National Fire Protection Association Report · Subject: NEC First Draft TC FINAL Ballot Results...

National Fire Protection Association 1 Batterymarch Park, Quincy, MA 02169-7471 Phone: 617-770-3000 • Fax: 617-770-0700 • www.nfpa.org

M E M O R A N D U M

To: NEC Code-Making Panel 8

From: Kimberly Shea, Project Administrator

Date: April 16, 2015

Subject: NEC First Draft TC FINAL Ballot Results (A2016)

According to the final ballot results, all First Revisions received the necessary affirmative votes to pass ballot. 13 Members Eligible to Vote on Articles 225, 230 0 Members Ballots Not Returned 4 Members voted Affirmative with Comment on one or more Revisions (Allen, Campbell, Loyd,

West) 1 Members voted Negative on one or more Revisions (Offerdahl) 0 Abstentions on one or more Revisions

The attached report shows the number of affirmative, negative, and abstaining votes as well as the explanation of the vote for each first/second revision. There are two criteria necessary for each first/second revision to pass ballot: (1) simple majority and (2) affirmative 2/3 vote. The mock examples below show how the calculations are determined. (1) Example for Simple Majority: Assuming there are 20 vote eligible committee members, 11 affirmative

votes are required to pass ballot. (Sample calculation: 20 members eligible to vote ÷ 2 = 10 + 1 = 11) (2) Example for Affirmative 2/3: Assuming there are 20 vote eligible committee members and 1 member did

not return their ballot and 2 members abstained, the number of affirmative votes required would be 12. (Sample calculation: 20 members eligble to vote – 1 not returned – 2 abstentions = 17 x 0.66 = 11.22 = 12 )

As always please feel free to contact me if you have any questions.

First Revision No. 2128-NFPA 70-2015 [ Global Input ]

Annex C

1. Reorder existing Tables, as follows:

(1) C.5 becomes C.6

(2) C.5(A) becomes C.6(A)

(3) C.6 becomes C.5

(4) C.6(A) becomes C.5(A)

2. Insert new Tables C.7 and C.7(A), per attached, and renumber existing C.7 through C.12(A).

3. Update Table of Contents at beginning of Annex C.

Supplemental Information

File Name Description

Table_C.7_2128_BC.docx

Table_C.7.A_2128_BC.docx

FR_2128_Table_C.7_edited.docx

FR_2128_Table_C.7A_edited.docx

Submitter Information Verification

Submitter Full Name: CMP 8

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Mon Jan 19 17:18:18 EST 2015

Committee Statement

CommitteeStatement:

Existing tables for LFNC-A and LFNC-B have been re-ordered, alphabetically.

The new Table C.7 and Table C.7(A) identify fills for LFNC-C to Annex C for both concentricallystranded conductors and compact conductors.

ResponseMessage:

Public Input No. 1069-NFPA 70-2014 [Annex C]

Public Input No. 1071-NFPA 70-2014 [Annex C]

Ballot Results

This item has passed ballot

13 Eligible Voters

0 Not Returned

12 Affirmative All

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

1 of 172 4/15/2015 4:32 PM

1 Affirmative with Comments

0 Negative with Comments

0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.

Gerstetter, David A.

Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Offerdahl, Donald R.

Roe, Rhett A.

West, Rodney J.

Affirmative with Comment

Allen, David F.

The new Table C.7 and Table C.7(A) identify fills for LFNC-C to Annex C for both concentrically strandedconductors and compact conductors.


2 of 172 4/15/2015 4:32 PM

First Revision No. 2147-NFPA 70-2015 [ Definition: Raceway. ]

Raceway.

An enclosed channel of metallic or nonmetallic materials designed expressly for holding wires, cables, orbusbars, with additional functions as permitted in this Code.

Informational Note: A raceway is identified within specific article definitions.




Street Address:

City:

State:

Zip:

Submittal Date: Tue Jan 20 10:47:09 EST 2015

Committee Statement

Committee Statement: The words "of metallic or nonmetallic materials" did not add clarity to the definition.

Response Message:

Public Input No. 2124-NFPA 70-2014 [Definition: Raceway.]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



3 of 172 4/15/2015 4:32 PM

Allen, David F.

The words "of metallic or nonmetallic materials" did not add clarity to the definition.


4 of 172 4/15/2015 4:32 PM

First Revision No. 2119-NFPA 70-2015 [ Section No. 342.6 ]

342.6 Listing Requirements.

IMC, factory elbows and couplings, and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Listed products are labeled as defined in Article 100 "Labeled". Some Listed products aremarked or require markings on the smallest shipping package.

ResponseMessage:

Public Input No. 888-NFPA 70-2014 [Section No. 342.6]

Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


5 of 172 4/15/2015 4:32 PM

Listed products are labeled as defined in Article 100 "Labeled". Some Listed products are marked or requiremarkings on the smallest shipping package.

Negative with Comment


A requirement that all listed equipment be labeled with the listing organization’s mark of conformity conflicts withthe definition of Listed in Article 100, including the Informational Note saying, “Use of the system employed by thelisting organization allows the authority having jurisdiction to identify a listed product.” The definition is not only theNEC definition of Listed, it is an Official NFPA Definition, including the Informational Note (or an Appendix note inmany NFPA standards). It is not for CMP 8 to decide to override an official definition. In addition, it is inappropriatefor the NEC Committee to dictate certification practices to listing organizations. By requiring that listed equipmentdisplay the listing organization’s mark, CMP 8 would be dictating the business practices of the various listingorganizations without a clear statement of need, against the advice contained in the Informational Note to thedefinition.


6 of 172 4/15/2015 4:32 PM

First Revision No. 2120-NFPA 70-2015 [ Section No. 342.10(B) ]

(B) Corrosion Environments.

IMC, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with theearth, or in areas subject to severe corrosive influences where protected by corrosion protection andjudged suitable approved for the condition.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Approved is defined in Article 100 and this change will clarify when supplementary corrosionprotection needs to be applied and is acceptable.

ResponseMessage:

Public Input No. 1203-NFPA 70-2014 [Section No. 342.10(B)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


7 of 172 4/15/2015 4:32 PM


Allen, David F.

Approved is defined in Article 100 and this change will clarify when supplementary corrosion protection needs tobe applied and is acceptable.


8 of 172 4/15/2015 4:32 PM

First Revision No. 2121-NFPA 70-2015 [ Section No. 342.10(C) ]

(C) Cinder Fill.

IMC shall be permitted to be installed in or under cinder fill where subject to permanent moisture whereprotected on all sides by a layer of noncinder concrete not less than 50 mm (2 in.) thick; where the conduitis not less than 450 mm (18 in.) under the fill; or where protected by corrosion protection and judgedsuitable approved for the condition.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Approved is defined in Article 100 and this change will clarify when supplementary corrosionprotection needs to be applied and is acceptable.

ResponseMessage:

Public Input No. 1204-NFPA 70-2014 [Section No. 342.10(C)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


9 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

change will clarify when supplementary corrosion protection needs to be applied and is acceptable.


10 of 172 4/15/2015 4:32 PM


342.14 Dissimilar Metals.

Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate thepossibility of galvanic action.

Aluminum fittings and enclosures shall be permitted to be used with galvanized steel IMC where notsubject to severe corrosive influences. Stainless steel IMC shall only be used with stainless steel fittingsand approved accessories, outlet boxes, and enclosures .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the acceptable fittings that can be used with galvanized and stainlesssteel IMC, based on galvanic compatibility.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



11 of 172 4/15/2015 4:32 PM

Roe, Rhett A.

West, Rodney J.


Allen, David F.

clarifies the acceptable fittings that can be used with galvanized and stainless steel IMC, based on galvaniccompatibility.


12 of 172 4/15/2015 4:32 PM


(B) Supports.

IMC shall be supported in accordance with one of the following:

(1) Conduit shall be supported at intervals not exceeding 3 m (10 ft).

(2) The distance between supports for straight runs of conduit shall be permitted in accordance withTable 344.30(B)(2), provided the conduit is made up with threaded couplings and such supportsthat prevent transmission of stresses to termination where conduit is deflected between supports.

(3) Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to besupported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings,the conduit is supported and securely fastened at the top and bottom of the riser, and no othermeans of intermediate support is readily available.

(4) Horizontal runs of IMC supported by openings through framing members at intervals not exceeding 3m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: This is an editorial change that improves clarity.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete


13 of 172 4/15/2015 4:32 PM

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

improves clarity.


14 of 172 4/15/2015 4:32 PM

First Revision No. 2131-NFPA 70-2015 [ New Section after 342.60 ]

342.100 Construction.

IMC shall be made of one of the following:

(1) Steel, with protective coatings

(2) Stainless steel




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Stainless steel has been added to the IMC Standard, UL 1242, and is added in Article342.

Response Message:

Public Input No. 2874-NFPA 70-2014 [New Section after 342.60]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


15 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

Stainless steel has been added to the IMC Standard, UL 1242, and is added in Article 342.


16 of 172 4/15/2015 4:32 PM


342.120 Marking.

Each length shall be clearly and durably marked at least every 1.5 m (5 ft) with the letters IMC. Eachlength shall be marked as required in the first sentence of 110.21 110.21(A) .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision corrects the reference to 110.21(A) and adds additional text to be consistent with344.120 for manufacturers markings requirements for IMC.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


17 of 172 4/15/2015 4:32 PM


Allen, David F.

