Industrial Control and Systems: Controllers, Contactors, and Overload Relays Rated600 Volts, 2000, Revised 2004 errata 2008 .

NEMA MG-1, Motors and Generators, 2003 2014 .

NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .


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2.3.6 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

ANSI/UL 50 UL50 , Standard for Enclosures for Electrical Equipment, 2007, revised 2012 .

ANSI/UL 50E UL50E , Standard for Electrical Equipment, Environment Considerations, 2007, revised2012 .

ANSI/UL 508 UL508 , Standard for Industrial Control Equipment, 1999, revised 2010 2013 .

UL 508A UL508A , Standard for Industrial Control Panels, 2001, revised 2010 2014 .

ANSI/UL 870 UL870 , Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, revised2013 .

ANSI/UL 1063 UL1063 , Standard for Machine-Tool Wires and Cables, 2006, revised 2012 .

ANSI/UL 1581 UL1581 , Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001,revised 2011 2015 .

2.3.7 U.S. Government Publications.

U.S. Government Printing Publishing Office, 732 North Capitol Street, NW, Washington, DC20402 20401-0001 .

Title 29, Code of Federal Regulations, Part 1910.331–335, “Safety-Related Work Practices.”

2.3.8 Other Publications.

Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003.

2.4 References for Extracts in Mandatory Sections.






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Committee Statement

Committee Statement: Referenced current SDO names, addresses, standard names, numbers, and editions.

Response Message:

Public Input No. 1-NFPA 79-2015 [Chapter 2]


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First Revision No. 19-NFPA 79-2016 [ New Section after 3.3.5 ]

3.3.6 Adjustable Speed Drive System.

A combination of an adjustable speed drive, its associated motor(s), and auxiliary equipment. [ 70: 100]




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Committee Statement

CommitteeStatement:

The definition of "adjustable speed drive system" in the 2014 NEC is added as a new sectionin Chapter 3 as this term is being added to Chapter 4.

ResponseMessage:


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3.3.5* Adjustable Speed Drive.

A combination of the power converter, motor, and motor mounted auxiliary devices such as encoders,tachometers, thermal switches and detectors, air blowers, heaters, and vibration sensors. Powerconversion equipment that provides a means of adjusting the speed of an electric motor. [ 70: 100]

Supplemental Information

File Name Description

FR-18_A.3.3.5.docx




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Committee Statement

CommitteeStatement:

The definition of "adjustable speed drive" is revised to correlate with the definition in the 2014 NEC.The annex material for A.3.3.5 is revised to add the text of the Informational Note to the definition of"adjustable speed drive" in the 2014 NEC at the end of the existing text of A.3.3.5. The definition of"adjustable speed drive system" in the 2014 NEC is added as a new section in Chapter 3 as thisterm is being added to Chapter 4.

ResponseMessage:



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FR‐18, New annex material

A.3.3.5 Adjustable Speed Drive.

A variable frequency drive is one type of electronic adjustable speed drive that controls the rotational

speed of an ac electric motor by controlling the frequency and voltage of the electrical power supplied

to the motor. [70:100]

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3.3.11* Basic Protection (Protection From Direct Contact).

Protection against electric shock under fault-free conditions.



FR-20_A.3.3.xx_Basic_Protection.docx




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Committee Statement

CommitteeStatement:

The committee accepts the new definition of “basic protection” but adds the term “protection fromdirect contact” in parenthesis for historical reference for one revision cycle for a betterunderstanding of the terms. The committee also accepts the new annex note.

ResponseMessage:

Public Input No. 104-NFPA 79-2016 [New Section after 3.3.8]

Public Input No. 105-NFPA 79-2016 [New Section after A.3.3.8]


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FR-20, New annex material. A.3.xx Basic Protection (protection from direct contact).

In previous editions of NFPA 79 the term "protection against direct contact" was used in place of "basic protection."

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First Revision No. 6-NFPA 79-2016 [ Section No. 3.3.19.4 ]

3.3.21.4* Liquidtight Flexible Nonmetallic Conduit (LFNC).

A raceway of circular cross section of various types as follows: (1) A smooth seamless inner core andcover bonded together and having one or more reinforcement layers between the core and covers,designated as Type LFNC-A; (2) A smooth inner surface with integral reinforcement within the racewaywall, designated as Type LFNC-B; (3) A corrugated internal and external surface without integralreinforcement within the conduit raceway wall, designated as LFNC-C. [ 70: 356.2]




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Committee Statement

Committee Statement: Revised this definition as recommended to correlate with the definition in the 2014 NEC.

Response Message:

Public Input No. 193-NFPA 79-2016 [Section No. 3.3.19.4]


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3.3.35 Effective Ground-Fault Current Path.

An intentionally constructed, low-impedance electrically conductive path designed and intended to carrycurrent under ground-fault conditions from the point of a ground fault on a wiring system to the electricalsupply source and that facilitates the operation of the overcurrent protective device or ground-faultdetectors. [ 70: 100]




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Submittal Date: Thu Mar 03 16:27:15 EST 2016

Committee Statement

CommitteeStatement:

This term was added in Chapter 8 and adding the definition will help users understand theterm.

Response Message:



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3.3.46* Fault Protection (Protection From Indirect Contact).

Protection against electric shock under single-fault conditions.



FR-23_A.3.3.yy_Fault_Protection.docx




Street Address:

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Committee Statement

CommitteeStatement:

The committee accepts the new definition of the term “fault protection” but adds the term“protection from indirect contact” for historical reference for one revision cycle for a betterunderstanding of the terms. The committee also accepts the new annex note.

ResponseMessage:


Public Input No. 106-NFPA 79-2016 [New Section after A.3.3.42]


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A.3.yy Fault Protection (protection from indirect contact).

In previous editions of NFPA 79 the term "protection against indirect contact" was used in place of "fault protection".

Page 15 of 114


3.3.68.2 Wet Location.

Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locationssubject to saturation with water or other liquids, such as vehicle washing areas; and in unprotectedlocations exposed to weather. [70:100]




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Committee Statement

CommitteeStatement:

Revise this definition of "wet location" by removing the word "and" and retain the definition of"dry location" as recommended to correlate with the definitions in the 2014 NEC.

ResponseMessage:

Public Input No. 195-NFPA 79-2016 [Sections 3.3.64.2, 3.3.64.2]


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3.3.110 Visible, Plainly.

Able to be seen without the movement or unmounting of surrounding equipment.




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Committee Statement

CommitteeStatement:

The term “plainly visible” is used throughout the standard and its definition will assist inproviding accurate interpretations and applications of requirements involving the use of this term.

ResponseMessage:


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First Revision No. 13-NFPA 79-2016 [ Chapter 4 [Title Only] ]

General Requirements and Operating Conditions




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Committee Statement

Committee Statement: The revised title more accurately reflects the material covered in Chapter 4.

Response Message:

Public Input No. 109-NFPA 79-2016 [Chapter 4 [Title Only]]


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First Revision No. 17-NFPA 79-2016 [ New Section after 4.3.2.7 ]

4.3.2.8 Circuits Supplied From Power Conversion Equipment.

Electrical conductors and equipment supplied by power conversion equipment as part of adjustablespeed drive systems and servo drive systems shall be selected based on the electrical powercharacteristics involved and the equipment manufacturer’s instructions.




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Committee Statement

CommitteeStatement:

The switching in the output circuits of power conversion equipment can create electrical powercharacteristics and abnormalities such as recurring voltage peaks (reflected wave), common modenoise, and frequency effects. These can adversely affect electrical equipment that is not intended tooperate under these conditions. Specific mitigation methods can be recommended by themanufacturer. The proposed text ensures proper consideration for equipment selection andapplication in these circuits.

ResponseMessage:


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4.4.2* Electromagnetic Compatibility (EMC).

Transient suppression, isolation, or other appropriate means shall be provided where the equipment of anindustrial machine generates electrical noise or transients, which can affect the operation of equipment.




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Committee Statement

CommitteeStatement:

The proposed revision restricts the requirement for inclusion of noise suppression techniques toonly prevent adverse conditions to the machine producing or receiving the noise itself. The effectson other equipment within the surrounding area must be considered but the machine is not requiredto have noise suppression for other such equipment.

ResponseMessage:



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First Revision No. 15-NFPA 79-2016 [ Section No. 4.8 ]

4.8 Available Fault Current.

The available fault current at the point of the supply to the each industrial control panel of a machine shallnot be greater than the short-circuit current rating marked on the industrial control panel nameplate.




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Committee Statement

CommitteeStatement:

The revised text provides clarification for machines with more than one source of supply and/orcontrol panels. The committee agrees with the submitted substantiation as it is current practicewhere more than one source of supply is present.

ResponseMessage:

Public Input No. 101-NFPA 79-2016 [Section No. 4.8]


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Incoming Supply Circuit Conductor Terminations and Devices for Disconnecting and RemovingPower Means




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Committee Statement

CommitteeStatement:

The title of Chapter 5 is excessively long and does not very well describe the Chapter. The termsupply circuit includes the concept of being "incoming" and the term "disconnecting means"includes the concept of "removing power".

ResponseMessage:



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5.3 Supply Circuit Disconnecting (Isolating) Means.

5.3.1 General.

The following general requirements apply to 5.3.2 through 5.3.5.

5.3.1.1

A supply circuit disconnecting means shall be provided for the following:

(1) Each incoming supply circuit connecting to a machine

(2) The Each supply circuit connecting to a feeder system using collector wires, collector bars, slip-ringassemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines

(3) Each on-board power source (e.g., generators, uninterruptible power supplies)

Exception: Communication, remote control, and signaling circuits of less than 50 volts shall not berequired to be provided with a supply circuit disconnecting means.

5.3.1.1.1*

Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment itdisconnects.

5.3.1.1.2

A main disconnecting means shall be marked as main if multiple disconnecting means are supplied fromthe main disconnecting means.

5.3.1.1.3

Where a machine is supplied by more than one supply circuit, a marking shall be installed at each supplycircuit disconnect location denoting the location of all other supply circuit disconnects.

5.3.1.2

The supply circuit disconnecting means shall disconnect (isolate) the electrical equipment of the machine,including all control circuits, from the supply circuit when required (e.g., for work on the machine, includingthe electrical equipment). Circuits that are not required to be disconnected by the supply circuitdisconnecting means shall comply with 5.3.5.


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5.3.1.3

Each supply circuit disconnecting means other than attachment plugs and receptacles shall be mountedwithin the control enclosure or immediately adjacent thereto.

Exception No. 1: Externally mounted supply circuit disconnecting means, whether interlocked or notinterlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to bemounted up to 6 m (20 ft) away from the control enclosure, provided the control enclosure is marked toindicate the location of the disconnecting means is in sight from and readily accessible to theoperator. the disconnecting means complies with all the following:

(1) Is in sight of the control enclosure it supplies

(2) Is readily accessible

(3) Is marked in accordance with 5.3.1.1.1

Exception No. 2: A supply circuit disconnecting means mounted in a separate enclosure and interlockedin accordance with 6.2.3.1 6.2.4 with the control enclosure(s) it supplies shall be permitted to bemounted up to 6 m (20 ft) away, provided the disconnecting means is in sight from the controlenclosure(s) and readily accessible to the operator. The , provided the control enclosure(s) shall be ismarked indicating to indicate the location of the disconnecting means. The and the disconnectingmeans shall be marked indicating complies with all the industrial machine it supplies. following:

(1) Is in sight of the control enclosure it supplies

(2) Is readily accessible

(3) Is marked in accordance with 5.3.1.1.1

5.3.1.4

Each supply circuit disconnecting means mounted within or adjacent to the control enclosure shall beinterlocked with the control enclosure in accordance with 6.2.3.1 6.2.4 .

Exception: An interlock within the control enclosure shall not be required where the use of a key or toolis required for opening the supply circuit disconnecting means enclosure to access exposed live parts.A safety sign shall be provided in accordance with Section 16.2 .

