IEC 60364-4-41 64 1342 RVC

64/1342/RVCRESULT OF VOTING ON CDV

Project number:IEC 60364-4-41, Ed.5

Reference number of the CDV64/1272/CDV

IEC/TC or SCTC 64

Date of circulation2003-10-03

Title of the TC or SC concernedElectrical installations and protection against electric shock

Title of the committee draft:IEC 60364-4-41, Ed. 5: Electrical installations of buildings – Part 4-41: Protection for safety– Protection against electric shock

The above-mentioned document was distributed to National Committees with a request that voting take place for approvalfor circulation as an FDIS (or publication as a Technical Specification or Report)

Voting results

see printout attached

Comments received – see annex 1)

In the case that the approval criteria for acceptance have been met,a The committee draft for vote (CDV) will be registered as an FDIS by (date) ..........b The draft technical report (DTR) will be published as a Technical Report

The draft technical specification (DTS) will be published as a Technical Specificationby (date) ..........

DECISION OF THE CHAIRMAN (in cooperation with the secretariat), in the case that the approval criteria for acceptancehave not been metc A revised committee draft for vote (CDV) will be distributed by (date) 2004-02d A revised committee draft (CD) will be distributed by (date) ..........NOTE In the case of a proposal c or d made by the chairman, P-members objecting to such a proposal shall inform theCentral Office with copy to the secretary in writing within 2 months of the circulation of this compilation (see ISO/IECDirectives, Part 1, 2.6.5).

The comments will be discussed at the next meeting of the on (date) ..........

Name or signature of the Secretary

Reinhard PELTA

Name or signature of the Chairman

Roland TALON

FORM RVC (IEC)2002-03-20

1) to be collated on Form Comments and annexed.

– 2 – 64/1342/RVC

ANNEX A

Result of Voting on CDV - Document 64/1272/CDV

Project: IEC 60364-4-41 Ed.5IEC 60364-4-41, Ed.5: Electrical installations and protection against electric shock

Circulation Date: 2002-10-18 Closing Date: 2003-03-21

Country Status Received Vote CommentsAustralia P 2003-02-12 Y -Austria P 2003-03-21 N YBelgium P 2003-03-21 N YCanada P 2003-02-26 Y -China P 2003-03-11 Y YCroatia O 2003-03-21 Y YCzech Republic P 2003-03-18 Y -Denmark P 2003-03-21 Y YFinland P 2003-03-17 N YFrance P 2003-01-21 N YGermany P 2003-03-20 N YGreece O 2003-03-19 N YHungary P 2003-03-20 A -Ireland P 2003-03-20 Y YItaly P 2003-03-20 N YJapan P 2003-03-13 Y -Korea (Rep. of) P 2003-03-21 Y -Mexico P 2003-03-20 A -Netherlands P 2003-03-21 Y YNew Zealand P 2003-02-27 N YNorway P 2003-03-21 N YPoland P 2003-03-18 N YPortugal O 2003-03-21 A -Russian Fed. P 2003-03-21 Y -Slovakia P 2003-02-14 Y -South Africa P 2003-03-19 N YSpain P 2003-03-21 N YSweden P 2003-02-07 Y YSwitzerland P 2003-03-21 Y YU.S.A. P 2003-03-18 Y -United Kingdom P 2003-02-12 Y Y

Approval Criteria ResultP-members voting: 26P-members in favour: 15 = 58 % >= 67% REJECTEDTotal votes cast: 28 Total against: 12 = 43 % <= 25% REJECTED

Final Decision: REJECTED

NOTES

1. Vote: Does the National Committee agree to the circulation of the draft as a FDIS:Y = In favour; N = Against; A = Abstention.2. Only votes received before the closing date are counted in determining the decision.Late Votes: (0).3. Abstentions are not taken into account when totalizing the votes.4. P-members not voting: Indonesia; (1).

– 3 – 64/1342/RVCAnnex B

Date Document2003-10-03 64/1272/CDV

Number NationalCommittee

Clause/Subclause

ParagraphFigure/Table

Type of comment(General/

Technical/Editorial)

COMMENTS Proposed change OBSERVATIONS OF THESECRETARIAT

on each comment submitted1 BE G The Belgian National Committee casts a

negative vote with the following comments.Noted

2 CH G The Swiss National Commitee casts a positivevote to 64/1272/CDV

Noted

3 CN G IEC61140 has been formal issuance and therecension of IEC60364-4-41 should beconcurrent.For example, item 5.2.2, in IEC61140,“Protective-equipotential-bonding-system” isfault protection, and in 64/1272/CDV “Protective-equipotential-bonding-system” is not faultprotection. This two are not consistent.