This revision corrects the reference to 110.21(A) and adds additional text to be consistent with 344.120 formanufacturers markings requirements for IMC.


18 of 172 4/15/2015 4:32 PM



RMC, factory elbows and couplings, and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


19 of 172 4/15/2015 4:32 PM

Listed products are labeled as defined in Article 100 "Labeled".





20 of 172 4/15/2015 4:32 PM

First Revision No. 2134-NFPA 70-2015 [ Section No. 344.10(A)(3) ]

(3) Aluminum RMC.

Aluminum RMC shall be permitted to be installed where judged suitable approved for the environment.Rigid aluminum conduit encased in concrete or in direct contact with the earth shall be provided withapproved supplementary corrosion protection.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

"Approved" is defined in Article 100 and is enforceable. "Judged Suitable" is not enforceableand is difficult to interpret.

ResponseMessage:

Public Input No. 1200-NFPA 70-2014 [Section No. 344.10(A)(3)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


21 of 172 4/15/2015 4:32 PM


Allen, David F.

"Approved" is defined in Article 100 and is enforceable


22 of 172 4/15/2015 4:32 PM

First Revision No. 2135-NFPA 70-2015 [ Section No. 344.10(B)(1) ]

(1) Galvanized Steel, Stainless Steel, and Red Brass RMC, Elbows, Couplings, and Fittings.

Galvanized steel, stainless steel, and red brass RMC elbows, couplings, and fittings shall be permitted tobe installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influenceswhere protected by corrosion protection and judged suitable approved for the condition.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:

Public Input No. 1201-NFPA 70-2014 [Section No. 344.10(B)(1)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


23 of 172 4/15/2015 4:32 PM


Allen, David F.

"Approved" is defined in Article 100 and is enforceable


24 of 172 4/15/2015 4:32 PM


(C) Cinder Fill.

Galvanized steel, stainless steel, and red brass RMC shall be permitted to be installed in or under cinderfill where subject to permanent moisture where protected on all sides by a layer of noncinder concrete notless than 50 mm (2 in.) thick; where the conduit is not less than 450 mm (18 in.) under the fill; or whereprotected by corrosion protection and judged suitable approved for the condition.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


25 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

"Approved" is defined in Article 100 and is enforceable.


26 of 172 4/15/2015 4:32 PM



Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate thepossibility of galvanic action. Aluminum fittings and enclosures shall be permitted to be used withgalvanized steel RMC, and galvanized steel fittings and enclosures shall be permitted to be used withaluminum RMC where not subject to severe corrosive influences. Stainless steel RMC shall only be usedwith stainless steel fittings and approved accessories, outlet boxes, and enclosures.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the acceptable fittings that can be used with different types of RMC,based on galvanic compatibility.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


27 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

This revision clarifies the acceptable fittings that can be used with different types of RMC, based on galvaniccompatibility.


28 of 172 4/15/2015 4:32 PM


(B) Supports.

RMC shall be supported in accordance with one of the following:

(1) Conduit shall be supported at intervals not exceeding 3 m (10 ft).

(2) The distance between supports for straight runs of conduit shall be permitted in accordance withTable 344.30(B)(2), provided the conduit is made up with threaded couplings and such supportsthat prevent transmission of stresses to termination where conduit is deflected between supports.

(3) Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to besupported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings,the conduit is supported and securely fastened at the top and bottom of the riser, and no othermeans of intermediate support is readily available.

(4) Horizontal runs of RMC supported by openings through framing members at intervals not exceeding3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.

Table 344.30(B)(2) Supports for Rigid Metal Conduit

Conduit Size Maximum Distance Between Rigid Metal Conduit Supports

Metric Designator Trade Size m ft

16–21 1⁄2–3⁄4 3.0 10

27 1 3.7 12

35–41 11⁄4–11⁄2 4.3 14

53–63 2–21⁄2 4.9 16

78 and larger 3 and larger 6.1 20




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: This is an editorial change that improves clarity.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All


29 of 172 4/15/2015 4:32 PM



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

improves clarity


30 of 172 4/15/2015 4:32 PM



RMC shall be made of one of the following:

(1) Steel (ferrous), with or without protective coatings

(2) Aluminum (nonferrous)

(3) Red brass

(4) Stainless steel




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the metal types used for the manufacture of RMC. RMC withoutprotective coatings was removed because it is not covered in the listing UL 6.

ResponseMessage:



Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.


31 of 172 4/15/2015 4:32 PM

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

clarifies the metal types used for the manufacture of RMC.


32 of 172 4/15/2015 4:32 PM



FMC and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


33 of 172 4/15/2015 4:32 PM






34 of 172 4/15/2015 4:32 PM

First Revision No. 2166-NFPA 70-2015 [ Section No. 348.30(A) ]

(A) Securely Fastened.

FMC shall be securely fastened in place by an approved means within 300 mm (12 in.) of each box,cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not toexceed 1.4 m (41⁄2 ft). Where used, cable ties shall be listed and be identified for securement and support.

Exception No. 1: Where FMC is fished between access points through concealed spaces in finishedbuildings or structures and supporting is impracticable.

Exception No. 2: Where flexibility is necessary after installation, lengths from the last point where theraceway is securely fastened shall not exceed the following:

(1) 900 mm (3 ft) for metric designators 16 through 35 (trade sizes 1⁄2 through 11⁄4)

(2) 1200 mm (4 ft) for metric designators 41 through 53 (trade sizes 11⁄2 through 2)

(3) 1500 mm (5 ft) for metric designators 63 (trade size 21⁄2) and larger

Exception No. 3: Lengths not exceeding 1.8 m (6 ft) from a luminaire terminal connection for tapconnections to luminaires as permitted in410.117(C).

Exception No. 4: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securelyfastened for connections within an accessible ceiling to a luminaire(s) or other equipment. For thepurposes of this exception, listed flexible metal conduit fittings shall be permitted as a means ofsecurement and support.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Section 348.30(A) requires that flexible metal conduit be both secured and supported at prescribeddistances.

Securing a raceway may be different than supporting the raceway. Exception 4 directs that a listedfitting may be used to support the raceway however this exception does not address the issue ofsecurement. A strict reading of exception 4 would allow the listed fitting to provide the supportrequired by this section however the fitting would not provide the securement also required by thissection. This input would allow the listed fitting to provide both securement and support whichappears to be the panel's intent.

Cable ties have long been among the “approved means” for securing and supporting flexible metalconduit. Listing of cable ties approved for support of flexible conduits and cables is appropriate asthe standard requires markings that identify critical performance ranges that can impact theirsuitability for use, including minimum and maximum operating temperature and resistance toultraviolet light for outdoor installations. The proposed new requirements will provide for objectivedetermination for suitability of cable ties for this use.

ResponseMessage:


35 of 172 4/15/2015 4:32 PM

Public Input No. 109-NFPA 70-2014 [Section No. 348.30(A)]


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

flexible metal conduit be both secured and supported at prescribed distances.


36 of 172 4/15/2015 4:32 PM



LFMC and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


37 of 172 4/15/2015 4:32 PM

Listed products are labeled as defined in Article 100 "Labeled





38 of 172 4/15/2015 4:32 PM


350.10 Uses Permitted.

LFMC shall be permitted to be used in exposed or concealed locations as follows:

(1) Where conditions of installation, operation, or maintenance require flexibility or protection fromliquids, vapors, or solids

(2) As permitted by 501.10(B) , 502.10 , 503.10 , and 504.20 and in other In hazardous (classified)locations where specifically approved, and by 553.7(B) permitted by Chapter 5

(3) For direct burial where listed and marked for the purpose




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The specific references were removed and replaced with a general reference to Chapter 5.The reference to 553.7(B) was not necessary.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.


39 of 172 4/15/2015 4:32 PM

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

The specific references were removed and replaced with a general reference to Chapter 5.


40 of 172 4/15/2015 4:32 PM


350.28 Trimming.

All cut ends of conduit shall be trimmed inside and outside to remove rough edges.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision provides consistency between Article 350 Liquidtight Flexible metal Conduit: TypeLFMC and article Article 356 Liquidtight Flexible Nonmetallic Conduit: Type LFNC, wheretrimming is addressed in 356.28.

Properly trimming of LFMC is necessary as to allow the proper installation of the steel groundingferrule which is important to maintain ground continuity of the steel sheath.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



41 of 172 4/15/2015 4:32 PM

Roe, Rhett A.

West, Rodney J.


Allen, David F.

This revision provides consistency


42 of 172 4/15/2015 4:32 PM



LFMC shall be securely fastened in place by an approved means within 300 mm (12 in.) of each box,cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not toexceed 1.4 m (41⁄2 ft). Where used, cable ties shall be listed and be identified for securement and support.

Exception No. 1: Where LFMC is fished between access points through concealed spaces in finishedbuildings or structures and supporting is impractical.

Exception No. 2: Where flexibility is necessary after installation, lengths from the last point where theraceway is securely fastened shall not exceed the following:

(1) 900 mm (3 ft) for metric designators 16 through 35 (trade sizes 1⁄2 through 11⁄4)

(2) 1200 mm (4 ft) for metric designators 41 through 53 (trade sizes 11⁄2 through 2)

(3) 1500 mm (5 ft) for metric designators 63 (trade size 21⁄2) and larger

Exception No. 3: Lengths not exceeding 1.8 m (6 ft) from a luminaire terminal connection for tapconductors to luminaires, as permitted in 410.117(C).