Exception: Where a supply circuit disconnecting means, supplying machines totaling 2 hp or less is notlocated within or adjacent to the control enclosure it supplies, the control enclosure shall comply with6.2.3.1 6.2.4 or 6.2.3.2 6.2.5 . Where a supply disconnecting means is an attachment plug andreceptacle, the control enclosure it supplies shall comply with 6.2.3.2 6.2.5 . Where compliancewith 6.2.3.2 6.2.5 is used required , a safety sign shall be provided in accordance with Section 16.2.

5.3.1.5

Where two or more disconnecting means are provided within the control enclosure for multiple supplycircuits, they shall be grouped in one location where practicable. Protective interlocks for their correctoperation shall be provided where a hazardous condition or damage to the machine or to the work inprogress can occur.

5.3.2 Type.

The supply circuit disconnecting device shall be one of the following types:

(1) A listed motor circuit switch (switch disconnector) rated in horsepower

(2) A listed molded case circuit breaker

(3) A listed molded case switch

(4) An instantaneous trip circuit breaker that is part of a listed combination motor controller limited tosingle motor applications

(5) A listed self-protected combination controller limited to single motor applications

(6) An attachment plug and receptacle (plug/socket combination) for cord connection

5.3.3 Requirements.


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5.3.3.1*

Where the supply circuit disconnecting device is one of the types in 5.3.2(1) through 5.3.2(5) , the deviceshall fulfill all of the following requirements:

(1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed)position only. Circuit breakers, instantaneous trip circuit breakers, molded-case switches, andself-protected combination motor controllers are permitted to have a reset (tripped) position betweenoff (open) and on (closed).

(2) Have an external operating means (e.g., handle) that complies with 5.3.4.

Exception: Power-operated switchgear need not be operable from outside the enclosure wherethere are other means to open it.

(3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., bypadlocks), independent of the door or cover position. When so locked, , that also prevents remoteas well as local closing shall be prevented into the (on) position .

(4) Simultaneously disconnect all ungrounded conductors of the power supply circuit.

(5) Be operable, by qualified persons, independent of the door or cover position without the use ofaccessory tools or devices.

(6) Be rated for the application as follows:

(a) The With an ampere rating shall be at least 115 percent of the sum of the full-load currentsrequired for all equipment that is in operation at the same time under normal conditions of use.

(b) Where rated in horsepower, the with a horsepower rating shall be at least equal to that which isdefined by Table 430.251(B) of NFPA 70, for a locked rotor current equal to the largest sumresulting from the locked rotor currents of any combination of motors that can be startedsimultaneously and the full-load currents of the remaining motor and non-motor loads that canbe operated at that time.

(c) The With a voltage rating shall be at least equal to the nominal supply circuit voltage.

(7) The disconnecting means shall Be of a type that plainly indicate indicates whether it is in the off( open(off ) or on ( closed) position.

5.3.3.2*

When the supply circuit disconnecting device is an attachment plug and receptacle (plug/socketcombination), it shall fulfill all of the following requirements:

(1) Have a load-break rating or be interlocked with a switching device that is load-break rated andcomplies with 5.3.3.1(6). An attachment plug and receptacle (plug/socket combination) rated greaterthan 20 amperes or 2 hp shall be listed as a switch-rated plug and receptacle (plug/socketcombination).

(2) Be listed as a switch-rated plug and receptacle (plug/socket combination) rated greater than 20amperes or 2 hp

(3) Be of such a type and be so installed as to prevent unintended contact with live parts at any time,even during insertion or removal of the connectors.

(4) Have a first-make, last-break electrical grounding contact.

(5) Have a retaining means to prevent unintended or accidental disconnection where rated at more than20 amperes.

(6) Be located within sight from the operator station and be readily accessible.

5.3.3.3

In addition to the requirements in 5.3.3.2, an additional switching device on the machine shall be providedfor routine power switching operations of the machine on and off.

5.3.4 Operating Handle.


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5.3.4.1

The center of the grip of the operating handle of the disconnecting means, when in its highest position,shall be not more than 2.0 m (6 ft 7 in.) above the servicing level. A permanent operating platform, readilyaccessible by means of a permanent stair or ladder, shall be considered the servicing level for thepurpose of this requirement.

5.3.4.2

An operating handle of the disconnecting means required by 5.3.3.1 shall meet the following criteria:

(1) Be readily accessible with doors in the open or closed position

(2) Maintain the environmental rating of the enclosure to the degree necessary for the application wheninstalled through the control enclosure

(3) Not be restricted by the enclosure door when the door is in the open position

5.3.5 Excepted Circuits.

5.3.5.1

The following circuits shall not be required to be disconnected by the main supply circuit disconnectingmeans:

(1) Lighting circuits for lighting needed during maintenance or repair

(2) Attachment plugs and receptacles (plug and socket outlets) for the exclusive connection of repair ormaintenance tools and equipment (e.g., hand drills, test equipment)

(3) Undervoltage protection circuits that are only used for automatic tripping in the event of supply circuitfailure

(4) Circuits supplying equipment that are required to remain energized for satisfactory operation [e.g.,temperature-controlled measuring devices, product (work in progress) heaters, program storagedevices] , inputs, non-motion outputs, and displays]

5.3.5.2

The supply circuits for excepted circuits shall be provided with all of the following:

(1) A disconnecting means, isolating transformer, and overcurrent protection mounted in an enclosureadjacent to the main control enclosure or within the control enclosure, adjacent to the main supplycircuit disconnecting means.

(2) Line side (of the supply circuit disconnect) supply circuit conductors, when internal to the controlenclosure, that are separate from and do not share a raceway with other conductors and that areencased in rigid or flexible conduit if longer than 460 mm (18 in.)

5.3.5.3

The control interlocking circuits shall be capable of being disconnected at the control panel from whichthey are sourced.

5.3.5.4

Where the excepted circuits are not disconnected by the supply circuit disconnecting means, all of thefollowing requirements shall be met:

(1) Permanent safety sign(s), shall be placed adjacent to the supply circuit disconnecting operatinghandle(s), indicating that it does not de-energize all exposed live parts when it is in the open (off)(isolated) position as in 16.2.4.

(2) A statement containing the information from 16.2.4 shall be included in the machine documentation.

(3) A permanent safety sign shall be placed on a nonremovable part inside the control enclosure inproximity to each excepted circuit, or shall be identified by color as defined in 13.2.4.




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Street Address:

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Committee Statement

CommitteeStatement:

The terms “incoming” and “supply” are redundant. “Supply” is the more common of the two and ismaintained for consistency with the remainder of the standard.

5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multipledisconnecting means it needs to be marked to describe its purpose to differentiate it from the otherdisconnecting means, so that it can be operated to de-energize all supply conductors. The additionalrequirement would apply only if a single main is provided and only adds a marking requirement. Thelanguage in Annex A indicates that it is necessary but that is not enforceable.

5.3.1.3 reformatted for readability. The reference to the disconnect to be readily accessible to theoperator in Exception No. 1 has been removed because the operator has access to an emergencystop and operating the disconnect during normal operation could create a safety concern.

5.3.1.4 New exception is added that provides another option that meets an equivalent control as theexisting requirement.

Language added to 5.3.2 (4) to correlate with (5).

Language added to 5.3.3.1 (1) to correlate with 5.3.2 and because the generic term “circuit breaker”implies inverse time and some users have taken this to mean that instantaneous trip circuit breakersare not included.

5.3.5.1 Item (4) is revised to correlate with other rules such as the exception to 9.1.1.4.

5.3.3.1 Stating that the disconnect must be interlocked with the door limits the requirement toenclosures utilizing doors. New technology equipment is utilizing removable covers (not hingeddoors) so clarifying this requirement includes both doors and covers improves the intended safetyafforded by this required interlocking.

ResponseMessage:



Public Input No. 134-NFPA 79-2016 [Section No. 5.3.1.1.1]



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First Revision No. 28-NFPA 79-2016 [ Chapter 6 ]

Chapter 6 Protection from Electrical Hazards

6.1* General.

Electrical equipment shall provide basic protection of (see Sections 6.2 and 6.4 ) and fault protection(see Sections 6.3 and 6.4 ) to persons from electric shock, from direct and indirect contact, and warnof potential arc-flash hazards .

6.2 Basic Protection Against Direct Contact .

Live parts operating at 50 volts rms ac or 60 volts dc or more shall be guarded against contact.

6.2.1 General.

The basic protection (see 3.3.11 ) requirements of 6.2.2 or 6.2.3 shall be applied to live partsoperating at 50 volts rms ac or 60 volts dc or more.

6.2.2 Protection by Insulation of Live Parts.

Live parts protected by insulation shall be completely covered with insulation that can only be removedby destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical,and thermal stresses to which the insulation is subjected under normal operating conditions. Paints,varnishes, lacquers, and similar products shall not be considered protection against electric shock undernormal operating conditions.

6.2.2.1

Live parts protected by insulation shall be completely covered with insulation that can only be removed bydestruction.

6.2.2.2

Such insulation as described in 6.2.2.1 shall be capable of withstanding the mechanical, chemical,electrical, and thermal stresses to which the insulation is subjected under normal operating conditions.

6.2.2.3

Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shockunder normal operating conditions.

6.2.3 Protection by Enclosures.


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Equipment enclosures and enclosure openings shall meet the requirements of ANSI/ UL 508, UL 508A,ANSI/ UL 50, or NEMA 250. (See Figure 6.2.3.)

Figure 6.2.3 Jointed Test Finger.

Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure asprotection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3.The test finger shall be applied, with only minimal force, in every opening in the enclosure after removalof all parts of the enclosure that are capable of being removed without the use of a tool. The test fingershall not encounter live parts in any direction.

6.2.3.1 Enclosure Interlocking.

When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosurethat contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically orelectrically interlocked, or both, with the control enclosure doors so that none of the doors open unless thepower is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within controlenclosures shall not be required to be interlocked with the control enclosure. A safety sign shall beprovided that meets the requirements of 16.2.4.

Exception No. 2: A disconnecting means used for power supply circuits within control enclosures tomemory elements and their support logic requiring power at all times to maintain information storageshall not be required to be interlocked with the control enclosure doors. A safety sign shall be providedthat meets the requirements of 16.2.4.

6.2.3.1.1*

Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gainaccess without removing power.

6.2.3.1.2

The interlocking means shall meet the following requirements:

(1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons todefeat the interlock

(2) Be reactivated automatically when the door(s) is closed

(3) Prevent closing of the disconnecting means while the door of the enclosure containing thedisconnect is open, unless an interlock is operated by deliberate action

6.2.3.1.3

Where provided with a defeat mechanism as permitted in 6.2.3.1.2(1) , live parts mounted on the inside ofdoors that are operating at over 50 volts shall be protected from unintentional direct contact by theinherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) spherecannot contact any of the live parts in question.


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6.2.3.2 Enclosure Access.

When a qualified person, using appropriate work practices, needs to enter an enclosure that does nothave a disconnect, one of the following conditions shall be met:

(1) The use of a key or tool shall be required for opening the enclosure.

(2) An enclosure door shall be permitted to be opened without the use of a key or a tool and withoutdisconnection of live parts only when all live parts inside are separately enclosed or guarded suchthat there cannot be any direct contact with live parts.

6.2.4 Direct Contact from Outside an Enclosure.

6.3 Fault Protection Against Electric Shock from Indirect Contact (Fault Conditions) .

6.3.1* General.

Protection against indirect contact Fault protection (see 3.3.46) is intended to preventing hazardousconditions to continue in the event of a fault condition (e.g., an insulation failure fault between live andexposed conductive parts shall be provided ) .

6.3.1.1 Protection Against Indirect Contact.

Protection against indirect contact shall be achieved by the following For each circuit part or part of theelectrical equipment, at least one of the following measures shall be applied :

(1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation(see 6.3.2), or

(2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductorsaffected by the automatic operation of a protective device in case of a fault) (see6.3.2.3 6.3.2.36.3.3 ).