Not accepted.64/1272/CDV isconsidered to beconsistent with IEC61140.In 411.3 Protectiveequipotential bonding ispart of the fault protectiveprovision and also in C2earth-free localequipotential bonding is afault protective provision.

4 DE G The German National Committeedoes not agree to the CDV wording to betransferred into an FDIS for the reasons given inthe comments hereafter.

Our main reason to reject the CDV is themissing requirement with regard to sub-clause413.1.3.7 in the valid IEC 60364-4-41 : 2001-08dealing with the voltage balance in TN –Systemsin case of a fault between a line conductor andearth at the supply system.At the recent Clearwater/USA meeting of TC 64-WG9 this item was discussed in depth based ona proposal offered from Germany and theConvenor of WG 9. Finally in WG9 a proposalwas develo-ped to introduce in subclause413.1.3 of the valid IEC 60364-4-41, 4th edition,and consequently in the comparable subclause411.4 of the CDV draft the followingspecification:

Add to clause 411.4 the followingsubclause:In TN systems the integrity of theearthing of the installation depends

Agreed to add first twosentences of the proposalas mandatory text and thetwo examples as notes.Add a note: In Germanycompliance with conditionRB/RE ≤ 50/(Uo-50) iscompulsory for the supplynetwork operator.

– 4 – 64/1342/RVCNumber National

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on each comment submitted

The German National Committee is in a positionto withdraw the rejection and to accept the CDVdraft if the entire wording from the ClearwaterWG9 meeting shown on the right is added toclause 411.4 in the future FDIS.

on the reliable and effectiveconnection of the PEN or PEconductors to earth. Where theearthing is provided from a publicor other supply system compliancewith the necessary conditions isthe responsibility of the supplynetwork operator.

Examples of conditions are:

- the PEN is connected to earth ata num-ber of points and installed insuch a way as to minimize the riskof a break in the PEN conductor,

RB/RE ≤ 50V/(Uo-50V)

5 DE G We submit the same comments like in IEC alsoon the parallel CENELEC –Enquiry to CLC-CS.In the case the CDV is approved for FDIS in IECwe request the considerati-on of all ourcomments which are not agreed in IEC-TC64 forthe FDIS in the responsible CWG-A of CLC-SC64A as proposals for common modifications.

For CENELEC- SC64A to considerthe residual proposals not agreedin IEC for common modifications.

Noted

6 DE G In the entire draft check in accordance with theIEC Directives as to whether in the legends to allformulas the quoting of dimensions like ohms,amperes, amps, volts etc. should be deleted.

Editorial, formulae shallcomply with 6.6.9 of Part 2of the IEC/ISO Directives.Agreed to consult with MrPelta.

7 ES G The Spanish National Committee casts anegative vote and submits the followingcomments on the mentioned document.

Noted

8 FI G The Finnish national committee votes againstthis CDV, because we can't accept requirementsof subcaluse 411.3.3.1

Noted

9 FR G The French national committee proposes anegative vote with the following comments.

Noted

10 GR G Due to the fact that a proper sRCD in socketoutlets does not protect substream residualcurrent we permit the use of it only under the

Noted, but the SRCD inclause 411.3.3.1 relates toadditional protection of


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on each comment submittedcondition that a RCD is installed in theswitchboard

persons using anappliance connected to theSRCD.

11 HR G The Croatian National Committee casts apositive vote with one comment.

Noted

12 IT G Italian National Committee is not in favour onthis document and sumbitted the followingcomments.

Noted

13 NO G The negative vote from the Norwegian nationalcommittee will turn to a positive vote if our

comment to 411.3.3 is accepted.

Noted

14 ZA G ZA casts a NEGATIVE VOTE on document61/1272/CDV

ZA is prepared to change theirnegative vote into a positive vote ifthe above comment and proposalis favourably considered.

Noted

15 DE Introduct-ory noteon page

1

2nd

sentenceE The second sentence should be transfer-red to

the introduction on page 3 after the 3rd

paragraph reading as follows:

This standard has the status of aGroup Safety Publication ( GSP)for protection against electricshock.