Exception No. 4: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securelyfastened for connections within an accessible ceiling to luminaire(s) or other equipment. For thepurposes of 350.30, listed LFMC fittings shall be permitted as a means of securement and support.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Section 350.30(A) requires that LFMC be both secured and supported at prescribed distances.Securing a raceway may be different than supporting the raceway. Exception 4 directs that a listedfitting may be used to support the raceway however this exception does not address the issue ofsecurement. A strict reading of exception 4 would allow the listed fitting to provide the supportrequired by this section however the fitting would not provide the securement also required by thissection.

Cable ties have long been among the “approved means” for securing and supporting flexible metalconduit. Listing of cable ties approved for support of flexible conduits and cables is appropriate asthe standard requires markings that identify critical performance ranges that can impact theirsuitability for use, including minimum and maximum operating temperature and resistance toultraviolet light for outdoor installations. The proposed new requirements will provide for objectivedetermination for suitability of cable ties for this use.

ResponseMessage:



Ballot Results


43 of 172 4/15/2015 4:32 PM


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Section 350.30(A) requires that LFMC be both secured and supported at prescribed distances. Securing araceway may be different than supporting the raceway. Exception 4 directs that a listed fitting may be used tosupport the raceway however this exception does not address the issue of securement. A strict reading ofexception 4 would allow the listed fitting to provide the support required by this section however the fitting wouldnot provide the securement also required by this section.


44 of 172 4/15/2015 4:32 PM



PVC conduit, factory elbows, and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


45 of 172 4/15/2015 4:32 PM






46 of 172 4/15/2015 4:32 PM



HDPE conduit and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


47 of 172 4/15/2015 4:32 PM






48 of 172 4/15/2015 4:32 PM



NUCC and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


49 of 172 4/15/2015 4:32 PM






50 of 172 4/15/2015 4:32 PM



RTRC, factory elbows, and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:



Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.



51 of 172 4/15/2015 4:32 PM





52 of 172 4/15/2015 4:32 PM


(A) Hazardous (Classified) Locations.

(1) In any hazardous (classified) location, except as permitted by other articles in this Code

(2) In Class I, Division 2 locations, except as permitted in 501.10(B)(3) 501.10(B)(1) (6)




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: The cross-reference was updated.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



53 of 172 4/15/2015 4:32 PM

Allen, David F.

cross-reference was updated.


54 of 172 4/15/2015 4:32 PM



LFNC and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


55 of 172 4/15/2015 4:32 PM






56 of 172 4/15/2015 4:32 PM



LFNC shall be permitted to be used in exposed or concealed locations for the following purposes:

Informational Note: Extreme cold may can cause some types of nonmetallic conduits to becomebrittle and therefore more susceptible to damage from physical contact.

(1) Where flexibility is required for installation, operation, or maintenance.

(2) Where protection of the contained conductors is required from vapors, liquids, or solids.

(3) For outdoor locations where listed and marked as suitable for the purpose.

(4) For direct burial where listed and marked for the purpose.

(5) Type LFNC-B LFNC shall be permitted to be installed in lengths longer than 1.8 m (6 ft) wheresecured in accordance with 356.30.

(6) Type LFNC-B as a listed manufactured prewired assembly, metric designator 16 through 27 (tradesize 1⁄2 through 1) conduit.

(7) For encasement in concrete where listed for direct burial and installed in compliance with 356.42.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

All types of LFNC are listed to UL1660 and are identified for conditions of use for lengthslonger than 6 ft in all applications.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.


57 of 172 4/15/2015 4:32 PM

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

All types of LFNC are listed to UL1660 and are identified for conditions of use for lengths longer than 6 ft in allapplications.


58 of 172 4/15/2015 4:32 PM


356.12 Uses Not Permitted.

LFNC shall not be used as follows:

(1) Where subject to physical damage

(2) Where any combination of ambient and conductor temperatures is in excess of that for which theLFNC it is approved listed

(3) In lengths longer than 1.8 m (6 ft), except as permitted by 356.10(5) or where a longer length isapproved as essential for a required degree of flexibility





Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: The listing defines temperature ratings for the conduit.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.


59 of 172 4/15/2015 4:32 PM

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

The listing defines temperature ratings for the conduit.


60 of 172 4/15/2015 4:32 PM


356.30 Securing and Supporting.

Type LFNC-B LFNC shall be securely fastened and supported in accordance with one of the following:

(1) Where installed in lengths exceeding 1.8 m (6 ft), the conduit shall be securely fastened at intervalsnot exceeding 900 mm (3 ft) and within 300 mm (12 in.) on each side of every outlet box, junctionbox, cabinet, or fitting. Where used, cable ties shall be listed as suitable for the application and forsecuring and supporting.

(2) Securing or supporting of the conduit shall not be required where it is fished, installed in lengths notexceeding 900 mm (3 ft) at terminals where flexibility is required, or installed in lengths not exceeding1.8 m (6 ft) from a luminaire terminal connection for tap conductors to luminaires permitted in410.117(C).

(3) Horizontal runs of LFNC supported by openings through framing members at intervals not exceeding900 mm (3 ft) and securely fastened within 300 mm (12 in.) of termination points shall be permitted.

(4) Securing or supporting of LFNC-B LFNC shall not be required where installed in lengths notexceeding 1.8 m (6 ft) from the last point where the raceway is securely fastened for connectionswithin an accessible ceiling to a luminaire(s) or other equipment. For the purpose of 356.30, listedliquidtight flexible nonmetallic conduit fittings shall be permitted as a means of support.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

All types of LFNC are listed to UL1660. UL 62275 establishes a system classification of cableties intended for support of flexible conduit.

ResponseMessage:



Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention


61 of 172 4/15/2015 4:32 PM

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

All types of LFNC are listed to UL1660. UL 62275 establishes a system classification of cable ties intended forsupport of flexible conduit.


62 of 172 4/15/2015 4:32 PM

First Revision No. 2140-NFPA 70-2015 [ Definition: Electrical Metallic Tubing (EMT). ]

Electrical Metallic Tubing (EMT).

An unthreaded thinwall raceway of circular cross section designed for the physical protection and routingof conductors and cables and for use as an equipment grounding conductor when installed utilizingappropriate fittings. EMT is generally made of steel (ferrous) with protective coatings or aluminum(nonferrous).




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Deleted text is now located appropriately in 358.100, listing metals used in themanufacture of EMT.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


63 of 172 4/15/2015 4:32 PM


Allen, David F.

Deleted text is now located appropriately in 358.100, listing metals used in the manufacture of EMT.


64 of 172 4/15/2015 4:32 PM



EMT, factory elbows, and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


65 of 172 4/15/2015 4:32 PM






66 of 172 4/15/2015 4:32 PM



(A) Exposed and Concealed.

The use of EMT shall be permitted for both exposed and concealed work. for the following:

(1) In concrete, in direct contact with the earth or in areas subject to severe corrosive influences whereinstalled in accordance with 358.10(B)

(2) In wet locations

(3) In any hazardous (classified) location as permitted by other articles in this Code

(B) Corrosion Protection Corrosive Environments .

(1) Galvanized Steel and Stainless Steel EMT, Elbows, and Fittings.

Ferrous or nonferrous Galvanized steel and stainless steel EMT, elbows, couplings, and fittings shall bepermitted to be installed in concrete, in direct contact with the earth, or in areas subject to severecorrosive influences where protected by corrosion protection and approved as suitable for the condition.

(2) Supplementary Protection of Aluminum EMT.

Aluminum EMT shall be provided with approved supplementary corrosion protection where encased inconcrete or in direct contact with the earth.

(C) Cinder Fill.

Galvanized steel and stainless steel EMT shall be permitted to be installed in cinder concrete or cinderfill where subject to permanent moisture when protected on all sides by a layer of noncinder concrete atleast 50 mm (2 in.) thick or when the tubing is installed at least 450 mm (18 in.) under the fill.

(D) Wet Locations.

All supports, bolts, straps, screws, and so forth shall be of corrosion-resistant materials or protectedagainst corrosion by corrosion-resistant materials.

Informational Note: See 300.6 for protection against corrosion.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Section 358.10 was revised for consistency. Requirements were moved from 358.12 andreworded using positive language. Also included is Stainless Steel EMT which is listed to UL797.

ResponseMessage:


Ballot Results


13 Eligible Voters


67 of 172 4/15/2015 4:32 PM

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Section 358.10 was revised for consistency. Requirements were moved from 358.12 and reworded using positivelanguage. Also included is Stainless Steel EMT which is listed to UL797.


68 of 172 4/15/2015 4:32 PM



Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate thepossibility of galvanic action. Aluminum fittings and enclosures shall be permitted to be used withgalvanized steel EMT, and galvanized steel fittings and enclosures shall be permitted to be used withaluminum EMT where not subject to severe corrosive influences. Stainless steel EMT shall only be usedwith stainless steel fittings and approved accessories, outlet boxes, and enclosures.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the acceptable fittings that can be used with different types of EMT,based on galvanic compatibility.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


69 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

clarifies the acceptable fittings that can be used with different types of EMT, based on galvanic compatibility.


70 of 172 4/15/2015 4:32 PM



EMT shall not be used under the following conditions:

(1) Where, during installation or afterward, it will be subject to severe physical damage.

(1) Where protected from corrosion solely by enamel.