6.3.2 Protection by Double Insulation.

Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall beas follows:

Protection by use of double insulation is intended to prevent the occurrence of hazardous touchvoltages on the accessible parts through a failure in the basic insulation.

When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to beprotected by a system of double insulation, or its equivalent. Where such a system is employed,the equipment shall be distinctively marked.

6.3.2.1

Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall beas follows: Protection by use of double insulation is intended to prevent the occurrence of hazardoustouch voltages on the accessible parts through a failure in the basic insulation.

6.3.2.2

When this the means described in 6.3.2.1 is used to prevent a hazardous touch voltage, the equipmentshall be distinctively marked and shall be listed to be protected by a system of double insulation, or itsequivalent. Where such a system is employed, the equipment shall be distinctively marked.

6.3.2.3 Protection by Automatic Disconnection of Supply.

Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protectivedevice in the event of a fault is intended to shall prevent an exposure to a continuous hazardous touchvoltage. These protective measures shall comprise both of the following:

(1) Protective bonding of exposed conductive parts (see 8.2.3)

(2) The use of overcurrent protection devices for the automatic disconnection of the supply in the eventof a fault

6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits .

6.4.1 General Requirements.


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6.4.1.1

The use of PELV, as described in Section 6.4, is to shall protect persons against electric shock fromindirect contact and limited area direct contact.

6.4.1.2

Class 2 circuits, as covered in 13.1.1 and Article 725 of NFPA 70 (NEC), shall be permitted to beused to provide protection from electric shock and other hazards.

6.4.2

PELV circuits shall satisfy all of the following conditions:

(1) The nominal voltage shall not exceed the following:

(a) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally drylocations and when large area contact of live parts with the human body is not expected

(b) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases

(2) One side of the circuit or one point of the source of the supply of that circuit shall be connected to theequipment grounding circuit.

(3) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separationshall be not less than that required between the primary and secondary circuits of a safety isolatingtransformer.

(4) Conductors of each PELV circuit shall be physically separated from those of any other circuit. Whenthis requirement is impracticable, the insulation provisions of 13.1.3 shall apply.

(5) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conformto the following:

(a) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltagesystems.

(b) Receptacles (socket-outlets) shall not admit plugs of other voltage systems.

6.4.3 Sources for PELV.

The source for PELV shall be one of the following:

(1) A safety isolating transformer

(2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer(e.g., a motor generator with winding providing equivalent isolation)

(3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit(e.g., a diesel-driven generator)

(4) An identified electronic power supply conforming to standards specifying measures to be taken toensure that, even in the case of an internal fault, the voltage at the outgoing terminals does notexceed the values specified in 6.4.2(1)

6.5 Protection Against Residual Voltages.

6.5.1

Live parts having a residual voltage greater than 60 volts after the supply has been disconnected shall bereduced to 60 volts or less within 5 seconds after disconnection of of disconnecting the supply voltage.

Exception No. 1: Exempted from this requirement are components Components having a stored chargeof 60 microcoulombs or less shall be exempt from this requirement .

Exception No. 2: Where such a provision would interfere with the functioning of the equipment, a durablesafety sign drawing that draws attention to the hazard and stating states the delay required before entryto the enclosure is allowed shall be displayed at an easily a plainly visible location on or immediatelyadjacent to the enclosure containing the capacitance.


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6.5.2

The withdrawal of plugs or similar devices, which results in the exposure of conductors (e.g., pins), shallhave a discharge time that does not exceed 1 second.

Exception No. 1: Exempted from this requirement are components having a stored charge of60 microcoulombs or less.

Exception No. 2: Exempted from this requirement are conductors that are protected against directcontact.

6.5.3 Discharge of Stored Energy.

Capacitors shall be provided with a means of discharging stored energy. [70:460.6]

6.5.3.1 Time of Discharge.

The residual voltage of a capacitor shall be reduced to 50 volts, nominal, or less, within 1 minute after thecapacitor is disconnected from the source of supply. [70:460.6(A)]

6.5.3.2 Means of Discharge.

The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitorbank, or provided with automatic means of connecting it to the terminals of the capacitor bank on removalof voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used.[70:460.6(B)]

6.6 Arc Flash Hazard Warning.

A safety sign shall be provided in accordance with 16.2.3.



FR-28_Ch_6_Annex_changes.docx

79-FR-28_Chapter_6_editorial_revisions.docx For committee use




Street Address:

City:

State:

Zip:

Submittal Date: Wed Mar 02 09:14:29 EST 2016

Committee Statement

CommitteeStatement:

To maintain consistency with IEC 60204-1 and other IEC standards, the section is revised to use theterms “Basic Protection” and “Fault Protection” as they are not in conflict with NEC terms. The IECterminology “protection against direct contact” has been replaced with “basic protection” and the term“protection against indirect contact” has been replaced with “fault protection”. The revised languagealigns NFPA 79 with similar language in Ed. 6 of IEC 60204-1.The revised text retains the use of theterm “Live parts” in section 6.2.1 for consistency within NFPA 79 and the NEC.

Renumbering of 6.1 – 6.3 was done to correct editorial errors and group "enclosure" relatedrequirements together.

The phrase “and warn of potential arc-flash hazards” was removed because Chapter 16 contains therequirements for markings and signs.

Figure 6.2.3 was retained as normative requirements cannot be located in an informative annex.


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Class 2 circuits have a long history of acceptable use without additional shock barriers in the NECand now specifically addressed in NFPA 79. There is no reason they should not be allowed to beused for industrial machinery as protection from shock.

Annex

Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated.

Moving A.6.2.4.1 to A.6.2.3.1.1--PI162 moved reference section.

Moving A.6.3.1.1 to A.6.3.1--PI162 moved reference section.

ResponseMessage:

Public Input No. 185-NFPA 79-2016 [Section No. A.6.2.4.1]

Public Input No. 184-NFPA 79-2016 [Section No. A.6.2]

Public Input No. 162-NFPA 79-2016 [Chapter 6]






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FR-28, annex material changes A.6.2 Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free. A.6.2.4.1 A.6.2.3.1.1 See NFPA 70E, for additional information on work practices.

A.6.3.1.1 A.6.3.1 Ripple-free is conventionally defined for a sinusoidal ripple voltage as a ripple content of not more than 10 percent rms. For additional information on isolating transformers, refer to IEC 60742 and IEC 61558-1. In addition, the following measures need to be considered:

1. The type of supply and grounding system 2. The impedance values of the different elements of the equipment grounding system 3. The characteristics of the protective devices used to detect insulation failure

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Chapter 6 Protection from Electrical Hazards 6.1* General. Electrical equipment shall provide basic protection (see Sections 6.2 and 6.4) and fault protection (see Sections 6.3 and 6.4) of to persons from electric shock by basic protection (see Sections 6.2 and 6.4) and fault protection (see Sections 6.3 and 6.4).

6.2 Basic Protection. 6.2.1 General.

The basic protection (see 3.3.11) requirements of 6.2.2 or 6.2.3 shall be applied to Live live parts operating at 50 volts rms ac or 60 volts dc or more, the basic protection (see 3.3.11) requirements of 6.2.2 or 6.2.3 shall be applied.

ORIGINAL: 6.2.2 Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions.

NEW: 6.2.2 Protection by Insulation of Live Parts.

6.2.2.1

Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction.

6.2.2.2

Such insulation as described in 6.2.2.1 shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions.

6.2.2.3

Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions.

6.2.3 Protection by Enclosures. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure 6.2.3.)

Figure 6.2.3 Jointed Test Finger.

Commented [BS1]: This section was broken up into 3 subsections per MOS. See below for new structure.

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Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3. The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction. 6.2.3.1 4 Enclosure Interlocking. When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control

Page 36 of 114

enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.

Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of 16.2.4. Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of 16.2.4. 6.2.3.1.1* Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain access without removing power.

6.2.3.1.2 The interlocking means shall meet the following requirements:

1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock

2) Be reactivated automatically when the door(s) is closed

3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action

6.2.3.1.3 Where provided with a defeat mechanism as permitted in 6.2.3.1.2(1), live parts mounted on the inside of doors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question.

6.2.3.2 Enclosure Access. When a qualified person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met:

1) The use of a key or tool shall be required for opening the enclosure.

2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be any direct contact with live parts.

6.3 Fault Protection. 6.3.1* General. Fault protection (see 3.3.46) is intended to preventpreventing hazardous conditions to continue in the event of an insulation fault between live and exposed conductive parts shall be provided).For each circuit part or part of the electrical equipment, at least one of the following measures shall be applied:

1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation (see 6.3. 2), or

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2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductors affected by the automatic operation of a protective device in case of a fault) (see 6.3. 3).

ORIGINAL: 6.3. 2 Protection by Double Insulation. Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be as follows:

1) Protection by use of double insulation is intended to prevent the occurrence of hazardous touch voltages on the accessible parts through a failure in the basic insulation.

2) When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to be protected by a system of double insulation, or its equivalent. Where such a system is employed, the equipment shall be distinctively marked.

NEW: 6.3.2 Protection by Double Insulation.

6.3.2.1 Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be as follows: Protection by use of double insulation is intended to prevent the occurrence of hazardous touch voltages on the accessible parts through a failure in the basic insulation. 6.3.2.2 When thisthe means described in 6.3.2.1is used to prevent a hazardous touch voltage, the equipment shall be distinctively marked and shall be listed to be protected by a system of double insulation, or its equivalent. Where such a system is employed, the equipment shall be distinctively marked.

6.3. 3 Protection by Automatic Disconnection of Supply. Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protective device in the event of a fault is intended toshall prevent an exposure to a continuous hazardous touch voltage. These protective measures shall comprise both of the following:

1) Protective bonding of exposed conductive parts (see 8.2.3)

2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event of a fault

6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits. ORIGINAL: 6.4.1 General Requirements. The use of PELV, as described in Section 6.4, is to protect persons against electric shock from indirect contact and limited area direct contact. Class 2 circuits as covered in 13.1.3 and NEC Article 725 shall be permitted to be used to provide protection from electric shock and other hazards.

Commented [BS2]: This section was revised to comply with MOS. Numbered list was replaced with subsections. See below for new structure.

Commented [BS3]: This section was broken out into subsections to conform with MOS. See below for new structure.

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NEW: 6.4.1 General Requirements. 6.4.1.1 The use of PELV, as described in Section 6.4, is toshall protect persons against electric shock from indirect contact and limited area direct contact. 6.4.1.2 Class 2 circuits, as covered in 13.1.1 and Article 725 of NFPA 70(NEC), shall be permitted to be used to provide protection from electric shock and other hazards.

6.4.2 PELV circuits shall satisfy all of the following conditions:

1. The nominal voltage shall not exceed the following: 1. 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is

used in normally dry locations and when large area contact of live parts with the human body is not expected

2. 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases 2. One side of the circuit or one point of the source of the supply of that circuit shall

be connected to the equipment grounding circuit. 3. Live parts of PELV circuits shall be electrically separated from other live circuits.

Electrical separation shall be not less than that required between the primary and secondary circuits of a safety isolating transformer.

4. Conductors of each PELV circuit shall be physically separated from those of any other circuit. When this requirement is impracticable, the insulation provisions of 13.1.3 shall apply.

5. Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform to the following:

1. Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltage systems.

2. Receptacles (socket-outlets) shall not admit plugs of other voltage systems.

6.4.3 Sources for PELV. The source for PELV shall be one of the following:

1. A safety isolating transformer 2. A source of current providing a degree of safety equivalent to that of the safety

isolating transformer (e.g., a motor generator with winding providing equivalent isolation)

3. An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit (e.g., a diesel-driven generator)

4. An identified electronic power supply conforming to standards specifying measures to be taken to ensure that, even in the case of an internal fault, the voltage at the outgoing terminals does not exceed the values specified in 6.4.2 (1)

6.5.1

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Live parts having a residual voltage greater than 60 volts after the supply has been disconnected shall be reduced to 60 volts or less within 5 seconds after disconnectionof disconnecting of the supply voltage. Exception No. 1: Components having a stored charge of 60 microcoulombs or less shall be exempt from this requirementExempted from this requirement are components having a stored charge of 60 microcoulombs or less.