Accepted

16 DE Introduc-tion

Page 3wording

of the last5 lines

E We see no reason to print this wording in boldletters

Use normal letters for print Accepted

17AT 410 E Corresponding to the "Contents" there is missing

a headline like:410 Introduction

Accepted, editorial

18 HR 410.2 T Quote a new edition of IEC 61140:2001 instead1997

Accepted, editorial

19 DE 410.2 IEC61557-9

E For correctness the reference should read asfollows:

IEC 61557-9 : Equipment fortesting, measuring or monitoring ofprotective measures – Equipmentfor insulation fault location in ITsystems

Accepted, editorial


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on each comment submitted20 IT 410.2 E The indication of IEC 60947-2 is missing Introduce the following normative

document:IEC 60947-2

See 21

21 NL 410.2 E add under normative references the followingrelevant documents

add IEC60364 Part 5-531” devicesfor protection against indirectcontact by automatic disconnectionof supplyIEC 60947-2 App. B Circuitbreakers with earth leakageproptection”

Accepted in principle,delete reference toAppendix B.

22 IT 410.3 T We propose to use, throughout the document,as in the existing Publication 60364-4-41, thewords “protection against direct contact” and“protection against indirect contact”, inaccordance with the Notes to subclauses 3.1.1and 3.1.2 of Clause 3 of IEC 61140.

Replace, throughout all thedocument, the words “basicprotection” by “protection againstdirect contact (basic protection)”and the words “fault protection” by“protection against indirect contact(fault protection)”.

Agreed basicprotection(protectionagainst direct contact) andfault protection(protectionagainst indirect contact),also n heading.

23 FR 410.3.2 Technical Advice should be given to the installers thatsome protective measure are basically usedonly for some parts of the installations and arenot easily usable for the whole installation.

To add the following note at theend of the subclause :NOTE - In practice, most ofelectrical installations apply themain protective measure byautomatic disconnection of supply,some parts of these installationsmay use one of the otherprotective measures.

Add note:In electrical installationsthe most commonly usedprotective measure isautomatic disconnection ofsupply.

24 DE 410.3.2 2nd para E Amend the wording so as to read as follows:

Reason: The wording“ Except as specified in 410.3.5 and 410.3.6.... “is confusing and should be deleted withoutreplacement.

The following protective measuresare permitted:- automatic .......

See 25

25 DK 410.3.2 Secondparagrap

h

E Wrong references Change the references “410.3.5and 410.3.6” to “410.3.4 and410.3.5”

Accepted

26 DE 410.3.2 4th indent E Amend the wording so as to read as follows:Reason: alignment with the title of 414 - extra-low-voltage ( SELV and

PELV)

Accepted

27 NL 410.3.2 E last sentence: … are specified in411 up to and included 414 doesnot …

Add “inclusive ater 414”


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on each comment submitted28 DE 410.3.3 E Replace “ ...section of IEC 60364-7 “ with:

Reasons:Sections do no longer exist in IEC60364.IEC 60364-7 is a series consisting of severalstandards.

....part of the IEC 60364-7 seriesshall be applied.

Accepted

29 NO 410.3.4 T/E The meaning of this requirement is unclear. Reword the paragraph:

“The protective measures ,specified in Annex B, the use ofobstacles and placing out of reachshall only be used in installationsaccessible of skilled or instructedpersons or of persons underphysical supervision of skilled orinstructed persons.”

Agreed in principle withchange of “may” to “shall”.

30 DE 410.3.4 1st

sentenceE For alignment with Annex B, B1 amend the

sentence so as to read as follows:The protective measures, specifiedin Annex B, i.e. the use ofobstacles and placing out of reachshall only be used under thecontrol or supervision by skilled orinstructed persons.

See 29.

31 DE 410.3.8 Note 2 E As a comment to the parallel Cenelec Enquirywe request the deletion of this note in the futureprHD 60364-4-41.

Delete for prHD 60364-4-41,because not applicable inEuropean countries.

Noted for CLC SC64A

32AT 411.1 T It is of high importance for the effectiveness of

fault protection in the whole installation, outsidethe building too, to give a corresponding remarkthat automatic disconnection must work as welloutside the zone of influence of the mainprotective equipotential bonding, normallyrealised only in a building.

For clarification we suppose to adda note below the 2nd dash:NOTE Precaution shall be takento ensure automatic disconnectionin every case of a fault and atevery point of the installation: thatmeans as well out of the zone ofinfluence of the main protectiveequipotential bonding.