(1) In cinder concrete or cinder fill where subject to permanent moisture unless protected on all sides bya layer of noncinder concrete at least 50 mm (2 in.) thick or unless the tubing is at least 450 mm (18in.) under the fill.

(1) In any hazardous (classified) location except as permitted by other articles in this Code .

(2) For the support of luminaires or other equipment except conduit bodies no larger than the largesttrade size of the tubing.

(2) Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminatethe possibility of galvanic action.

Exception: Aluminum fittings and enclosures shall be permitted to be used with steel EMT where notsubject to severe corrosive influences.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Revised 358.12(1) to delete the text: "during installation or afterwards". All electrical equipment issubject to all types of physical damage during the installation. "Start-Ups" and inspections insurethat all equipment and wiring methods are in working condition.

358.12(3) and (4) have been moved to 358.10 and changed to positive text.

ResponseMessage:




Ballot Results


13 Eligible Voters

0 Not Returned

10 Affirmative All



71 of 172 4/15/2015 4:32 PM


0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Myers, Paul W.


Roe, Rhett A.


Allen, David F.

delete the text: "during installation or afterwards". All electrical equipment is subject to all types of physicaldamage during the installation. "Start-Ups" and inspections insure that all equipment and wiring methods are inworking condition.

Loyd, Richard E.

I agree with Mr. West, The information on dissimilar metals in (6) should have been deleted. This material is nowcovered in new 358.14 Dissimilar Metals as shown in FR 2142.

West, Rodney J.

The information on dissimilar metals in (6) should be deleted. This material is now covered in new 358.14Dissimilar Metals as shown in FR 2142.


72 of 172 4/15/2015 4:32 PM



Factory-threaded integral couplings shall be permitted. Where EMT with a threaded integral coupling isused, threads for both the tubing and coupling shall be factory-made. The coupling and EMT threadsshall be designed so as to prevent bending of the tubing at any part of the thread. made of one of thefollowing:

(1) Steel with protective coatings

(2) Aluminum

(3) Stainless steel




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the metal types used for the manufacture of EMT. EMT is notthreaded.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.


73 of 172 4/15/2015 4:32 PM

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

This revision clarifies the metal types used for the manufacture of EMT. EMT is not threaded.


74 of 172 4/15/2015 4:32 PM

First Revision No. 2117-NFPA 70-2015 [ Definition: Flexible Metallic Tubing (FMT). ]

Flexible Metallic Tubing (FMT).

A metal raceway that is circular in cross section, flexible, metallic, and liquidtight without a nonmetallicjacket.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Metal should be used, instead of Metallic, when describing materials per the NEC StyleManual.

Response Message:

Public Input No. 655-NFPA 70-2014 [Definition: Flexible Metallic Tubing (FMT).]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



75 of 172 4/15/2015 4:32 PM

Allen, David F.

Metal should be used, instead of Metallic, when describing materials per the NEC Style Manual.


76 of 172 4/15/2015 4:32 PM



FMT and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


77 of 172 4/15/2015 4:32 PM






78 of 172 4/15/2015 4:32 PM



ENT and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


79 of 172 4/15/2015 4:32 PM






80 of 172 4/15/2015 4:32 PM



ENT shall not be used in the following:


(2) For the support of luminaires and other equipment

(3) Where subject to ambient temperatures in excess of 50°C (122°F) unless listed otherwise

(4) For direct earth burial

(4) Where the voltage is over 600 volts

(5) In exposed locations, except as permitted by 362.10(1), 362.10(5), and 362.10(7)

(6) In theaters and similar locations, except as provided in 518.4 and 520.5

(7) Where exposed to the direct rays of the sun, unless identified as sunlight resistant

(8) Where subject to physical damage




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

ENT is not limited by the voltage but is limited by the maximum conductor operation temperaturefor which the ENT is Listed for per 362.10(9). ENT can be used for 2000 volts as long as themaximum conductor operation temperature for which the ENT is Listed.

ResponseMessage:



Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All


81 of 172 4/15/2015 4:32 PM

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

ENT is not limited by the voltage but is limited by the maximum conductor operation temperature for which theENT is Listed for per 362.10(9). ENT can be used for 2000 volts as long as the maximum conductor operationtemperature for which the ENT is Listed.


82 of 172 4/15/2015 4:32 PM


(B) Maximum.

ENT larger than metric designator 53 63 (trade size 21⁄2) shall not be used.

Informational Note: See 300.1(C) for the metric designators and trade sizes. These are foridentification purposes only and do not relate to actual dimensions.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Bi-National Standard UL1653/ CSA C22.2 No. 227.1-06, Electrical Nonmetallic Tubing, has beenrevised to allow for metric designator 63. This larger size of ENT is currently permitted to be used inCanada per the Canadian Electrical Code. Bi-National Standard UL1653/ CSA C22.2 No. 227.1-06,Electrical Nonmetallic Tubing, has been revised to include both dimensional and performancerequirements.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



83 of 172 4/15/2015 4:32 PM

Roe, Rhett A.

West, Rodney J.


Allen, David F.

Bi-National Standard UL1653/ CSA C22.2 No. 227.1-06, Electrical Nonmetallic Tubing, has been revised to allowfor metric designator 63. This larger size of ENT is currently permitted to be used in Canada per the CanadianElectrical Code. Bi-National Standard UL1653/ CSA C22.2 No. 227.1-06, Electrical Nonmetallic Tubing, has beenrevised to include both dimensional and performance requirements.


84 of 172 4/15/2015 4:32 PM


362.30 Securing and Supporting.

ENT shall be installed as a complete system in accordance with 300.18 and shall be securely fastened inplace by an approved means and supported in accordance with 362.30(A) and (B).


ENT shall be securely fastened at intervals not exceeding 900 mm (3 ft). In addition, ENT shall besecurely fastened in place within 900 mm (3 ft) of each outlet box, device box, junction box, cabinet, orfitting where it terminates. Where used, cable ties shall be listed as suitable for the application and forsecuring and supporting.

Exception No. 1: Lengths not exceeding a distance of 1.8 m (6 ft) from a luminaire terminal connectionfor tap connections to lighting luminaires shall be permitted without being secured.

Exception No. 2: Lengths not exceeding 1.8 m (6 ft) from the last point where the raceway is securelyfastened for connections within an accessible ceiling to luminaire(s) or other equipment.

Exception No. 3: For concealed work in finished buildings or prefinished wall panels where suchsecuring is impracticable, unbroken lengths (without coupling) of ENT shall be permitted to be fished.

(B) Supports.

Horizontal runs of ENT supported by openings in framing members at intervals not exceeding 900 mm (3ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

UL 62275 establishes a system classification of cable ties intended for support of flexibleconduit.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.


85 of 172 4/15/2015 4:32 PM

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

UL 62275 establishes a system classification of cable ties intended for support of flexible conduit.


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366.1 Scope.

This article covers the use, installation, and construction requirements of metallic metal auxiliary guttersand nonmetallic auxiliary gutters and associated fittings.




Street Address:

City:

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Zip:


Committee Statement

CommitteeStatement:


Response Message:

Public Input No. 656-NFPA 70-2014 [Article 366]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



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Allen, David F.



88 of 172 4/15/2015 4:32 PM

First Revision No. 2172-NFPA 70-2015 [ Definition: Metallic Auxiliary Gutter. ]

Metallic Metal Auxiliary Gutter.

A sheet metal enclosure used to supplement wiring spaces at meter centers, distribution centers,switchgear, switchboards, and similar points of wiring systems. The enclosure has hinged or removablecovers for housing and protecting electrical wires, cable, and busbars. The enclosure is designed forconductors to be laid or set in place after the enclosures have been installed as a complete system.

Nonmetallic Auxiliary Gutter.

A flame-retardant, nonmetallic enclosure used to supplement wiring spaces at meter centers, distributioncenters, switchgear, switchboards, and similar points of wiring systems. The enclosure has hinged orremovable covers for housing and protecting electrical wires, cable, and busbars. The enclosure isdesigned for conductors to be laid or set in place after the enclosures have been installed as a completesystem.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.


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Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.



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(A) Outdoors.

Nonmetallic auxiliary gutters installed outdoors shall comply with be listed and labeled for all of thefollowing conditions :

(1) Be listed as suitable for exposure Exposure to sunlight

(2) Be listed as suitable for use Use in wet locations

(3) Be listed for maximum Maximum ambient temperature of the installation

(B) Indoors.

Nonmetallic auxiliary gutters installed indoors shall be listed and labeled for the maximum ambienttemperature of the installation.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

"Listed as suitable" is the same as "listed", "as suitable" adds no strengthening or lessening ofthe requirement. “Listed” is much more prevalent in the Code than “listed as suitable”.


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


91 of 172 4/15/2015 4:32 PM


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.

"Listed as suitable" is the same as "listed", "as suitable" adds no strengthening or lessening of the requirement.“Listed” is much more prevalent in the Code than “listed as suitable”.





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(A) Sheet Metallic Metal Auxiliary Gutters.

(1) Indoor and Outdoor Use.

Sheet metallic metal auxiliary gutters shall be permitted for indoor and outdoor use.

(2) Wet Locations.

Sheet metallic metal auxiliary gutters installed in wet locations shall be suitable for such locations.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


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Allen, David F.



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366.20 Conductors Connected in Parallel.

Where single conductor cables comprising each phase, neutral, or grounded conductor of analternating-current circuit are connected in parallel as permitted in 310.10(H) , the conductors shall beinstalled in groups consisting of not more than one conductor per phase, neutral, or grounded conductorto prevent current imbalance in the paralleled conductors due to inductive reactance.