Exception No. 2: Where such a provision would interfere with the functioning of the equipment, a durable safety sign drawing that draws attention to the hazard and stating the delay required before entry to the enclosure is allowed shall be displayed at a plainly visible location on or immediately adjacent to the enclosure containing the capacitance.

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First Revision No. 65-NFPA 79-2016 [ Section No. 7.2.10.1 [Excluding any Sub-Sections]

]


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Each motor controller and its associated wiring shall be protected as an individual branch circuit by ashort-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating ofthe designated SCPD shall be as shown in Table 7.2.10.1.

Exception No. 1: Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. Theprovisions of NFPA 70 shall be observed for Design B energy efficient motor circuits.

Exception No. 2: Where the controller is an adjustable speed drive that is listed and marked “Suitable forOutput Conductor Protection,” the maximum rating of the designated SCPD shall be determined byreplacing the full-load current in Table 7.2.10.1 with the drive’s rated input current. The SCPD shall notexceed the rating marked on the adjustable speed drive or in the manufacturer’s instructions.

Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, andMotor Controller

Full-Load Current (%)

Fuse Class with Non–Time Delay AC-2 AC-3 AC-4

R 300 300 300

CF or J 300 300 300

CC 300 300 300

T 300 300 300

Type of Application2

Fuse Class with Time Delay1 AC-2 AC-3 AC-4

RK-53 150 175 175

RK-1 150 175 175

CF or J 150 175 225

CC 150 300 300

Instantaneous trip circuit breaker4 800 800 800

Inverse trip circuit breaker5 150 250 250

Note: Where the values determined by this table do not correspond to the standard sizes or ratings, thenext higher standard size, rating, or possible setting shall be permitted.

1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for thestarting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed225 percent. The rating of a time-delay Class CC fuse and non–time-delay Class CC, J, CF, or T fuse shallbe permitted to be increased but shall in no case exceed 400 percent of the full-load current.

2 Types of starting duty are as follows:

(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.

(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off whilerunning, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10operations per 10 minutes and all wye-delta and two-step autotransformer starting motors.

(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching,jogging.

3Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only withNEMA-rated motor controllers.

4Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of thefollowing:

(a) They are adjustable.

(b) Part of a the combination controller has motor-running protection and also , short-circuit protection,and ground-fault protection in each conductor.

(c) The combination is especially identified for use.


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(d) It is installed per any instructions included in its listing or labeling.

(e) They are limited to single motor applications, ; circuit breakers with adjustable trip settings areto shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of themotor full-load current.

5Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the startingcurrent of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-loadcurrents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes.



Organization: National Fire Protection Assoc

Street Address:

City:

State:

Zip:

Submittal Date: Fri Mar 11 11:38:23 EST 2016

Committee Statement

CommitteeStatement:

Drive technology is capable of providing output conductor short-circuit and ground-fault protection.There is a UL 61800-5-1 task group developing requirements to investigate and mark a drive forprotecting its output conductors in individual-motor and group installations. This change permits theuse of such a drive to decouple the output conductor sizing from the branch circuit protective devicesizing. This proposal is related to the proposed change to 7.2.10.4(2).

ResponseMessage:

Public Input No. 164-NFPA 79-2016 [Section No. 7.2.10.1 [Excluding any Sub-Sections]]


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7.2.10.4

Two or more motors, or one or more motor(s) and other load(s), and their control equipment shall bepermitted to be connected to a single branch circuit where short-circuit and ground-fault protection isprovided by a single inverse time circuit breaker or a single set of fuses, provided the following conditionsunder 7.2.10.4(1) and either 7.2.10.4(2) or 7.2.10.4(3) are met:

(1) Each motor controller and overload device is either listed for group installation with specifiedmaximum branch-circuit protection or selected such that the ampere rating of the motor branch short-circuit and ground-fault protective device does not exceed that permitted by 7.2.10.1 for thatindividual motor controller or overload device and corresponding motor load.

(2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceedthe values in Table 7.2.10.4 for the smallest conductor in the circuit.

Exception: Where a controller is an adjustable speed drive that is listed and marked “Suitable forOutput Conductor Protection,” the conductors from the drive to the motor shall not apply todetermining the smallest conductor in the circuit. The conductors from the drive to the motor shallhave an ampacity in accordance with Sections 12.5 and 12.6 .

(3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the valuespecified in 7.2.10.1 for the highest rated motor connected to the branch circuit plus an amountequal to the sum of the full-load current ratings of all other motors and the ratings of other loadsconnected to the circuit. Where this calculation results in a rating less than the ampacity of thebranch circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuitbreaker to a value not exceeding that permitted by Sections 12.5 and 12.6. Overcurrent protectionfor loads other than motor loads shall be in accordance with 7.2.3, 7.2.4, and 7.2.11. Where16 AWG or 18 AWG conductors are used for branch circuit conductors or tap conductors under7.2.10.5, the rating and type of the branch short-circuit and ground-fault protection shall be inaccordance with 12.6.1.

Table 7.2.10.4 Relationship Between Conductor Size and Maximum Rating or Setting of Short-CircuitProtective Device for Power Circuits Group Installations

Conductor Size

(AWG)

Maximum Rating

Fuse or Inverse Time*

Circuit Breaker

(amperes)

18 See footnote.

16 See footnote.

14 60

12 80

10 100

8 150

6 200

4 250

3 300

2 350

1 400

0 500

2/0 600

3/0 700

4/0 800

*Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and18 AWG shall be determined in accordance with 12.6.1.



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Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The listing requirement was added to ensure products were evaluated to the productstandard. The text was reformatted for clarity.

ResponseMessage:



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Grounding and Bonding




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The titlewould match that used in the NEC for Article 250.

ResponseMessage:



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8.1.2 Connections.

Grounded Except at either the source or first disconnecting means of a grounded separately derivedsystem, grounded conductors shall not be connected to the equipment grounding circuit, except forseparately derived systems conductor .


Submitter Full Name: Sonia Barbosa


Street Address:

City:

State:

Zip:

Submittal Date: Wed Mar 16 12:11:49 EDT 2016

Committee Statement

CommitteeStatement:

The rewording of 8.1.2 clarifies that reconnection of the equipment ground to the groundedconductor after the source of supply to the machine as well as after the first disconnecting meansof a separately derived system is prohibited. This language also correlates with language used inArticle 250 of NFPA 70.

ResponseMessage:


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8.2 Equipment Grounding Circuit Conductors and Bonding Jumpers .

8.2.1 Grounding Circuit Equipment Parts.

The equipment frame and all non-current-carrying conductive parts, material, or other equipment likely tobecome energized shall be bonded together and connected to an equipment grounding circuit conductoror bonding jumper . shall consist of the following:

Equipment grounding conductor terminal(s)

Equipment grounding conductors and equipment bonding jumpers

Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energizedshall not be required to be grounded.

8.2.1.1 Grounding Circuit Stress Effective Ground Fault Current Path .

All parts of the equipment grounding circuit shall be capable of withstanding the highest thermal andmechanical stress that can be caused by fault currents flowing in that part of the circuit. All exposedconductive parts of the electrical equipment and the machine(s) shall be connected to the equipmentgrounding circuit All parts of the effective ground fault current path shall be capable of withstanding thehighest thermal and mechanical stress that can be caused by fault currents in that part of the circuit .

8.2.1.2 Equipment Grounding and Bonding .

The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely tobe energized shall be effectively grounded. Where electrical devices are mounted on metal mountingpanels that are located within nonmetallic enclosures, the metal mounting panels shall be effectivelygrounded. Where specified by the manufacturer, components and subassemblies shall be bonded to theequipment grounding circuit in accordance with the manufacturer’s instructions.

8.2.1.2.1

The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely tobecome energized shall be effectively grounded connected in a manner that provides an effective groundfault current path .

8.2.1.2.2

Where electrical devices are mounted on metal mounting panels that are located within nonmetallicenclosures, the metal mounting panels shall be effectively grounded. Where electrical devices aremounted on metal mounting panels that are located within nonmetallic enclosures, the metal mountingpanels shall be effectively grounded. Where specified by the manufacturer, components andsubassemblies shall be bonded to the equipment grounding circuit in accordance with the manufacturer’sinstructions connected to an equipment grounding conductor or bonding jumper .

8.2.1.2.3

Where specified by the manufacturer, components and subassemblies shall be bonded in accordancewith the manufacturer’s instructions.

8.2.1.3* Equipment Grounding Conductor Terminal.

8.2.1.3.1

For each incoming supply circuit, an equipment grounding conductor terminal shall be provided in thevicinity of the associated phase conductor terminals and connected to the equipment groundingconductor .

8.2.1.3.2

All of the items in 8.2.1.2 shall be interconnected to the equipment grounding conductor terminal Theequipment grounding conductor terminal shall accommodate an equipment grounding conductor sized inaccordance with Table 8.2.2.4.


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8.2.1.3.3

The equipment grounding conductor terminal shall accommodate an equipment grounding conductorsized in accordance with Table 8.2.2.3 .

8.2.1.3.3*

The equipment grounding conductor terminal shall be identified with the word “GROUND,” the letters“GND” or “GRD,” the letter “G,” the color GREEN, or the symbol shown in Figure 8.2.1.3.3Figure8.2.1.3.4 . ; In in addition to the required marking , the letters “ PE” shall also be permitted to identify thisterminal.

Figure 8.2.1.3.3 Grounding Symbol.

8.2.1.3.4

Where an auxiliary grounding electrode is specified, the terminal shall accommodate this additionalgrounding electrode conductor.

8.2.2 Equipment Grounding Conductors and Bonding Jumpers.

8.2.2.1

Equipment grounding conductors and bonding jumpers shall be identified in accordance with 13.2.2.

8.2.2.2

Conductors used for grounding and bonding purposes shall be copper.

8.2.2.2.1

Stipulations on stranding and flexing as outlined in Chapter 12 shall apply.

8.2.2.3

Equipment grounding conductors and bonding jumpers shall be insulated, covered, or bare and shall beprotected against physical damage.


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8.2.2.4

Equipment grounding conductors and bonding jumpers of the wire type shall not be smaller than shown inTable 8.2.2.4, but shall not be required to be larger than the circuit conductors supplying the equipment.

Table 8.2.2.4 Minimum Size of Equipment Grounding Conductors and Bonding Jumpers

Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of theEquipment

(Not Exceeding Amperes)

Copper ConductorSize

(AWG or kcmil)

10 16

15 14

20 12

30 10

40 10

60 10

100 8

200 6

300 4

400 3

500 2

600 1

800 1/0

1000 2/0

1200 3/0

1600 4/0

2000 250

2500 350

3000 400

4000 500

5000 700

6000 800

8.2.3 Continuity of the Equipment Grounding Circuit .

8.2.3.1

The continuity Continuity of the equipment grounding circuit conductors and bonding jumpers shall beensured by effective connections through conductors .

8.2.3.2

Removing a device shall not interrupt the continuity of the equipment grounding circuit conductor orbonding jumper .

8.2.3.3

Bonding of equipment with bolts or other identified means shall be permitted if paint and dirt are removedfrom the joint surfaces or the bonded members are effectively penetrated.

8.2.3.4

Raceways, wireways, and cable trays shall not be used as equipment grounding or bonding conductors.

8.2.3.5 Doors or Covers.

8.2.3.5.1

Where electrical devices are mounted on conductive doors or covers, an equipment bonding jumper shallbe installed.


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8.2.3.5.2

Where required, an equipment bonding jumper shall connect the conductive door or cover to theequipment enclosure or to an equipment grounding terminal within the enclosure.

8.2.3.6

Portable, pendant, and resilient-mounted equipment shall be bonded by separate conductors. Where ;where multiconductor cable is used, the bonding conductor shall be included as one conductor of thecable.