Not necessary.No change.

33 DE 411.1 NewNote-

Note ofsubclause 411.2.1

E We request to introduce after the 2nd indent anew note with the wording of the note tosubclause 411.2.1

Reason: The wording of the note to 411.2.1

Transfer note from 411.2.1 to411.1

Accepted in principle butdelete “without additionalrequirements”


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on each comment submittedbelongs generally to Clause 411 and shouldtherefore be placed under subclause 411.1General.

34 DE 411.2.1 New para T We request the introduction of the followingwording as a 2nd paragraph :

Reason: to comply with the rules of the basicsafety standard IEC 61140.

In industrial and in public supplysystems the application of basicprotection in compliance withAnnex B is permitted.

Add: “or where appropriateAnnex B”

35 DE 411.2.1 Note E Delete the note which should be transferred to411.1 after 2nd indent

Delete See 33.

36 DK 411.3.1.1 Firstparagrap

h

E Delete the hyphen between thewords “conductive” and “parts”.

Accepted, second line only

37 DE 411.3.1.2 Note E Replace Part 54 with:

Add missing comma in the title of part 5-54 afterarrangements:

Part 5-54

Earthing arrangements, protectiveconductors and protectivebonding.....

Accepted

38 NL 411.3.1.3 T Change “Each circuit” into “Each final circuit” Each final circuit shall haveavailable a protective conductorconnected to the relevant earthingterminal

Not accepted.

39 CH 411.3.1.3 E Clarify the sentence Each circuit shall have available acircuit a protective conductorconnected to the relevant earthingterminal

Accepted.

40 DE 411.3.1.3 E For better understanding amend to read: Each circuit shall have available aprotective conductor to the relevantearthing terminal.

See 39.

41 DK 411.3.1.3 E Too many words Delete the words “circuit a”. See 39.42 NL 411.3.1.3 E delete the words “ a circuit” See 39.43 BE 411.3.2.1 T After NOTE 3, add the following text : “The

Belgian National Committee asks for thefollowing “Certain Countries Conditions”, inCENELEC , A-deviation : § 411.3.2.3 is notapplicable in Belgium. The Belgian Wiring Rules(AREI- RGIE) don’t specify differences inautomatic disconnection times betweendistribution circuits and final circuits

Noted for CLC SC64A

44 DK 411.3.2.1 Secondline

E Not all the supply conductors need to bedisconnected.

Replace “the supply to” with “oneor more of the line conductors

Accepted in principle,amend as follows:


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on each comment submittedAlign the text with definition 826-3-18 p.t.document IEC TC 1/1879/CDV.

supplying...”. 411.3.2.1 Except asprovided by 411.3.2.4,411.3.2.5 and 411.3.2.6,a protective device shallautomatically interruptthe supply to the lineconductor of a circuit orequipment in the eventof a fault of negligibleimpedance between theline conductor and anexposed-conductive-partor a protective conductorin the circuit orequipment within thetime required in411.3.2.2, 411.3.2.3 or411.3.2.4.

45 DE 411.3.2.1 Notes 1and 2

E Delete in both notes the words:Reason : to avoid confusion.

....and voltage .... Accepted

46 SE 411.3.2.1 Note 2 E/T As long as the different parts 7 have not beenup-dated a reference to the disconnecting timevalues of former Table 41C should be included

A rewording of former 413.1.7.1should be introduced.

Not necessary.

47 DE 411.3.2.1 Note 3 E Replace “ is not usually required” with:

Reason: Better understanding

...is usually not required...... Withdrawn

48AT 411.3.2.2 T It is not understandable to protect plugged in

equipment (e.g. a refrigerator) and fixedterminated appliances (e.g. a kitchen range) bydifferent disconnecting times. Therefore by ourmeans, it is necessary to change subcl.411.3.2.3:

The maximum disconnecting timestated in Table 41A shall beapplied to final circuits supplyingevery kind of equipment.

Amend to “ to final circuitsnot exceeding 32A”.

49 BE 411.3.2.2 T The Belgian National Committee asks thefollowing “Certain Countries Conditions”, inCENELEC, A-deviation : the last column Uo >400 V is not applicable in Belgium. Above 400 V,the Belgian safety curve as given in the Belgian

Noted for CLC SC64A


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on each comment submittedWiring Rules (AREI-RGIE) article 31.03 (AR/KB.2000-05-07) applies.