Street Address:

City:

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Zip:


Committee Statement

CommitteeStatement:

There have been documented failures of parallel phase conductors due to inductive heating, whereinstalled in wireways or auxiliary gutters. In addition to the requirement of each parallel phaseconductor being the same length, the proper grouping of phases can reduce inductive heating andresult in a more balanced load between each conductor of a parallel phase.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



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Roe, Rhett A.

West, Rodney J.


Allen, David F.

the proper grouping of phases can reduce inductive heating and result in a more balanced load between eachconductor of a parallel phase.


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366.22 Number of Conductors.


The sum of the cross-sectional areas of all contained conductors and cables at any cross section of asheet metallic metal auxiliary gutter shall not exceed 20 percent of the interior cross-sectional area of thesheet metallic metal auxiliary gutter. The adjustment factors in 310.15(B)(3)(a) shall be applied onlywhere the number of current-carrying conductors, including neutral conductors classified as current-carrying under the provisions of 310.15(B)(5), exceeds 30. Conductors for signaling circuits or controllerconductors between a motor and its starter and used only for starting duty shall not be considered ascurrent-carrying conductors.

(B) Nonmetallic Auxiliary Gutters.

The sum of cross-sectional areas of all contained conductors and cables at any cross section of thenonmetallic auxiliary gutter shall not exceed 20 percent of the interior cross-sectional area of thenonmetallic auxiliary gutter.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Cables are acceptable for use in auxiliary gutters where the wire fill does not exceed 20percent.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


97 of 172 4/15/2015 4:32 PM


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.



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Where the number of current-carrying conductors contained in the sheet metallic metal auxiliary gutter is30 or less, the adjustment factors specified in 310.15(B)(3)(a) shall not apply. The current carriedcontinuously in bare copper bars in sheet metallic metal auxiliary gutters shall not exceed 1.55

amperes/mm2 (1000 amperes/in.2) of cross section of the conductor. For aluminum bars, the current

carried continuously shall not exceed 1.09 amperes/mm2 (700 amperes/in.2) of cross section of theconductor.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


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West, Rodney J.


Allen, David F.



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Sheet metallic metal auxiliary gutters shall be supported and secured throughout their entire length atintervals not exceeding 1.5 m (5 ft).




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.


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First Revision No. 2180-NFPA 70-2015 [ Section No. 366.56(A)(B) ]

(B) Bare Conductors.

Taps from bare conductors shall leave the gutter opposite their terminal connections, and conductors shallnot be brought in contact with uninsulated current-carrying parts of different potential voltages .




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: Voltage shall be used instead of potential per the NEC Style Manual 2011 Section 3.2.5.6.

Response Message:

Public Input No. 3277-NFPA 70-2014 [Section No. 366.56(A)(B)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.


103 of 172 4/15/2015 4:32 PM

Voltage shall be used instead of potential per the NEC Style Manual 2011 Section 3.2.5.6.


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366.60 Grounding.

Metallic Metal auxiliary gutters shall be connected to an equipment grounding conductor(s), to anequipment bonding jumper, or to the grounded conductor where permitted or required by 250.92(B)(1) or250.142.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



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Allen, David F.



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First Revision No. 2181-NFPA 70-2015 [ Section No. 366.100(A)(B)(E) ]

(E) Clearance of Bare Live Parts.

Bare conductors shall be securely and rigidly supported so that the minimum clearance between barecurrent-carrying metal parts of different potential voltages mounted on the same surface will not be lessthan 50 mm (2 in.), nor less than 25 mm (1 in.) for parts that are held free in the air. A clearance not lessthan 25 mm (1 in.) shall be secured between bare current-carrying metal parts and any metal surface.Adequate provisions shall be made for the expansion and contraction of busbars.




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: Voltage shall be used instead of potential per the NEC Style Manual 2011 Section 3.2.5.6.

Response Message:

Public Input No. 3278-NFPA 70-2014 [Section No. 366.100(A)(B)(E)]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


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Allen, David F.

Voltage shall be used instead of potential per the NEC Style Manual 2011 Section 3.2.5.6.


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First Revision No. 2146-NFPA 70-2015 [ Definition: Busway. ]

Busway.

A raceway consisting of a grounded metal enclosure containing factory-mounted, bare or insulatedconductors, which are usually copper or aluminum bars, rods, or tubes.

Informational Note: For cablebus, refer to Article 370.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Remove the word "grounded" from the definition of a Busway. Grounding is a requirement.Requirements are not to be used in definitions per the NEC Style Manual -2011 Section 2.2.2.Section 368.60 addresses the grounding requirements.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.


109 of 172 4/15/2015 4:32 PM

West, Rodney J.


Allen, David F.

Grounding is a requirement. Requirements are not to be used in definitions per the NEC Style Manual -2011Section 2.2.2. Section 368.60 addresses the grounding requirements.


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(C) Feeder or Branch Circuits.

Where a busway is used as a feeder, devices or plug-in connections for tapping off feeder or branchcircuits from the busway shall contain the overcurrent devices required for the protection of the feeder orbranch circuits. The plug-in device shall consist of an externally operable circuit breaker or an externallyoperable fusible switch. Where such devices are mounted out of reach and contain disconnecting means,suitable means such as ropes, chains, or sticks shall be provided for operating the disconnecting meansfrom the floor.

Exception No. 1: As permitted in 240.21.

Exception No. 2: For fixed or semifixed luminaires, where the branch-circuit overcurrent device is part ofthe luminaire cord plug on cord-connected luminaires.

Exception No. 3: Where luminaires without cords are plugged directly into the busway and theovercurrent device is mounted on the luminaire.

Exception No. 4: Where the branch-circuit overcurrent plug-in device is directly supplying a readilyaccessible disconnect, a method of floor operation shall not be required.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision adds an exception for installations where a branch-circuit overcurrent busway plug-indevice is directly supplying a readily accessible disconnect. This allows alternative methods ofproviding ready access to disconnects with an equivalent level of safety. Receptacles may be usedas a disconnecting means where permitted.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.


111 of 172 4/15/2015 4:32 PM

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

adds an exception for installations where a branch-circuit overcurrent busway plug-in device is directly supplyinga readily accessible disconnect. This allows alternative methods of providing ready access to disconnects with anequivalent level of safety. Receptacles may be used as a disconnecting means where permitted.


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368.214 Adjacent and Supporting Structures.

Metal-enclosed busways shall be installed so that temperature rise from induced circulating currents inany adjacent metallic ferrous metal parts will not be hazardous to personnel or constitute a fire hazard.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This first revision eliminates the word "metallic", adds clarity and better aligns the languageof this section with 300.20.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


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Allen, David F.

eliminates the word "metallic", adds clarity and better aligns the language of this section with 300.20.


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368.240 Wiring 600 1000 Volts or Less, Nominal.

Secondary control devices and wiring that are provided as part of the metal-enclosed bus run shall beinsulated by fire-retardant barriers from all primary circuit elements with the exception of short lengths ofwire, such as at instrument transformer terminals.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision increases the wiring voltage limit for alignment with other sections of the Code. Asstated in 110.4, the voltage rating of electrical equipment shall not be less than the nominalvoltage of a circuit to which it is connected.

ResponseMessage:




Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


115 of 172 4/15/2015 4:32 PM


Roe, Rhett A.

West, Rodney J.


Allen, David F.

increases the wiring voltage limit for alignment with other sections of the Code. As stated in 110.4, the voltagerating of electrical equipment shall not be less than the nominal voltage of a circuit to which it is connected.


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Cablebus shall not be permitted to be installed in the following :

(1) In hoistways Hoistways

(2) In hazardous Hazardous (classified) locations, unless specifically approved for the use permitted inChapter 5




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: This revision correlates with revisions in Chapter 5.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


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Allen, David F.

correlates with revisions in Chapter 5.


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370.23 Overcurrent Protection.

Cablebus shall be protected against overcurrent in accordance with the allowable ampacity of thecablebus conductors in accordance with 240.4.

Exception: Overcurrent protection shall be permitted in accordance with 240.100 and 240.101 for over1000 volts, nominal .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The voltage specification was removed from the exception to coordinate with 240.100 and240.101.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


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Allen, David F.

Statement: The voltage specification was removed from the exception to coordinate with 240.100 and 240.101.


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370.80 Ampacity of Conductors.

The ampacity of conductors in cablebus shall be in accordance with Table 310.15(B)(17) and Table310.15(B)(19) for installations up to and including 2000 volts, or with Table 310.60(C)(69) and Table310.60(C)(70) for installations 2001 to 35,000 volts.

Informational Note No. 1: See 110.14(C) for conductor temperature limitations due to terminationprovisions for installations up to and including 2000 volts.

Informational Note No. 2: See 110.40 for conductor temperature limitations due to terminationprovisions for installations 2001 to 35,000 volts.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision clarifies the section by informing the user of additional provisions which may beapplicable. It aligns this article with similar provisions in 310.15(A)(2) and 310.60(A)(1).

ResponseMessage:




Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.


121 of 172 4/15/2015 4:32 PM

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

clarifies the section by informing the user of additional provisions which may be applicable. It aligns this articlewith similar provisions in 310.15(A)(2) and 310.60(A)(1).