8.2.4* Exclusion of Switching Devices.

The equipment grounding circuit shall not contain any switches or overcurrent protective devices.Separable connections such as those provided in drawout equipment or attachment plugs and matingconnectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, andconnectors preclude energization without grounding continuity.

8.2.4.1

The equipment grounding circuit shall not contain any switches or overcurrent protective devices.

8.2.4.2

Separable connections such as those provided in drawout equipment or attachment plugs and matingconnectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.

8.2.4.3

First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, andconnectors preclude energization without grounding continuity.

8.2.5 Equipment Grounding Conductor Connecting Points.

8.2.5.1

All equipment grounding conductors shall be terminated in accordance with 13.1.1. The , and theequipment grounding conductor connecting points shall have no other function.

8.2.5.2*

The equipment grounding conductor connecting points, other than the equipment grounding terminal, shallbe identified by the color GREEN, by the bicolor combination of GREEN-AND-YELLOW, or by use of thesymbol shown in Figure 8.2.1.3.3Figure 8.2.1.3.4 .



79-FR-29_8.2_editorial_revisions.docx For committee use




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Committee Statement

CommitteeStatement:

Grounding and bonding terms are revised to harmonize with those used in the NEC. The term"equipment grounding circuit" was created during the development of NFPA 79, 2002, but is not usedin Article 250 of NFPA 70. This was based on the concept of using an industrial machine frame,


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instead of installing separate equipment grounding conductors or equipment bonding jumpers toequipment needing an effective ground fault current path. The industrial machine frame is notpermitted to be used this way so this term is not relevant or useful and is creating confusion as theterm circuit typically is associated with current-carrying conductors.

Editorial changes are incorporated for clarity and usability.

The term "incoming" was removed in front of the term "supply" to correlate with other resolutionstaken by the committee in Ch 5.

ResponseMessage:



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8.2 Equipment Grounding Conductors and Bonding Jumpers.

8.2.1 Equipment Parts. The equipment frame and all non-current carrying conductive parts, material, or other equipment likely to become energized, shall be bonded together and connected to an equipment grounding conductor or bonding jumper.

Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energized shall not be required to be grounded.

8.2.1.1 Effective Ground Fault Current Path. All parts of the effective ground fault current path shall be capable of withstanding the highest thermal and mechanical stress that can be caused by fault currents in that part of the circuit.

ORIGINAL: 8.2.1.2 Equipment Grounding and Bonding. The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to be energized shall be connected in a manner that provides an effective ground fault current path. Where electrical devices are mounted on metal mounting panels that are located within nonmetallic enclosures, the metal mounting panels shall be connected to an equipment grounding conductor or bonding jumper. Where specified by the manufacturer, components and subassemblies shall be bonded in accordance with the manufacturer’s instructions.

NEW: 8.2.1.2 Equipment Grounding and Bonding.

8.2.1.2.1

The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to become energized shall be connected in a manner that provides an effective ground fault current path.

8.2.1.2.2

Where electrical devices are mounted on metal mounting panels that are located within nonmetallic enclosures, the metal mounting panels shall be connected to an equipment grounding conductor or bonding jumper.

8.2.1.2.3

Where specified by the manufacturer, components and subassemblies shall be bonded in accordance with the manufacturer’s instructions.

8.2.1.3* Equipment Grounding Conductor Terminal.

Commented [BS1]: This section was broken into subsections to conform with the MOS. See below for new structure.

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8.2.1.3.1 For each supply circuit, an equipment grounding conductor terminal shall be provided in the vicinity of the associated phase conductor terminals and connected to the equipment grounding conductor.

8.2.1.3. 2The equipment grounding conductor terminal shall accommodate an equipment grounding conductor sized in accordance with Table 8.2.2.3.

8.2.1.3. 3* The equipment grounding conductor terminal shall be identified with the word “GROUND,” the letters “GND” or “GRD,” the letter “G,” the color GREEN, or the symbol shown in Figure 8.2.1.3. 3;. In in addition to the required marking, the letters PE shall also be permitted to identify this terminal.

(Insert Image Here With No Change)

FIGURE 8.2.1.3. 3Grounding Symbol.

8.2.1.3. 4Where an auxiliary grounding electrode is specified, the terminal shall accommodate this additional grounding electrode conductor.

8.2.2 Equipment Grounding Conductors and Bonding Jumpers.

8.2.2.1 Equipment grounding conductors and bonding jumpers shall be identified in accordance with 13.2.2.

8.2.2.1 2 Conductors used for grounding and bonding purposes shall be copper. Stipulations on stranding and flexing as outlined in Chapter 12 shall apply.

8.2.2.2 3 Equipment grounding conductors and bonding jumpers shall be insulated, covered, or bare and shall be protected against physical damage.

8.2.2.3 4 Equipment grounding conductors and bonding jumpers of the wire type shall not be smaller than shown in Table 8.2.2.3, but shall not be required to be larger than the circuit conductors supplying the equipment.

Table 8.2.2.3 Minimum Size of Equipment Grounding Conductors and Bonding Jumpers

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(Insert Table Here With No Change)

8.2.3 Continuity.

8.2.3.1 Continuity of equipment grounding conductors and bonding jumpers shall be ensured by effective connections.

8.2.3.2 Removing a device shall not interrupt the continuity of the equipment grounding conductor or bonding jumper.

8.2.3.3 Bonding of equipment with bolts or other identified means shall be permitted if paint and dirt are removed from the joint surfaces or the bonded members are effectively penetrated.

8.2.3.4

Raceways, wireways, and cable trays shall not be used as equipment grounding or bonding conductors.

8.2.3.5 Doors or Covers.

8.2.3.5.1

Where electrical devices are mounted on conductive doors or covers, an equipment bonding jumper shall be installed.

8.2.3.5.2

Where required, an equipment bonding jumper shall connect the conductive door or cover to the equipment enclosure or to an equipment grounding terminal within the enclosure.

8.2.3.6

Portable, pendant, and resilient-mounted equipment shall be bonded by separate conductors;. Where where multiconductor cable is used, the bonding conductor shall be included as one conductor of the cable.

ORIGINAL: 8.2.4* Exclusion of Switching Devices.

The equipment grounding circuit shall not contain any switches or overcurrent protective devices. Separable connections such as those provided in drawout equipment or attachment plugs and mating connectors and receptacles shall provide for first-make,

Commented [BS2]: This section was broken out into subsections to conform with the MOS. See below for new structure.

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last-break of the equipment grounding conductor. First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, and connectors preclude energization without grounding continuity.

NEW: 8.2.4* Exclusion of Switching Devices.

8.2.4.1 The equipment grounding circuit shall not contain any switches or overcurrent protective devices.

8.2.4.2 Separable connections such as those provided in drawout equipment or attachment plugs and mating connectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.

8.2.4.3 First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, and connectors preclude energization without grounding continuity.

8.2.5 Equipment Grounding Conductor Connecting Points.

8.2.5.1

All equipment grounding conductors shall be terminated in accordance with 13.1.1. The, and the equipment grounding conductor connecting points shall have no other function.

8.2.5.2*

The equipment grounding conductor connecting points, other than the equipment grounding terminal, shall be identified by the color GREEN, by the bicolor combination of GREEN-AND-YELLOW, or by use of the symbol shown in Figure 8.2.1.3.4.

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9.1.1.4

The source of supply for all control circuits shall be taken from the load side of the supply disconnectingmeans.

Exception: The power supply circuit to memory elements and their support logic requiring power at alltimes to maintain the storage of information control circuits meeting the requirements of exceptedcircuits in 5.3.5.1(4) shall be permitted to be taken from the line side of the supply disconnecting meansor other power source.




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Committee Statement

CommitteeStatement:

The revised text identifies the circuits as excepted circuits and refers users to the appropriatesections for devices. Individual terms identified in the public input to be added would be covered in5.3.5.1(4) as items that are required to be energized for satisfactory operation.

ResponseMessage:



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First Revision No. 47-NFPA 79-2016 [ New Section after 9.2.5.3.2 ]

9.2.5.4 Stop by De-Energization.

Except for cycle stop commands (stop by energization), stop functions shall be initiated byde-energization, not energization of a device or as a command to a programmable logic controller(PLC).




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Committee Statement

CommitteeStatement:

The requirement for de-energization to cause a "stop" to occur was lost over the past editions. AnException was added that would be for the "Cycle Stop" or "Top Stop" command to ceaseautomatic process operation without de-energization.

Original language was rewritten for clarity based on editorial comments.

ResponseMessage:

Public Input No. 170-NFPA 79-2016 [New Section after 9.2.5.3.2]


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10.1.6.2 Arrangement of Operator Interface Devices.

All start pushbuttons shall be mounted above or to the left of their associated stop pushbuttons.

Exception No. 1: Start This requirement shall not apply to start pushbuttons in series, such as operatingpushbuttons on punch presses.

Exception No. 2: Wobble-stick or rod-operated emergency stop pushbuttons mounted in the bottom ofpendant stations This requirement shall not apply to emergency stop devices .




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CommitteeStatement:

Emergency stop devices are uniquely identifiable and have location and mounting requirementsalready given in 10.7. As emergency stop devices can be associated with more than one startbutton, the requirement to locate the start buttons relative to an emergency stop device isconfusing.

ResponseMessage:



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11.2.1.1

All items of control equipment shall be placed and oriented so that they can be identified without movingthem or the wiring. Where practicable, with items that require checking or adjustment for correct operationor that are liable to need replacement, those actions shall be possible without dismantling otherequipment or parts of the machine (except opening doors or removing covers). Terminals not associatedwith control equipment shall also conform to these requirements.

11.2.1.1.1

Where practicable, with items that require checking or adjustment for correct operation or that are liable toneed replacement, those actions shall be possible without dismantling other equipment or parts of themachine (except opening doors or removing covers).

11.2.1.1.2

Terminals not associated with control equipment shall also conform to these requirements.

11.2.1.1.3

The requirements in 11.2.1.1 , 11.2.1.1.1 , and 11.2.1.1.2 shall not apply to modules orsubassemblies that are disposable, permanently sealed, or unable to be opened.



79-FR-32_11.2.1.1_editorial_revisions.docx For committee use




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Committee Statement

CommitteeStatement:

An exception has been added to parts of the machine that cannot be serviced. Broke outparagraph with several requirements into subsections for usability and clarity based on editorialcomments

ResponseMessage:



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ORIGINAL: 11.2.1.1 All items of control equipment shall be placed and oriented so that they can be identified without moving them or the wiring. Where practicable, with items that require checking or adjustment for correct operation or that are liable to need replacement, those actions shall be possible without dismantling other equipment or parts of the machine (except opening doors or removing covers). Terminals not associated with control equipment shall also conform to these requirements. Exception: These requirements shall not apply to modules or subassemblies which are disposable, permanently sealed, and cannot be opened.

NEW: 11.2.1.1

All items of control equipment shall be placed and oriented so that they can be identified without moving them or the wiring. Where practicable, with items that require checking or adjustment for correct operation or that are liable to need replacement, those actions shall be possible without dismantling other equipment or parts of the machine (except opening doors or removing covers). Terminals not associated with control equipment shall also conform to these requirements. 11.2.1.1.1 Where practicable, with items that require checking or adjustment for correct operation or that are liable to need replacement, those actions shall be possible without dismantling other equipment or parts of the machine (except opening doors or removing covers). 11.2.1.1.2 Terminals not associated with control equipment shall also conform to these requirements. 11.2.1.1.3 The requirements in 11.2.1.1, 11.2.1.1.1, and 11.2.1.1.2 shall not apply to modules or subassemblies that are disposable, permanently sealed, or unable to be opened.

Commented [BS1]: This section was broken into subsections to conform with the MOS and the Exception was changed to a subsection. See below for new structure.

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11.2.1.10

Busbars shall be securely fastened in place and the minimum spacing between uninsulated parts ofbusbars, busbar terminals, and other bare metal parts shall not be less than specified in Table430.97(D) of NFPA 70 .