50 FR 411.3.2.2 T The disconnecting times given in table 41A onlyapply to circuit supplying socket-outlet or handheld equipment. It is understood that suchequipment may be grasped for a certain timeand the chance of having an insulation duringthis time has been considered. But there aremany other cases where people touch for a longperiod of time some exposed-conductive-part.This is the case for all tool machine used inindustry. The case where the person causes thefault when touching the equipment has also tobe considered. The disconnecting time as givenin table 41A should apply to all final circuits.

The only table 41A is now available for allsystem earthing, which simplifies the text. But onthe other hand, its application becomes morecomplicated because segregation has to bemade between socket-outlets liable to supplyclass I hand held equipment from the othertypes of socket-outlets.

To modify the text as follows :The maximum disconnecting timestated in table 41A shall be appliedto all final circuits.

See 48.

51 PL 411.3.2.2 lines 2-3 T The provision of this subclause should bechanged. The times given in table 41A shouldapply to all final circuits.

See 48.

52 DE 411.3.2.2 Table41A

T In the column for d.c. and the voltage range50<U0 <= 120 replace for TN and TT the time of5s by *) and introduce below the table 41A thefollowing explanation for *) :

Reason: see comment no. 67 to 64/1212/CDwhich was accepted in WG9

*) Disconnection may be requiredfor reasons other than electricshock.

Confirm as previouslyagreed

53 ES 411.3.2.2 New noteof Table

41A

T A new note, clarifying the use of RCDs in TTsystems according to its product standard andaccording to 411.5.3, should be included.

Add the following noteNote2: Where an RCD is used asdisconnecting device, the specifieddisconnecting time refers to aresidual fault current of not lessthan 5I∆n

No change, see existingnote to 411.5.3

54 DE 411.3.2.2 3rd line E Replace “ portable equipment” with: ..... mobile equipment..... See 48.


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Reason : to align with IEV 60050-826 term 826-07-04 ( see 1/1879/CDV)The term “portable equipment” has beendeprecated according to 826-07-04.

55 DE 411.3.2.2 Table41A

Last linefor TTLastthree

columns

ETo add missing dimension for the time: “ 0,2s ; 0,04s ; 0,1s “

Accepted

56 DE 411.3.2.2 Table41A

E Introduce legend for Uo Uo is the nominal a.c. or d.c. line toearth voltage

Accepted

57 DE 411.3.2.2 Table41A

E Introduce above the line “ system “ an additionalbox with the following wording:

If this is agreed all the dimensions “s” belongingto the time values should be deleted.Furthermore, the title of the table 41A could thenbe deleted.

Maximum disconnection times inseconds

See 55

58 NL 411.3.2.2 Table41A

E Add some “s” in the table See 55

59 NL 411.3.2.2 E Add a note to table 41AUo is the nominal a.c. or d.c. line to earthvoltage in volts

See 56

60 AT 411.3.2.3 T Furthermore, it is not acceptable and technicallynot correct to give way for a disconnecting timeup to 5 s in consumer installations bearing inmind that in TT-systems in case of an insulationfault at any point of the installation a faultvoltage up to 90 per cent of the nominal voltageto earth will appear in the whole installation,therefore in all final circuits too.

Modify 411.3.2.3 as follows:For distribution circuits adisconnecting time not exceeding0.4 s in TT systems and 5 s in TNsystems is permitted for a voltagerange 120 V < U0 ≤ 230 V.

Agreed.5 seconds for TNdistribution circuits,1 second of TT distributioncircuits circuits,

see new text. Table41.1 – Maximum

disconnection times

System

50 V < Uo ≤≤≤≤ 120 Vs


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120 V < Uo ≤≤≤≤ 230 Vs

230 V < Uo ≤≤≤≤ 400 Vs

Uo > 400 Vs

a.c.

d.c.

a.c.

d.c.

a.c.

d.c.

a.c.

d.c.

TN

0,8

note 1

0,4

5

0,2

0,4

0,1

0,1

TT note 2

0,3

note 1

0,2

0,4


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0,07

0,2

0,04

0,1

Where in TT systems theinterruption is achievedby an overcurrentprotective device andthe main protectivebonding is connectedwith all extraneous-conductive parts withinthe installation, themaximum disconnectingtimes applicable to TNSystems may be used.