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Where single conductor cables comprising each phase, neutral, or grounded conductor of analternating-current circuit are connected in parallel as permitted in 310.10(H), the conductors shall beinstalled in groups consisting of not more than one conductor per phase, neutral, or grounded conductorto prevent current imbalance in the paralleled conductors due to inductive reactance.




Street Address:

City:

State:

Zip:

Submittal Date: Wed Jan 21 08:09:21 EST 2015

Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



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Roe, Rhett A.

West, Rodney J.


Allen, David F.



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376.22 Number of Conductors and Ampacity.

The number of conductors or cables and their ampacity shall comply with 376.22(A) and (B).

(A) Cross-Sectional Areas of Wireway.

The sum of the cross-sectional areas of all contained conductors and cables at any cross section of awireway shall not exceed 20 percent of the interior cross-sectional area of the wireway.

(B) Adjustment Factors.

The adjustment factors in 310.15(B)(3)(a) shall be applied only where the number of current-carryingconductors, including neutral conductors classified as current-carrying under the provisions of310.15(B)(5), exceeds 30 at any cross section of the wireway. Conductors for signaling circuits orcontroller conductors between a motor and its starter and used only for starting duty shall not beconsidered as current-carrying conductors.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Cables are acceptable for use in metal wireways where the wire fill does not exceed 20percent.

Response Message:

Public Input No. 2486-NFPA 70-2014 [Section No. 376.22 [Excluding any Sub-Sections]]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.


125 of 172 4/15/2015 4:32 PM

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Cables are acceptable for use in metal wireways where the wire fill does not exceed 20 percent.


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376.23 Insulated Conductors.

Insulated conductors installed in a metallic metal wireway shall comply with 376.23(A) and (B).

(A) Deflected Insulated Conductors.

Where insulated conductors are deflected within a metallic metal wireway, either at the ends or whereconduits, fittings, or other raceways or cables enter or leave the metallic metal wireway, or where thedirection of the metallic metal wireway is deflected greater than 30 degrees, dimensions corresponding toone wire per terminal in Table 312.6(A) shall apply.

(B) Metallic Metal Wireways Used as Pull Boxes.

Where insulated conductors 4 AWG or larger are pulled through a wireway, the distance between racewayand cable entries enclosing the same conductor shall not be less than that required by 314.28(A)(1) forstraight pulls and 314.28(A)(2) for angle pulls. When transposing cable size into raceway size, theminimum metric designator (trade size) raceway required for the number and size of conductors in thecable shall be used.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

"Metal" shall replace "Metallic" when describing solid hard material that is malleable, fusible,ductile and has good electrical and thermal conductivity.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.


127 of 172 4/15/2015 4:32 PM

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

"Metal" shall replace "Metallic" when describing solid hard material that is malleable, fusible, ductile and has goodelectrical and thermal conductivity.


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First Revision No. 2185-NFPA 70-2015 [ Section No. 376.56(B)(1) ]

(1) Installation.

Power distribution blocks installed in metal wireways shall be listed and labeled . Power distribution blocksinstalled on the line side of the service equipment shall be listed for the purpose.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:

Public Input No. 900-NFPA 70-2014 [Section No. 376.56(B)(1)]

Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.



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Allen, David F.






130 of 172 4/15/2015 4:32 PM



Nonmetallic wireways and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


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132 of 172 4/15/2015 4:32 PM



Where single conductor cables comprising each phase, neutral, or grounded conductor of analternating-current circuit are connected in parallel as permitted in 310.10(H) , the conductors shall beinstalled in groups consisting of not more than one conductor per phase, neutral, or grounded conductorto prevent current imbalance in the paralleled conductors due to inductive reactance.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



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Roe, Rhett A.

West, Rodney J.


Allen, David F.



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The sum of cross-sectional areas of all contained conductors or cables at any cross section of thenonmetallic wireway shall not exceed 20 percent of the interior cross-sectional area of the nonmetallicwireway. Conductors for signaling circuits or controller conductors between a motor and its starter andused only for starting duty shall not be considered as current-carrying conductors.

The adjustment factors specified in 310.15(B)(3)(a) shall be applicable to the current-carrying conductorsup to and including the 20 percent fill specified above in the first paragraph of this section .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Cables are acceptable for use in nonmetallic wireways where the wire fill does not exceed20 percent.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.



135 of 172 4/15/2015 4:32 PM

Roe, Rhett A.

West, Rodney J.


Allen, David F.

Cables are acceptable for use in nonmetallic wireways where the wire fill does not exceed 20 percent.


136 of 172 4/15/2015 4:32 PM

First Revision No. 2156-NFPA 70-2015 [ Definition: Strut-Type Channel Raceway. ]

Strut-Type Channel Raceway.

A metallic metal raceway that is intended to be mounted to the surface of or suspended from a structure,with associated accessories for the installation of electrical conductors and cables.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Metallic was revised to metal, Metal should be used instead of Metallic when describingmaterials per the NEC Style Manual.

ResponseMessage:

Public Input No. 659-NFPA 70-2014 [Definition: Strut-Type Channel Raceway.]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


137 of 172 4/15/2015 4:32 PM


Allen, David F.

Metallic was revised to metal, Metal should be used instead of Metallic when describing materials per the NECStyle Manual.


138 of 172 4/15/2015 4:32 PM



Strut-type channel raceways, closure strips, and accessories shall be listed, labeled, and identified forsuch use.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.



139 of 172 4/15/2015 4:32 PM

Allen, David F.






140 of 172 4/15/2015 4:32 PM



The use of strut-type channel raceways shall be permitted in the following:

(1) Where exposed.

(2) In dry locations.

(3) In locations subject to corrosive vapors where protected by finishes judged suitable approved for thecondition.

(3) Where the voltage is 600 volts or less.

(4) As power poles.

(5) In Class I, Division 2 hazardous (classified) locations as permitted in 501.10(B)(3) Chapter 5 .

(6) As extensions of unbroken lengths through walls, partitions, and floors where closure strips areremovable from either side and the portion within the wall, partition, or floor remains covered.

(7) Ferrous channel raceways and fittings protected from corrosion solely by enamel shall be permittedonly indoors.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

References to voltage were deleted. Based on UL5B, Strut-Type Channel Raceways and Fittings,the current construction of strut would not be required to be modified to accommodate voltagechanges to maintain its current Listing.

"Judged" is a vague term and is not in accordance to Section 3.2, Word Choices, of the 2011 NECStyle Manual. "Approved" is recognized as a standard term per Annex B of the 2011 NEC StyleManual.

Reference to specific sections in Chapter 5 have been replaced with a general reference toChapter 5.

ResponseMessage:





Ballot Results



141 of 172 4/15/2015 4:32 PM

13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

References to voltage were deleted. Based on UL5B, Strut-Type Channel Raceways and Fittings, the currentconstruction of strut would not be required to be modified to accommodate voltage changes to maintain its currentListing. "Judged" is a vague term and is not in accordance to Section 3.2, Word Choices, of the 2011 NEC StyleManual. "Approved" is recognized as a standard term per Annex B of the 2011 NEC Style Manual. Reference tospecific sections in Chapter 5 have been replaced with a general reference to Chapter 5.


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The number of conductors or cables permitted in strut-type channel raceways shall not exceed thepercentage fill using Table 384.22 and applicable cross-sectional area of specific types and sizes of wiregiven in the tables in Chapter 9.

The adjustment factors of 310.15(B)(3)(a) shall not apply to conductors installed in strut-type channelraceways where all of the following conditions are met:

(1) The cross-sectional area of the raceway exceeds 2500 mm2 (4 in.2).

(2) The current-carrying conductors do not exceed 30 in number.

(3) The sum of the cross-sectional areas of all contained conductors does not exceed 20 percent of theinterior cross-sectional area of the strut-type channel raceways.

Table 384.22 Channel Size and Inside Cross-Sectional Area

Size ChannelArea 40% Area* 25% Area†

in.2 mm2 in.2 mm2 in.2 mm2

15⁄8 × 13 /16 0.887 572 0.355 229 0.222 143

15⁄8 × 1 1.151 743 0.460 297 0.288 186

15⁄8 × 13⁄8 1.677 1076 0.671 433 0.419 270

15⁄8 × 15⁄8 2.028 1308 0.811 523 0.507 327

15⁄8 × 27⁄16 3.169 2045 1.267 817 0.792 511

15⁄8 × 31⁄4 4.308 2780 1.723 1112 1.077 695

11⁄2 × 3⁄4 0.849 548 0.340 219 0.212 137

11⁄2 × 11⁄2 1.828 1179 0.731 472 0.457 295

11⁄2 × 17⁄8 2.301 1485 0.920 594 0.575 371

11⁄2 × 3 3.854 2487 1.542 995 0.964 622

*Raceways with external joiners shall use a 40 percent wire fill calculation to determine the number ofconductors permitted.

†Raceways with internal joiners shall use a 25 percent wire fill calculation to determine the number ofconductors permitted.




Street Address:

City:

State:

Zip:


Committee Statement


143 of 172 4/15/2015 4:32 PM

CommitteeStatement:

Cables are acceptable for use in strut-type channel raceways where the wire fill does notexceed Table 384.22.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Cables are acceptable for use in strut-type channel raceways where the wire fill does not exceed Table 384.22.


144 of 172 4/15/2015 4:32 PM


(C) Cover.

Covers of strut-type channel raceways shall be either metallic metal or nonmetallic.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.