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Committee Statement

CommitteeStatement:

Table 430.97(D) of NFPA 70 provides specific requirements for busbar spacings. Theseseparation or clearance requirements can also be found in Section 409.106 and in UL 508A.Providing this new language into NFPA 79 aids in pointing the user to these requirements.

ResponseMessage:

Public Input No. 183-NFPA 79-2016 [New Section after 11.2.1.9]


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11.2.2.1

Machine compartments containing control equipment shall be completely isolated from coolant and oilreservoirs. The compartment shall be readily accessible and completely enclosed. The compartment shallnot be considered enclosed where it is open to the floor, to the foundation upon which the machine rests,or to other compartments of the machine that are not clean and dry.

11.2.2.1.1

Compartments containing equipment required to be readily accessible, such as branch circuitovercurrent devices, shall be readily accessible and completely enclosed.

11.2.2.1.2

The compartment shall not be considered enclosed where it is open to the floor, to the foundation uponwhich the machine rests, or to other compartments of the machine that are not clean and dry.




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CommitteeStatement:

Machine cabinets and compartments do not always need to be located where they are within easyreach of the floor or a platform. It can be desirable to locate some components that do not needfrequent access, maintenance or servicing at higher locations. Not all equipment needs to be readilyaccessible from the floor. This can also help provide better access and workspace to the industrialmachine and other equipment that does need more frequent access.

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11.4.8

A print pocket sized to accommodate physical electrical diagrams or software media shall be attached tothe inside or outside of the door of the control enclosure or compartment. When this is not practicable, itshall be permissible to place a pocket suitable for the environment outside the door of the controlenclosure or compartment in a well-identified location. Single-door and multi-door enclosures shall haveat least one print pocket.

11.4.8.1

When this is not practicable, it shall be permissible to place a pocket suitable for the environment outsidethe door of the control enclosure or compartment in a well-identified location.

11.4.8.2

Single-door and multi-door enclosures shall have at least one print pocket.




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Committee Statement

CommitteeStatement:

This action takes into account the changing technology being used to provide documentationof the provided machinery.

Broke out the single paragraph with several requirements into subsections for usability andclarity.

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12.5.2*

Conductors with higher insulation temperatures than specified for the termination(s) shall be permitted tobe used for ampacity adjustment, correction, or both, provided the final tabulated ampacity does notexceed the lowest value of any termination.

Exception: Ampacities of 90°C (194°F) insulated conductors or other special purpose conductors withhigher temperature ratings can be determined in accordance with 310.15 of NFPA 70.




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Committee Statement

Committee Statement: The word tabulated is not the correct term and was removed.

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12.5.5

Conductors supplying a single motor or multiple motors shall be permitted to be sized based on 125percent of the highest rated motor at demand factors based on the loading or application of the motors.




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CommitteeStatement:

Motors such as servo applications are frequently used at a small portion of their full load rating. Ifmany servo motors are on a machine without this provision the conductors used to supply thosemotors are or would be sized many times larger than what they need to be.

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12.8.3

Where ampacity derating adjustment is required for more than three current-carrying conductors, thefactor(s) shall be taken from Table 12.5.6(b).




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Committee Statement

CommitteeStatement:

The term adjustment is the appropriate term to refer to a factor based on more than threecurrent carrying conductors.

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13.1.2.4*

Cable assemblies with factory-applied connectors and their associated wiring devices shall bepermitted, and such connectors shall not be considered as splices or joints.



FR-36_A.13.1.2.4.docx




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Committee Statement

CommitteeStatement:

Product standards and products are available for wiring system components suitable for industrialmachinery including cable assemblies and associated wiring devices such as tees, panel-mountedfittings, field-wired fittings, and so forth. Annex material will be submitted.

The new annex note provides a reference to two standards that address the cable assemblies andassociated wiring devices that 13.1.2.4 describes.

ResponseMessage:

Public Input No. 172-NFPA 79-2016 [New Section after 13.1.2.3]

Public Input No. 174-NFPA 79-2016 [New Section after A.13.1.2.1]


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A.13.1.2.4

For example, see UL Subject 2237 and UL 2238.

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13.1.6.1

Exposed cables installed along the structure of the equipment or system or in the chases of the machineryshall be permitted. Exposed cables and shall be installed to closely follow the surface and structuralmembers of the machinery.




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Committee Statement

CommitteeStatement:

This FR is correcting an error in the last edition of the standard by removing an asterisk andadding it to 13.1.7.1.

ResponseMessage:





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13.2.2.1*

The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipmentgrounding conductor where insulated or covered. This color identification shall be strictly reserved for theequipment grounding conductor. GREEN shall be the predominant color when used in combination withone or more YELLOW stripes.

Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is notrequired, the solid color GREEN shall be permitted for other than equipment grounding.

Exception No. 1: It shall be permitted to use conductors of other colors any color , provided the insulationor cover is appropriately identified at all points of access.

Exception No. 2: For grounded control circuits, use of a GREEN insulated conductor with or without oneor more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal onthe control panel shall be permitted.




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Committee Statement

CommitteeStatement:

Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generallyreserved for equipment grounding conductors and Exception No. 1 was too broad. The remainingexception provides the necessary flexibility from the main requirement.

This ensures that the equipment grounding conductor if striped is predominantly green.

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13.3.1*

Nonmetallic ducts wiring channels shall be permitted only when they are made with a flame-retardantinsulating material.




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Committee Statement

CommitteeStatement:

Duct was replaced with wiring channels for correlation within the standard. It should not be usedto describe an electric product in NFPA 79. The term "wiring channel" is presently used in11.2.1.5.4 and 12.5.5 and is a better term.

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13.3.4

Conductors inside enclosures shall be supported where necessary to keep them in place. Conductors ,and those that do are not run in ducts wiring channels shall be supported.




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Committee Statement

CommitteeStatement:

Duct was replaced in the standard with wiring channels for correlation. The term "wiringchannel" is presently used in 11.2.1.5.4 and 12.5.5 and is a better term.

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13.4.1 General Requirements.

The means of introduction entry of cables, cords, or ducts wireways with their individual glands,bushings, and so forth into an enclosure shall ensure that the degree of protection of the enclosure is notreduced.




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Committee Statement

CommitteeStatement:

The term "duct" has been replaced with wireways which is the applicable term outside of theenclosure. "Cords" was added as an additional means of entry. "Introduction" was changed toentry and "of the enclosure" was added for clarity.

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13.5.5.1

Liquidtight flexible nonmetallic conduit (LFNC) is a raceway of circular cross section of the followingtypes:

A smooth, seamless inner core and cover that is bonded together and has one or morereinforcement layers between the core and cover, designated as Type LFNC–A

A smoother inner surface with integral reinforcement within the conduit wall, designated as TypeLFNC–B

A corrugated internal and external surface with or without integral reinforcement within the conduitwall, designated as Type LFNC–C




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Committee Statement

CommitteeStatement:

This section is identical to the definition in Section 3.3.19.4, and is not a requirement anddoes not belong in the body of the document.

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13.5.6 Wireways(Cable Trunking Systems) .

13.5.6.1

Wireways (cable trunking systems) external to enclosures shall be rigidly supported and clear of allmoving or contaminating portions of the machine.

13.5.6.2

Covers shall be shaped to overlap the sides; gaskets shall be permitted. Covers shall be attached towireways by hinges or chains and held closed by means of captive screws or other suitable fasteners. Onhorizontal wireway, the cover shall not be on the bottom. Hinged covers shall be capable of opening atleast 90 degrees.

13.5.6.2.1

Covers shall be attached to wireways by hinges or chains and held closed by means of captive screws orother suitable fasteners.

13.5.6.2.2

On horizontal wireways, the cover shall not be on the bottom.

13.5.6.2.3

Hinged covers shall be capable of opening at least 90 degrees.

13.5.6.3

Where the wireway is furnished in sections, the joints between sections shall fit tightly, but shall not berequired to be gasketed.

13.5.6.4

The only openings permitted shall be those required for wiring or for drainage.

13.5.6.5

Wireways shall not have opened but unused knockouts.

13.5.6.6

Metal thickness and construction of wireways shall comply with ANSI/ UL 870.




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Committee Statement

CommitteeStatement:

"Cable trunking systems" is an IEC term and should have been deleted in the 2015 edition.Wireways is the correct term for use in NFPA 79. "trunking systems" is further explained inAnnex J.


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ResponseMessage:



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15.1.1 Receptacles for Accessory Equipment.

Where the machine or its associated equipment is provided with receptacle outlets to be used foraccessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply:

(1) Receptacles mounted external to externally or internally to the enclosure shall be ground-faultcircuit-interrupter (GFCI)–protected.

(2) Receptacles shall be supplied from a grounded 120-volt ac source.

(3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampereconfiguration and listed for the applied voltage.

(4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with13.4.5.3.

(5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified bySection 18.2.

Exception: Verification is not required for PELV circuits in accordance with Section 18.2.

(6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected againstovercurrent in accordance with the provisions of 7.2.5, and these circuits shall not be connected toother machine circuits.

(7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnectingdevice for the machine or section of the machine, the safety sign requirements of 5.3.5.4 shall apply.

(8) Receptacles shall be suitable for the environment. , Receptacles and those mounted external to theenclosure and subject to dirt, dust, oil, or other contaminants shall be provided with a means to coverthe receptacle when the plug is removed.




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Committee Statement

CommitteeStatement:

The revision will require ground fault circuit interrupter on internal receptacles andincrease safety.

Response Message:



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16.2.4

A safety sign shall be provided adjacent to the disconnecting operating handle(s) where the disconnect(s)that is interlocked with the enclosure door or cover does not de-energize all exposed live parts when thedisconnect(s) is in the open (off) position.




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Committee Statement

CommitteeStatement:

Stating the disconnect must be interlocked with the door limits the requirement to enclosuresutilizing doors. New technology equipment is utilizing removable covers (not hinged doors) soclarifying this requirement includes both doors and covers improves the intended safety afforded bythis required interlocking.

Adding this text is in alignment with the actions taken on PI 188 for section 5.3.3.1(3) and5.3.3.1(5).

ResponseMessage:


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17.2 Information to Be Provided.

The following information shall be provided with the electrical equipment:

(1) Clear, comprehensive description of the equipment, the installation and mounting, and theconnection to the electrical supply(ies)

(2) Electrical supply circuit(s) requirements

(3) Overview (block) diagram(s) where appropriate

(4) Schematic diagram(s)

(5) Information (where appropriate) on the following:

(a) Programming

(b) Sequence of operation(s)

(c) Frequency of inspection

(d) Frequency and method of functional testing

(e) Adjustment, maintenance, and repair

(f) Interconnection diagram

(g) Panel layouts

(h) Instruction and service manuals

(i) Physical environment (e.g., lighting, vibration, noise levels, atmospheric contaminants)

(6) A description (including interconnection diagrams) of the safeguards, interacting functions, andinterlocking of guards with potentially hazardous motions

(7) A description of the safeguarding means and methods provided where the primary safeguards areoverridden (e.g., manual programming, program verification)

(8) Information for safety lockout procedure Means provided for the control of hazardous energies

(9) Explanation of unique terms

(10) Parts list and recommended spare parts list

(11) Maintenance instructions and adjustment procedures

(12) Reference information (where appropriate) on the following:

(a) Lubrication diagram

(b) Pneumatic diagram

(c) Hydraulic diagram

(d) Miscellaneous system diagrams (e.g., coolant, refrigerant)



Chapter_17_17.2_SL_MC_FR_54_PI_85.docxThe attachment is to fix the tripped up text. The only Change was in item 8. For staff use.




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Street Address:

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Committee Statement

CommitteeStatement:

Parenthesis 8 has been revised to provide clarity as the term "control of hazardous energies"better reflects the information necessary to accomplish this requirement.