Disconnection may berequired for reasonsother than protectionagainst electric shock.

Where U is the nominala.c. or d.c. line to earthvoltage.

411.3.2.4 In TTsystems a disconnectingtime not exceeding 1 s ispermitted for distributioncircuits and for circuitsnot covered by411.3.2.2. Where in TTsystems the interruptionis achieved by anovercurrent protectivedevice and the main


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on each comment submittedprotective bonding isconnected with allextraneous-conductiveparts within theinstallation, themaximum disconnectingtimes applicable to TNSystems may be used.

61 FR 411.3.2.3 T As a consequence of France comment number4.

To modify the text as follows :A disconnecting time notexceeding 5 s is permitted fordistribution circuits, and for circuitsnot covered by 411.3.2.2.

See 60.

62 IT 411.3.254

T We propose that a maximum value be definedfor the time permitted for the reduction of theoutput voltage of the source to 50 V a.c. or 120V d.c.

Introduce, in the fourth line, afterthe words “is reduced”, thefollowing words “, in a time lessthan 5 s”.

Accepted.

63 CH 411.3.2.5 E In no case or situation, the Voltage at the PEmay be larger than 50V

If a circuit contains at the sametime fixed connected equipmentwith a disconnection time of 5 sand such with 0,4 s, it is to beensured that in the case of an errorin the circuit with the disconnectiontime of 5 s the voltage drop at thePE does not exceed 50 V.If this can not be fulfiled, thedisconnection time according to411.3.2.2 must be applied.

Not necessary, see 48.

64 NO 411.3.3 T This clause seems to be located on a wrongplace in the document. The requirement as it isnow is valid for socket-outlets in every kind ofdistribution system, also for IT where thedisconnection of a first fault in many cases is notwanted (for example in hospitals). We thinkthese requirements should be valid for TN-systems and partly also for TT-systems

Move the clause to belong to411.4, being a new clause 411.4.4.

Modify the second bullet of411.5.2:“- overcurrent protection devices,with additional protection of socket-outlets in accordance with 411.4.4”

Not accepted, speciallocations can be exemptedby Part 7.

65 NO 411.3.3 T We disagree that there should be a generalrequirement for RCD protection of socket-outlets. We notice that such a requirement

Amend the first paragraph:

“In a.c. systems in BA2 areas,

No change.See 74.


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on each comment submittedalready exist for different special locationshandled in Part 7. We think it is reasonable tohave such a general requiremement for BA2areas.

additional protection …”

66 SE 411.3.3.1 G In Sweden not only the socket-outlet but thewhole circuit shall be protected.In Sweden additional protection shall beprovided for socket-outlet circuits that may beused by ordinary persons.

Add a note:NOTE : In Sweden the final circuitsof electrical installations indomestic dwellings, schools andday care centres for children shallbe protected by residual currentprotective devices with a ratedoperating residual current notexceeding 30 mA. Certain parts ofthe installation, where aninterruption of the supply maycause serious damage, may beexcluded from the protection.

See 74.

67 FI 411.3.3.1 T Socket outlets located outside should beprotected with an RCD even if they are intendedto use by skilled or instructed people.

There is no need to have an RCD protection forsocket outlets located inside a building andsupplied by TN-system.

Especially RCDs should not be used for circuitssupplying food freezers or other such load,where the absence of supply could causehazard.

Chance wording "intended to useby ordinary persons" by " locatedoutside"

See 74.

68 NZ 411.3.3.1 T There in no IEC standard for SRCDs.The option of an SRCD will not protect theupstream circuit.

Delete note 1. See 71.

69 PL 411.3.3.1 T Replacement of RCD 30 mA installed inswitchboard by those installed in the socket-outlets may be dangerous and should not betaken in account without specially determinedconditions. Moreover, SRCD are not yetstandardized at the IEC level and RCD insocket-outlet does not protect the upstreamelectrical circuit.

Delete this subclause. Delete note 1. See 71.