145 of 172 4/15/2015 4:32 PM



146 of 172 4/15/2015 4:32 PM

First Revision No. 2155-NFPA 70-2015 [ Definition: Surface Metal Raceway. ]

Surface Metal Raceway.

A metallic metal raceway that is intended to be mounted to the surface of a structure, with associatedcouplings, connectors, boxes, and fittings for the installation of electrical conductors.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Metallic was revised to metal, Metal should be used instead of Metallic when describingmaterials per the NEC Style Manual.

ResponseMessage:

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.



147 of 172 4/15/2015 4:32 PM

Allen, David F.

Metallic was revised to metal, Metal should be used instead of Metallic when describing materials per the NECStyle Manual.


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Surface metal raceway and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


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150 of 172 4/15/2015 4:32 PM


386.70 Combination Raceways.

When combination surface metallic metal raceways are used for both signaling and for lighting and powercircuits, the different systems shall be run in separate compartments identified by stamping, imprinting, orcolor coding of the interior finish.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


151 of 172 4/15/2015 4:32 PM


Allen, David F.



152 of 172 4/15/2015 4:32 PM



Surface nonmetallic raceway and associated fittings shall be listed and labeled .




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:


ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

11 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.

Roe, Rhett A.

West, Rodney J.


Allen, David F.


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(B) Not Permitted.

Underfloor raceways shall not be installed (1) where subject to corrosive vapors or (2) in any hazardous(classified) locations, except as permitted by 504.20 and in Class I, Division 2 locations as permitted in501.10(B)(3). Unless made of a material judged suitable approved for the condition or unless corrosionprotection approved for the condition is provided, ferrous or nonferrous metal underfloor raceways,junction boxes, and fittings shall not be installed in concrete or in areas subject to severe corrosiveinfluences.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

"Judged" is a vague term and is not in accordance to Section 3.2, Word Choices, of the 2011NEC Style Manual. "Approved" is recognized as a standard term per Annex B of the 2011 NECStyle Manual.

The text "ferrous and nonferrous" was removed because it did not provide clarity.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.


155 of 172 4/15/2015 4:32 PM

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

"Judged" is a vague term and is not in accordance to Section 3.2, Word Choices, of the 2011 NEC Style Manual."Approved" is recognized as a standard term per Annex B of the 2011 NEC Style Manual.


156 of 172 4/15/2015 4:32 PM


392.1 Scope.

This article covers cable tray systems, including ladder, ventilated trough, ventilated channel, solid bottom,and other similar structures.

Informational Note: For further information on cable trays, see ANSI/NEMA–VE 1-2002 2009 ,Metal Cable Tray Systems; NECA/NEMA 105-2007 2015 , Standard for Installing Metal Cable TraySystems; and NEMA–FG 1-1998 1993 , Nonmetallic Cable Tray Systems.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

CMP-8 understands that the scope of the article is under the purview of the CC. CMP-8recommends that the CC support this First Revision. The 2013 year reflected in the substantiationfor NECA/NEMA 105 is incorrect and the revised year of 2015 is correct. In addition, the editionyears for ANSI/NEMA-VE 1 were updated from 2002 to 2009, and the NEMA FG 1 revision datewas corrected from 1998 to 1993.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.


157 of 172 4/15/2015 4:32 PM

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

The 2013 year reflected in the substantiation for NECA/NEMA 105 is incorrect and the revised year of 2015 iscorrect. In addition, the edition years for ANSI/NEMA-VE 1 were updated from 2002 to 2009, and the NEMA FG 1revision date was corrected from 1998 to 1993.


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First Revision No. 2123-NFPA 70-2015 [ Sections 392.20(A), 392.20(B) ]

(A) Multiconductor Cables Operating at 600 1000 Volts or Less.

Multiconductor cables operating at 600 1000 volts or less shall be permitted to be installed in the sametray.

(B) Cables Operating at Over 600 1000 Volts.

Cables operating at over 600 1000 volts and those operating at 600 volts or less installed in the samecable tray shall comply with either of the following:

(1) The cables operating at over 600 1000 volts are Type MC.

(2) The cables operating at over 600 1000 volts are separated from the cables operating at 600 1000volts or less by a solid fixed barrier of a material compatible with the cable tray.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision resolves issues with actions taken in the 2014 NEC cycle by revising the language of392.20 to correlate with the prior actions taken to change from 600 volts to 1000 volts in othersections of the Code. This change does not impact safety or allow use of a product above its ratingas Section 110.4 requires the voltage rating of cables to be not be less than the nominal voltage of acircuit to which it is connected.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.


159 of 172 4/15/2015 4:32 PM

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

resolves issues with actions taken in the 2014 NEC cycle by revising the language of 392.20 to correlate with theprior actions taken to change from 600 volts to 1000 volts in other sections of the Code. This change does notimpact safety or allow use of a product above its rating as Section 110.4 requires the voltage rating of cables to benot be less than the nominal voltage of a circuit to which it is connected.


160 of 172 4/15/2015 4:32 PM

First Revision No. 2124-NFPA 70-2015 [ Section No. 392.22(A) [Excluding any

Sub-Sections] ]

The number of multiconductor cables, rated 2000 volts or less, permitted in a single cable tray shall notexceed the requirements of this section. The conductor sizes shall apply to both aluminum and copperconductors. Where dividers are used, fill calculations shall apply to each divided section of the cable tray.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Fill calculations must be applied to the width of each specifically divided section of the cabletray to appropriately manage the heat dissipation of the cables.

ResponseMessage:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


161 of 172 4/15/2015 4:32 PM


Allen, David F.

Fill calculations must be applied to the width of each specifically divided section of the cable tray to appropriatelymanage the heat dissipation of the cables.


162 of 172 4/15/2015 4:32 PM


392.60 Grounding and Bonding.

(A) Metallic Metal Cable Trays.

Metallic Metal cable trays shall be permitted to be used as equipment grounding conductors wherecontinuous maintenance and supervision ensure that qualified persons service the installed cable traysystem and the cable tray complies with provisions of this section. Metallic Metal cable trays that supportelectrical conductors shall be grounded as required for conductor enclosures in accordance with 250.96and Part IV of Article 250. Metal cable trays containing only non-power conductors shall be electricallycontinuous through approved connections or the use of a bonding jumper.

Informational Note: Examples of non-power conductors include nonconductive optical fiber cablesand Class 2 and Class 3 Remote Control Signaling and Power Limiting Circuits.

Table 392.60(A) Metal Area Requirements for Cable Trays Used as Equipment Grounding Conductor

Maximum Fuse Ampere Rating, Circuit Breaker Ampere TripSetting, or Circuit Breaker Protective Relay Ampere Trip Setting for

Ground-Fault Protection of Any Cable Circuit in the Cable TraySystem

Minimum Cross-Sectional

Area of Metala

Steel CableTrays

AluminumCable Trays

mm2 in.2 mm2 in.2

60 129 0.20 129 0.20

100 258 0.40 129 0.20

200 451.5 0.70 129 0.20

400 645 1.00 258 0.40

600 967.5 1.50b 258 0.40

1000 — — 387 0.60

1200 — — 645 1.00

1600 — — 967.5 1.50

2000 — — 1290 2.00b

aTotal cross-sectional area of both side rails for ladder or trough cable trays; or the minimum cross-sectional area of metal in channel cable trays or cable trays of one-piece construction.

bSteel cable trays shall not be used as equipment grounding conductors for circuits with ground-faultprotection above 600 amperes. Aluminum cable trays shall not be used as equipment groundingconductors for circuits with ground-fault protection above 2000 amperes.

(B) Steel or Aluminum Cable Tray Systems.

Steel or aluminum cable tray systems shall be permitted to be used as equipment grounding conductors,provided all the following requirements are met:

(1) The cable tray sections and fittings are identified as an equipment grounding conductor.

(2) The minimum cross-sectional area of cable trays conform to the requirements in Table 392.60(A).

(3) All cable tray sections and fittings are legibly and durably marked to show the cross-sectional area ofmetal in channel cable trays, or cable trays of one-piece construction, and the total cross-sectionalarea of both side rails for ladder or trough cable trays.

(4) Cable tray sections, fittings, and connected raceways are bonded in accordance with 250.96, usingbolted mechanical connectors or bonding jumpers sized and installed in accordance with 250.102.


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(C) Transitions.

Where metallic metal cable tray systems are mechanically discontinuous, as permitted in 392.18(A), abonding jumper sized in accordance with 250.102 shall connect the two sections of the cable tray, or thecable tray and the raceway or equipment. Bonding shall be in accordance with 250.96.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Metal should be used instead of Metallic when describing materials per the NEC StyleManual.

Response Message:


Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Metal should be used instead of Metallic when describing materials per the NEC Style Manual.


164 of 172 4/15/2015 4:32 PM

First Revision No. 2149-NFPA 70-2015 [ Part IV. ]

Part IV. Requirements for Over 600 1000 Volts, Nominal




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

This revision revises the voltage limit from 600 to 1000 to better align with other raceways and wiringmethods throughout the code. CMP-8 recognizes that changes to the installation code maynecessitate updates to product standards and may involve additional product testing in order toincrease the voltage rating of products. Section 110.4 requires the voltage rating of electricalequipment to be not be less than the nominal voltage of a circuit to which it is connected. This changedoes not allow the use of equipment in circuits operating above their voltage rating, which is stated onthe product nameplate. Presently Part IV of Article 368 applies to metal enclosed busways that arerated at over 600 volts, including busways rated at 5(4.76), 15, 27, and 38kV. Raising the level from600 to 1000 volts does not impact the installation requirements for busways presently rated at5(4.76), 15, 27, or 38kV. This revision is consistent with the recommendations of the CorrelatingCommittee Task Group.