ResponseMessage:



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Section PI PAGE DISPOSITION

17.2 85 131 Create a First Revision based on PI 85 ‐ Passes

Text 17.2 Information to Be Provided.

The following information shall be provided with the electrical equipment:

(1) Clear, comprehensive description of the equipment, installation and mounting,

and the connection to the electrical supply(ies)

(2) Electrical supply circuit(s) requirements

(3) Overview (block) diagram(s) where appropriate

(4) Schematic diagram(s)

(5) Information (where appropriate) on the following:

(a) Programming

(b) Sequence of operation(s)

(c) Frequency of inspection

(d) Frequency and method of functional testing

(e) Adjustment, maintenance, and repair

(f) Interconnection diagram

(g) Panel layouts

(h) Instruction and service manuals

(i) Physical environment (e.g., lighting, vibration, noise levels, atmospheric

contaminants)

(6) A description (including interconnection diagrams) of the safeguards,

interacting functions, and interlocking of guards with potentially hazardous motions

(7) A description of the safeguarding means and methods provided where the

primary safeguards are overridden (e.g., manual programming, program

verification)

(8) Means provided for the control of hazardous energies.

(9) Explanation of unique terms

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(10) Parts list and recommended spare parts list

(11) Maintenance instructions and adjustment procedures

(12) Reference information (where appropriate) on the following:

(a) Lubrication diagram

(b) Pneumatic diagram

(c) Hydraulic diagram

(d) Miscellaneous system diagrams (e.g., coolant, refrigerant)

Statement The control of hazardous energies better reflects the information necessary to

accomplish this requirement.

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First Revision No. 43-NFPA 79-2016 [ Section No. B.1 ]


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B.1


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It is recommended that the information in Figure B.1 be provided by the intended user of the equipment. Itfacilitates an agreement between the user and supplier on basic conditions and additional userrequirements to ensure proper design, application, and utilization of the electrical equipment of themachine (see Section 4.1).

Figure B.1 Inquiry Form for the Electrical Equipment of Machines.


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Street Address:

City:

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Committee Statement

CommitteeStatement:

Replace the term "DUCT" with "wireways" in item 25 to be consistent within the standard. Theterm "duct" has been replaced with wireways which is the applicable term outside of theenclosure.

ResponseMessage:

Public Input No. 151-NFPA 79-2016 [Section No. B.1]


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First Revision No. 44-NFPA 79-2016 [ Section No. D.1 ]

Global FR-16


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D.1


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Figure D.1(a) through Figure D.1(q) are not intended to be (design) guidelines. They are included only toillustrate documentation methods.

Figure D.1(a) Cover Sheet and Sheet Index.

Figure D.1(b) System Layout and Installation Diagram.

Figure D.1(c) Block (System) Diagram.

Figure D.1(d) Interconnection Diagram.

Figure D.1(e) Elementary Schematic.


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Figure D.1(f) PLC Input Diagram.


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Figure D.1(g) PLC Output Diagram.


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Figure D.1(h) Sample Enclosure Layout — Interior.


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Figure D.1(i) Sample Enclosure Layout — Exterior.

Figure D.1(j) Sequence of Operations — Graphical.

Figure D.1(k) Sequence of Operations — Descriptive Graphical.

Figure D.1(l) Sample Servo Diagram.


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Figure D.1(m) Sample PLC Network — Station Layout.


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Figure D.1(n) Sample Operator Station.


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Figure D.1(o) Sample Parts List.

Figure D.1(p) ISO (A2) Drawing Standard Framework.


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Figure D.1(q) Selections from ANSI Y32.2/IEEE 315/315A Symbol Table.




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Committee Statement


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CommitteeStatement:

Replace the term "wire DUCT" with "wiring channel" in all locations in FIGURE D.1(h) to beconsistent within the standard.

ResponseMessage:

Public Input No. 152-NFPA 79-2016 [Section No. D.1]


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First Revision No. 67-NFPA 79-2016 [ Section No. F.5.4 ]

F.5.4

Electrical enclosures that carry only an IP-rating have not been designed to the additional NEMA 250type–rating requirements. Therefore, a type-rating cannot be assigned to an enclosure that has only beenIP-rated because of the exclusion of the additional requirements of the type-rating system. Enclosuretypes are shown in Table F.5.4.

Table F.5.4 Enclosure Selection

Provides a Degree of Protection Against the FollowingEnvironmental Conditions

For Outdoor Use

Enclosure-Type Number

3 3R 3S 3X 3RX 3SX 4 4X 6 6P

Incidental contact with the enclosed equipment X X X X X X X X X X

Rain, snow, and sleet X X X X X X X X X X

Sleet* — — X — — X — — — —

Windblown dust X — X X — X X X X X

Hosedown — — — — — — X X X X

Corrosive agents — — — X X X — X — X

Temporary submersion — — — — — — — — X X

Prolonged submersion — — — — — — — — — X

Provides a Degree of Protection Against the FollowingEnvironmental Conditions

For Indoor Use

Enclosure-Type Number

1 2 4 4X 5 6 6P 12 12K 13

Incidental contact with the enclosed equipment X X X X X X X X X X

Falling dirt X X X X X X X X X X

Falling liquids and light splashing — X X X X X X X X X

Circulating dust, lint, fibers, and flyings — — X X — X X X X X

Settling airborne dust, lint, fibers, and flyings — — X X X X X X X X

Hosedown and splashing water — — X X — X X — — —

Oil and coolant seepage — — — — — — — X X X

Oil or coolant spraying and splashing — — — — — — — — — X

Corrosive agents — — — X — — X — — —

Temporary submersion — — — — — X X — — —

Prolonged submersion — — — — — — X — — —

*Mechanism shall be operable when ice covered.

Informational Note No. 1: The term raintight is typically used in conjunction with Enclosure Types 3, 3S,3SX, 3X, 4, 4X, 6, and 6P. The term rainproof is typically used in conjunction with Enclosure Types 3R,and 3RX. The term watertight is typically used in conjunction with Enclosure Types 4, 4X, 6, 6P. The termdriptight is typically used in conjunction with Enclosure Types 2, 5, 12, 12K, and 13. The term dusttight istypically used in conjunction with Enclosure Types 3, 3S, 3SX, 3X, 5, 12, 12K, and 13.

Informational Note No. 2: Ingress protection (IP) ratings may be found in IEC 60529, Degrees ofProtection Provided by Enclosures . IP ratings are not a substitute for Enclosure Type ratings. [ 70: Table110.28]



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Organization: National Fire Protection Assoc

Street Address:

City:

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Zip:

Submittal Date: Tue Mar 29 08:51:28 EDT 2016

Committee Statement

CommitteeStatement:

Since the table in F.4 is exactly taken from Table 110.28 (enclosure selection) of NFPA 70 andextract tag was added in accordance with the manual of style.

ResponseMessage:


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First Revision No. 61-NFPA 79-2016 [ New Section after J.3 ]

J.4 Terms and Definitions Used in CEMA 110.

Control Architecture, Centralized. A control logic architecture in which all logic solving, sensory inputcollection, and actuator control is executed by a single controller and control panel. An example wouldbe a PLC control cabinet that contains a processor to solve logic, input modules for all sensor signals,and output modules for all actuator control signals. The input and output signals would be wired from thefield device to the PLC control cabinet.

Control Architecture, Distributed. A control logic architecture in which all logic, sensory input, andactuator control is solved, collected, and executed by more than one controller. An example would bemicrocontrollers located on every conveyor motor that contain a processor to solve logic, input modulesfor all sensors signals, and output modules for all actuator control signals. The input and output signalswould be wired from the field device to the microcontroller. Each microcontroller would solve logic andcommand actuators that are specific to the function of the conveyor. The coordination of all the motors(macro-commands) would be completed with intra-microcontroller communication and microcontrollercommunication with the machine supervisor control system.

Device Wiring Architecture, Discrete. A power and control distribution system architecture in whichall sensor and actuator signals are collected and delivered by directly wiring to/from the device and thecontroller. An example would be a binary sensor signal that would use one wire to communicate an “on”or “off” state based on the absence or presence of voltage with respect to a voltage reference that iscommon to the sensor and controller.

Device Wiring Architecture, Distributed. A power and control distribution system architecture inwhich all sensor and actuator signals are collected and delivered by network interface modules, whichthen interpret the sensor signals and convert them into a message to be transmitted to the controllerover a communication network. The complementary PLC sends a message to the actuator networkinterface, which converts the message to an output command for the actuator. An example would be asensor wire connected to a remote input module. The remote input module and controller would beconnected to an Ethernet network and would exchange data at a rate sufficient to properly control themachine.

Power Distribution Architecture, Dedicated. A power and control distribution system architecture inwhich each nominal voltage supply is distributed using a dedicated path and in which no overlap offunction or supply function is allowed. An example would be a 480 V ac supply to motors carried onwires or busbars, a supply to 24 V dc devices carried on wires or busbars, and communication networkscarried on dedicated cables.

Power Distribution Architecture, Multifunction. A system architecture in which voltage suppliesshare common pathways and overlap in function for power and communication distribution. Exampleswould include power over Ethernet (dc supply carried on ethernet cable) or Ethernet over power(Ethernet communications carried on high power conductors).




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Committee Statement


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CommitteeStatement:

Subtitles were capitalized for consistency. By adding a section with terms and definitions fromCEMA 110, users from this industry will have harmonization.

Independent of the CEMA harmonization, by adding a definition of the proposed, a reference fordocumentation clarification will be established. This will lead to future improvement and technologyin documentation that is not possible without establishing a standard definition.

ResponseMessage:

Public Input No. 87-NFPA 79-2015 [New Section after J.1]


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First Revision No. 62-NFPA 79-2016 [ Section No. J.3 ]


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J.3 Terms and Definitions Relating to Protective and Functional Bonding Used in IEC 60204-1, 6thEdition Relating to Protective and Functional Bonding Extracted from the Draft of the 2nd CD for the 6thEdition .


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Cable Trunking System. A system of enclosures comprised consisting of a base and a removable coverintended for the complete surrounding of insulated conductors, cables, and cords.

Discussion. Cable trunking is commonly used within enclosures to support and contain conductors.

Duct. An enclosed channel designed expressly for holding and protecting electrical conductors, cables,and busbars.

Equipotential Bonding. Provision of electric connections between conductive parts, intended to achieveequipotentiality.

[IEV IEC 195-1-10]

Discussion. Connecting conductive parts together minimizes voltage differences but by itself does notprovide an effective fault current path.

Exposed Conductive Part. Conductive part of electrical equipment, which can be touched and which isnot live under normal operating conditions, but which can become live under fault conditions.

[IEV IEC 826-12-10, modified]

Discussion. Often linked with “structural parts"; electrical parts that are not normally live generally do needto be bonded to the protective bonding circuit.

Extraneous Conductive Part. Conductive part not forming part of the electrical installation and liable tointroduce a potential, generally the earth potential.


NOTE: Examples of extraneous conductive parts can include ladders, handrails, pipes, machine parts,etc., that appear with this definition.

Discussion. Generally, the machine is considered an extraneous conductive part.

Fault Protection. Protection against electric shock under single-fault conditions.

[IEV IEC 195-06-02]

Discussion. Overcurrent protective devices and double insulation are types of fault protection.

Functional Bonding. Equipotential bonding necessary for proper functioning of electrical equipment.

Discussion. PLCs and drives generally do not need special bonding, and there are only a few devices thatneed separate “functional” bonding, such as some scales.

Live Part. Conductor or conductive part intended to be energized in normal use, including a neutralconductor, but, by convention, not a PEN conductor.

Discussion. PLCs and drives generally do not need special bonding, and there are only a few devicesthat need separate “functional” bonding, such as some scales.

NOTE: This term does not necessarily imply a risk of electric shock.

Neutral Conductor N. Conductor electrically connected to the neutral point of a system and capable ofcontributing to the distribution of electrical energy.


Plug/Socket Combination. Component and a suitable mating component, appropriate to terminateconductors, intended for connection or disconnection of two or more conductors.

NOTE: Examples of plug/socket combinations include:

– connectors which fulfill the requirements of IEC 61984

– a plug-and-socket-outlet, a cable coupler, or an appliance coupler in accordance with IEC 60309-1

– a plug-and-socket; outlet in accordance with IEC 60884-1 or an appliance coupler in accordance withIEC 608320-1

Protective Bonding. Equipotential bonding for protection against electric shock.

NOTE: Measures for protection against electric shock can also reduce the risk of burns or fire.

Discussion. The network of protective conductors, along with the necessary bonding jumpers, provide theprotective bonding, including the connection to the “main earthing terminal PE."

Protective Bonding Circuit. Protective conductors and conductive parts connected together to provide


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protection against electric shock in the event of an insulation failure.

Protective Conductor. Conductor required for protective bonding by some measures for protectionagainst electric shock for electrically connecting any of the following parts:

– exposed conductive parts;

– extraneous conductive parts;

– main earthing terminal (PE)





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Committee Statement

CommitteeStatement:

Annex J was revised to reflect the latest edition of IEC 60204-1 and make editorialcorrections.

Response Message:


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First Revision No. 64-NFPA 79-2016 [ Chapter K ]

Annex K Informational References

K.1 Referenced Publications.

The documents or portions thereof listed in this annex are referenced within the informational sections ofthis standard and are not part of the requirements of this document unless also listed in Chapter 2 forother reasons.

K.1.1 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.



NFPA 77, Recommended Practice on Static Electricity, 2014 edition.

K.1.2 Other Publications.

K.1.2.1 ANSI Publications.

American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.

ANSI B11.0, Safety of Machinery — General Requirements and Risk Assessment, 2010.

ANSI B11-TR4, Selection of Programmable Electronic Systems (PES/PLC) for Machine Tools, 2004.

ANSI B11-TR6, Safety Control Systems for Machine Tools, 2010.

ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .

K.1.2.2 EN CENELEC Publications.

CENELEC, European Committee for Electrotechnical Standardization (CENELEC), 35, Rue deStassartstraat, B-1050 , CENELEC Management Centre, Avenue Marnix 17, 4th floor, B - 1000 Brussels,Belgium . CENELEC Online Info Service: [email protected]

BS EN 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: Generalrequirements, 2006 + A1 2009 corrigendum, 2010 .

BS EN 61010-1, Safety requirements for electrical equipment for measurement, control, and laboratoryuse — Part 1: General requirements, 2010, corrigendum, 2011 .


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K.1.2.3 IEC Publications.


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International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,Switzerland.

IEC 60034-1 Ed. 12.0, Rotating electrical machines — Part 1: Rating and performance, 2010.

IEC 60072-1 Ed. 6.0, Dimensions and output series for rotating electrical machines — Part 1: Framenumbers 56 to 400 and flange numbers 55 to 1080, 1991.

IEC 60204-1 Ed. 5.1, Safety of machinery — Electrical equipment of machines — Part 1: Generalrequirements, 2009.

IEC 60332-1-1 Ed. 1.0 [Series] 1 , Tests on electric and optical fibre cables under fire conditions —Part 1-1 : Test on for vertical flame propagation for a single vertical insulated wire or cable apparatus ,2004 2015 .

IEC 60364-4-41 Ed. 5.0, Electrical installations of buildings — Part 4-41: Protection for safety —Protection against electric shock, 2005.

IEC 60364-5-53 Ed. 3.1 2 , Electrical Installations of Buildings buildings — Part 5-53: Selection andErection erection of Electrical electrical Equipment equipment — Isolation, Switching switching andControl control , 2006 2015 .

IEC 60417 DB [Database], Graphical symbols for use on equipment — Part 1: Overview and application,2002.

IEC 60529 Ed. 2.1 2 , Degrees of protection provided by enclosures (IP Code), 2001 2013, corrigendum2, 2015 .

IEC 60621-3 Ed. 1.0, Electrical installations for outdoor sites under heavy conditions (including open-castmines and quarries). — Part 3: General requirements for equipment and ancillaries, 1979. (withdrawn).

IEC 60742 Ed. 1.0, Isolating transformers and safety isolating transformers, 1983. (superseded by IEC61558-1).

IEC 60870-5-1 Ed. 1.0, Telecontrol equipment and systems. — Part 5: Transmission protocols —Section One: Transmission frame formats, 1990.

IEC 60947-4-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 4-1: Contactors and motor-starters— Electromechanical contactors and motor-starters, 2012.

IEC 60947-5-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices andswitching elements — Electromechanical control circuit devices, 2009.

IEC 60947-7-1 Ed. 3.0, Low-voltage switchgear and controlgear — Part 7-1 : Ancillary equipment —Section 1: Terminal blocks for copper conductors, 2009.

IEC 61010-1 Ed. 3.0, Safety requirements for electrical equipment for measurement, control, andlaboratory use — Part 1: General requirements, 2010.

IEC 61310-1 Ed. 2.0, Safety of machinery — indication Indication , marking and actuation — Part 1:Requirements for visual, auditory and tactile signals, 2007.

IEC 61310-3 Ed. 2.0, Safety of machinery — indication Indication , marking and actuation — Part 3:Requirements for the location and operation of actuators, 2007.

IEC 61508 Ed. 2.0, [Series] Functional safety of electrical/electronic/programmable electronic safety-related systems, 2010.

IEC 61558-1 Ed. 2.1, Safety of power transformers, power supply units and similar — Part 1: Generalrequirements and tests, 2009 2011 .

IEC 61800-5-2 Ed. 1.0, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements— Functional, 2007.

IEC 62061 Ed. 1.1 2 , Safety of machinery — Functional safety of electrical, electronic and programmablecontrol systems, 2012 2015, corrigendum 1, 2015 .

NOTE: The IEC publishes consolidated editions of its publications with all the amendments andcorrigenda included with the base document. For example:

Edition 1.0 is a base document without any amendments.

Edition 1.1 is the base 1.0 edition consolidated with one amendment.


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Edition 1.2 is the base 1.0 edition consolidated with two amendments.

Edition 2.0 is the second edition of a base document. This may include new information combined as wellas amendments from edition 1.x.

Edition 2.1 is the second edition of a document consolidated with amendment 1 to that edition.

Global FR-16

K.1.2.4 IEEE Publications.

Institute of Electrical and Electronics Engineers, Three IEEE, 3 Park Avenue, 17th Floor, New York, NY10016-5997.

IEEE 100 CD , The Authoritative Dictionary of IEEE Standard Terms , 7th edition, 2000 2013 .

ANSI Y32.2/IEEE 315 /315A , IEEE Graphic Symbols for Electrical and Electronics Diagrams (IncludingReference Designation Letters) , 1993.

IEEE 841, Standard for Petroleum and Chemical Industry — Premium-Efficiency, Severe-Duty, TotallyEnclosed Fan-Cooled (TEFC) Squirrel Squirrel Cage Induction Motors — up to and Up to and Including370 kW ( 500 hp ) , 1994 2009 .

K.1.2.5 ISO Publications.

International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56, CH-1211Geneva 20, ISO Central Secretariat, BIBC II, 8, Chemin de Blandonnet, CP 401, 1214 Vernier, Geneva,Switzerland.

ISO 7000, Graphical symbols for use on equipment — Index and synopsis , 2012 Registered symbols ,2014 .

ISO 12100, Safety of machinery — Basic concepts, general General principles for design — Part 1: Basicterminology, methodology Risk assessment and risk reduction , 2010.

ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principlesfor design, 2006, corrigendum 1, 2009 .

ISO 13849-2, Safety of machinery — Safety-related parts of control systems — Part 2: Validation, 2012.

ISO 13850, Safety of machinery — Emergency stop function — Principles for design, 2006 2015 .

K.1.2.6 NEMA Publications.

National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , Rosslyn Arlington ,VA 22209.

NEMA MG-1, Motors and Generators, 2003 2014 .

NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .

K.1.2.7 SEMI Publications.

Semiconductor Equipment and Materials International, 3081 Zanker Road, San Jose, CA 95134.

SEMI S2, Environmental, Health, and Safety Guideline for Semiconductor Manufacturing Equipment,2003 2010 .

SEMI S9, Safety Guideline for Electrical Design Verification Tests for Semiconductor ManufacturingEquipment, 2001. (withdrawn 2007).

SEMI S22, Safety Guideline for the Electrical Design of Semiconductor Manufacturing Equipment,2006 2010 .


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K.1.2.8 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

ANSI/ UL 50, Standard for Enclosures for Electrical Equipment, 2007, revised 2015 .

ANSI/ UL 62, Standard for Flexible Cord and Fixture Wire, 2010, revised 2014 .

ANSI/ UL 248-14, Standard for Low-Voltage Fuses — Part 14: Supplemental Fuses, 2000,Revised revised 2010 2015 .

ANSI/ UL 489, Standard for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-BreakerEnclosures, 2009, revised 2014 .

ANSI/ UL 498, Standard for Attachment Plugs and Receptacles, 2001 2012 , Revised revised 2009 2014 .

ANSI/ UL 508, Standard for Industrial Control Equipment, 1999, Revised revised 2010 2013 .

UL 508A, Standard for Industrial Control Panels, 2001, Revised revised 2010 2014 .

ANSI/ UL 651, Standard for Schedule 40 and 80 Rigid , EB and A Rigid PVC Conduit and Fittings ,2005 2011 , Revised revised 2008 2014 .

ANSI/ UL 758, Appliance Wiring Material, 2006 2014 , Revised revised 2009 2014 .

ANSI/ UL 1004-1, Standard for Rotating Electrical Machines, 2008 2012 , Revised revised 2011 2015 .

ANSI/ UL 1077, Standard for Supplementary Protectors for Use in Electrical Equipment, 2005,Revised revised 2010 2015 .

ANSI/ UL 1682, Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type,2007 2013,revised 2013 .

ANSI/ UL 60950-1, Information Technology Equipment — Part I: General Requirements, 2007,Revised revised 2011 2014 .

UL Subject 2237 Outline , Outline of Investigation for Multi-Point Interconnection Power Cable Assembliesfor Industrial Machinery, 2011 2015 .

IEC/UL 61010A-1 UL 61010 , Electrical Equipment for Measurement, Control and Laboratory Use —Part 1: General Requirements, 2002 2014 .

UL 61010-1, UL Standard for Safety Electrical Equipment For Measurement, Control, and LaboratoryUse — Part 1: General Requirements , 2004, revised 2015.

K.2 Informational References.

The following documents or portions thereof are listed here as informational resources only. They are nota part of the recommendations requirements of this document.

DOE-HDBK-1003-96, Guide to Good Practices for Training and Qualification of Maintenance Personnel ,1996.

IEC 61346-2 81346-2 , Industrial systems, installations and equipment and industrial products —Structuring principles and reference designations — Part 2: Classification of objects and codes forclasses2000-04 2009 (supersedes IEC 61346-2) .

IEC 61558-2-6, Safety of power transformers, power supply units and similar — Part 2: Particularrequirements for isolating transformers for general use of transformers, reactors, power supply units andsimilar products for supply voltages up to 1100 V — Part 2-6: Particular requirements and tests for safetyisolating transformers and power supply units incorporating safety isolating transformers , 1997-03 2009 .

ISO 5457, Technical product documentation — Sizes and layout of drawing sheets, 1999, amendment 1,2010 .

ISO 7200, Technical product documentation — Data fields in title blocks and document headers, 2004.

K.3 References for Extracts in Informational Sections.




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Committee Statement

CommitteeStatement:

The references have been updated to appropriate editions.

This DOE handbook gives guidance to industrial management when qualifying electricalmaintenance workers to germane job tasks. It is presently used as a guide to all DOE projectsand suggested by OSHA as a guide.

ResponseMessage:

Public Input No. 115-NFPA 79-2016 [Section No. K.1.2.8]

Public Input No. 2-NFPA 79-2015 [Chapter K]


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