ResponseMessage:

Public Input No. 1529-NFPA 70-2014 [Part IV.]



Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete


165 of 172 4/15/2015 4:32 PM

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

revises the voltage limit from 600 to 1000 to better align with other raceways and wiring methods throughout thecode.


166 of 172 4/15/2015 4:32 PM

First Revision No. 2126-NFPA 70-2015 [ Section No. Table ]


167 of 172 4/15/2015 4:32 PM

Table 1

Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables

Number of Conductors and/or Cables Cross-Sectional Area (%)

1 53

2 31

Over 2 40

Informational Note No. 1: Table 1 is based on common conditions of proper cabling and alignmentof conductors where the length of the pull and the number of bends are within reasonable limits. Itshould be recognized that, for certain conditions, a larger size conduit or a lesser conduit fill shouldbe considered.

Informational Note No. 2: When pulling three conductors or cables into a raceway, if the ratio of theraceway (inside diameter) to the conductor or cable (outside diameter) is between 2.8 and 3.2,jamming can occur. While jamming can occur when pulling four or more conductors or cables into araceway, the probability is very low.

Notes to Tables

(1) See Informative Annex C for the maximum number of conductors and fixture wires, all of the samesize (total cross-sectional area including insulation) permitted in trade sizes of the applicable conduitor tubing.

(2) Table 1 applies only to complete conduit or tubing systems and is not intended to apply to sections ofconduit or tubing used to protect exposed wiring from physical damage.

(3) Equipment grounding or bonding conductors, where installed, shall be included when calculatingconduit or tubing fill. The actual dimensions of the equipment grounding or bonding conductor(insulated or bare) shall be used in the calculation.

(4) Where conduit or tubing nipples having a maximum length not to exceed 600 mm (24 in.) areinstalled between boxes, cabinets, and similar enclosures, the nipples shall be permitted to be filledto 60 percent of their total cross-sectional area, and 310.15(B)(3)(a) adjustment factors need notapply to this condition.

(5) For conductors not included in Chapter 9, such as multiconductor cables and optical fiber cables, theactual dimensions shall be used.

(6) For combinations of conductors of different sizes, use actual dimensions or Table 5 and Table 5A fordimensions of conductors and Table 4 for the applicable conduit or tubing dimensions.

(7) When calculating the maximum number of conductors or cables permitted in a conduit or tubing, allof the same size (total cross-sectional area including insulation), the next higher whole number shallbe used to determine the maximum number of conductors permitted when the calculation results in adecimal greater than or equal to 0.8. When calculating the size for conduit or tubing permitted for asingle conductor, one conductor shall be permitted when the calculation results in a decimal greaterthan or equal to 0.8.

(8) Where bare conductors are permitted by other sections of this Code, the dimensions for bareconductors in Table 8 shall be permitted.

(9) A multiconductor cable, optical fiber cable, or flexible cord of two or more conductors shall be treatedas a single conductor for calculating percentage conduit or tubing fill area. For cables that haveelliptical cross sections, the cross-sectional area calculation shall be based on using the majordiameter of the ellipse as a circle diameter. Assemblies of single insulated conductors without anoverall covering shall not be considered a cable when determining conduit or tubing fill area. Theconduit or tubing fill for the assemblies shall be calculated based upon the individual conductors.

(10) The values for approximate conductor diameter and area shown in Table 5 are based on worst-casescenario and indicate round concentric-lay-stranded conductors. Solid and round concentric-lay-stranded conductor values are grouped together for the purpose of Table 5. Round compact-stranded conductor values are shown in Table 5A. If the actual values of the conductor diameter andarea are known, they shall be permitted to be used.



168 of 172 4/15/2015 4:32 PM



Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Assembled conductors shall not be considered a cable and are required to be treated asindividual conductors. The expanded Note 9 to Table 1 clarifies the requirements for wire fillcalculation.

ResponseMessage:

Public Input No. 3511-NFPA 70-2014 [Section No. Table]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

Assembled conductors shall not be considered a cable and are required to be treated as individual conductors.The expanded Note 9 to Table 1 clarifies the requirements for wire fill calculation.


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First Revision No. 2127-NFPA 70-2015 [ Sections Table 4 Article 356 LFNC-B, Table 4

Article 356 LF... ]

Table 4 Article 356 LFNC-A

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-A*)

Metric

Designator

Trade

Size

Over 2Wires

40%

60%1 Wire

53%

2 Wires

31%

Nominal

Internal

Diameter

Total Area

100%

mm2 in.2 mm2 in.2 mm2 in.2 mm2 in.2 mm in. mm2 in.2

12 3⁄8 50 0.077 75 0.115 66 0.102 39 0.060 12.6 0.495 125 0.192

16 1⁄2 80 0.125 121 0.187 107 0.165 62 0.097 16.0 0.630 201 0.312

21 3⁄4 139 0.214 208 0.321 184 0.283 107 0.166 21.0 0.825 346 0.535

27 1 221 0.342 331 0.513 292 0.453 171 0.265 26.5 1.043 552 0.854

35 11⁄4 387 0.601 581 0.901 513 0.796 300 0.466 35.1 1.383 968 1.502

41 11⁄2 520 0.807 781 1.211 690 1.070 403 0.626 40.7 1.603 1301 2.018

53 2 863 1.337 1294 2.006 1143 1.772 669 1.036 52.4 2.063 2157 3.343

*Corresponds to 356.2(1).

Table 4 Article 356 LFNC-B

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-B*)

Metric

Designator

Trade

Size

Over 2Wires

40%

60%1 Wire

53%

2 Wires

31%

Nominal

Internal

Diameter

Total Area

100%

mm2 in.2 mm2 in.2 mm2 in.2 mm2 in.2 mm in. mm2 in.2

12 3⁄8 49 0.077 74 0.115 65 0.102 38 0.059 12.5 0.494 123 0.192

16 1⁄2 81 0.125 122 0.188 108 0.166 63 0.097 16.1 0.632 204 0.314

21 3⁄4 140 0.216 210 0.325 185 0.287 108 0.168 21.1 0.830 350 0.541

27 1 226 0.349 338 0.524 299 0.462 175 0.270 26.8 1.054 564 0.873

35 11⁄4 394 0.611 591 0.917 522 0.810 305 0.474 35.4 1.395 984 1.528

41 11⁄2 510 0.792 765 1.188 676 1.050 395 0.614 40.3 1.588 1276 1.981

53 2 836 1.298 1255 1.948 1108 1.720 648 1.006 51.6 2.033 2091 3.246



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Table 4 Article 356 LNFC-C *

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-C*)

MetricDesignator

TradeSize

Over 2Wires 40% 60% 1 Wire 53%

2 Wires31%

NominalInternal

DiameterTotal Area

100%

mm 2 in. 2 mm 2 in. 2 mm 2 in. 2 mm 2 in. 2 mm in. mm 2 in. 2

12 3 ⁄8 47.7 0.074 71.5 0.111 63.2 0.098 36.9 0.057 12.3 0.485 119.19 0.185

16 1 ⁄2 77.9 0.121 116.9 0.181 103.2 0.160 60.4 0.094 15.7 0.620 194.778 0.302

21 3 ⁄4 134.6 0.209 201.9 0.313 178.4 0.276 104.3 0.162 20.7 0.815 336.568 0.522

27 1 215.0 0.333 322.5 0.500 284.9 0.442 166.6 0.258 26.2 1.030 537.566 0.833

35 1 1 ⁄4 380.4 0.590 570.6 0.884 504.1 0.781 294.8 0.457 34.8 1.370 951.039 1.474

41 1 1 ⁄2 509.2 0.789 763.8 1.184 674.7 1.046 394.6 0.612 40.3 1.585 1272.963 1.973

53 2 847.6 1.314 1271.4 1.971 1123.1 1.741 656.9 1.018 51.9 2.045 2119.063 3.285





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Committee Statement

CommitteeStatement:

The tables for LFNC-B and LFNC-A are being reordered, alphabetically.

A new chart for Liquidtight Flexible Nonmetallic Conduit (LFNC-C) was developed for Table 4 inChapter 9. This chart completes the information available for Liquidtight Flexible NonmetallicConduit, Article 356, in Table 4. Type LFNC-C, which corresponds to 356.2(3) has been absent inthis Chapter. By completing this chart for LFNC-C, wire fill Tables are also being proposed forInformational Annex C. The Nominal Internal Diameter equals the minimum diameter per Table 5 ofUL1660, Liquid-Tight Flexible Nonmetallic Conduit, plus 0.254 mm (0.010 in.).

ResponseMessage:

Public Input No. 1068-NFPA 70-2014 [New Section after Table]

Ballot Results


13 Eligible Voters

0 Not Returned

12 Affirmative All



0 Abstention


171 of 172 4/15/2015 4:32 PM

Affirmative All

Campbell, David M.

Cogburn, Larry D.


Hengst, Kenneth W.

Jackson, Pete

Johnson, Gary K.

Kendall, David H.

Loyd, Richard E.

Myers, Paul W.


Roe, Rhett A.

West, Rodney J.


Allen, David F.

The tables for LFNC-B and LFNC-A are being reordered, alphabetically.


172 of 172 4/15/2015 4:32 PM

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