70 BE 411.3.3.1 First dash T “socket-oulets with a rated current not exceeding Noted for CLC SC64A


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on each comment submitted20 A, intended for use by ordinary persons…”.The Belgian National Committee asks for a“Certain Country Condition” (in CENELEC, A-deviation) :Add NOTE 3 : In Belgium, every electricalinstallation under the supervision of ordinaryperson must be protected by a RCD with a ratedoperating residual current not exceeding 300mA; for circuits supplying bathrooms, washingmachines, dishwashers, etc, an additionalprotection by means of a RCD with a ratedoperating residual current not exceeding 30 mAis mandatory; the above is valid for electricalinstallations of which the earthing resistance islower than 30 ohm; in case of earthingresistance higher than 30 ohm and lower than100 ohm, additional RCDs with a rated operatingresidual current not exceeding 100 mA must beprovided. An earthing resistance higher than 100ohm is not permitted.Reason : see AREI/RGIE (Belgian Wiring Rules)art. 85 & 86.

71 FR 411.3.3.1 Note 1 T See comment 5 on 415.1 To delete the note 1. Accepted.72 PL 411.3.3.1 Note 2 T Reference to national rules (in this case to the

rules of Spain) in International Standards iswrong practice, which should be avoided.

Delete Note 2. No change. In somecountries clauses arepermitted.

73 IE 411.3.3.1

E Add Note 3: “In Ireland, additional protection isrequired for socketoutlet circuits with rated current up to 32A”

Noted.

74 UK 411.3.3.1 E A form of words that allowed specialist socketoutlets supplying fixed equipment (e.g. luminairesupport couplers) to be excluded and socketssupplying certain items of stationary equipmentwould be hepful.

Amend as follows:

In ac systems additional protectionby means of a residual currentprotective device (RCD) inaccordance with 415.1 shall beprovided for:-sockets with a rated current notexceeding 20 amps, intended forgeneral use by ordinary personsand

Accepted in principle, butadd new note:“In this context a distinctionmay be made betweensocket outlets for generaluse and socket outletsprovided specifically forconnection of a particularitem of equipment.”(Sic).


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on each comment submitted75 SE 411.3.3.1 First dash E The word “intended” gives a vague interpretation

of this text.socket-outlets with a rated currentnot exceeding 20 A, that may beused by ordinary persons and

See 74.

76 ES 411.3.3.1 Note 1 E Note 1 is a general note of the subclause, notspecific of the first indent.

RCDs for additional protection may be installedin the socket outlets or in the distribution board.The text is not clear.

Move note 1 to the end of thesubclause.

The note should read as follows:Note: This additional protectionmay be in the socket–outlets(SRCD) or in the distribution boardthe circuit supplying the socket-outlet.

See 71.

77 DE 411.3.3.1 2nd indent E/T Replace “ portable equipment” with:

Reason : to align with IEV 60050-826 term 826-07-04 ( see 1/1879/CDV)The term “portable equipment” has beendeprecated according to 826-07-04.

..... mobile equipment..... Accepted, and delete “finalcircuits for”

78 UK 411.3.8 Note 1 E Ammend:This exemption applies,

Accepted for 410.3.8

79 DE 411.4. Newsubclaus

e:

VoltageBa-lance

accor-ding toclau-se

413.1.3.7in IEC

60364-4-41:

2001-08

T Introduce the following wording as a newsubclause unless the compromise wording ofthe WG9 Clearwater/USA meeting is agreed forinclusion in the next draft:

Reason: This important requirement from theexisting IEC 60364-4-41 may not be lost.If this is not agreed we request a some countriesnote for Germany stating that this requirementshall be met.

FOR CENELEC ONLY:If this is not agreed we request a specialnational condition stating the requirement.

In exceptional cases where a faultmay occur between a lineconductor and earth, e. g. in theuse of overhead lines, the followingcondition for the system earthingRB shall be fulfilled:

V50V50

0E

B

−≤UR

R

Note: By this condition is ensuredthat the protective conductor andthe exposed-conductive-parts ofequipment connected to it do notreach a voltage to earth exceedingthe conventional touch-voltage limitof 50 V

See 4

80 NO 411.4.1 1. ph. T In Norway the use of a PEN-conductordownstream the main distribution board is

Delete the phrase: No change, the clausecovers the PEN in the


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on each comment submittedprohibited. “… of a combinded protective

earthing conductor and neutralconductor (PEN).”

public supply network.

81 FR 411.4.1 1st

paragraph

T The system earthing may be either in a.c. or ind.c.in a.c. system a PEN conductor may be used,in d.c. system PEM or PEL conductors may beused.

To modify the 1st paragraph asfollows :Exposed-conductive-parts of theinstallation shall be connected by aprotective conductor to the mainearthing terminal of the installationwhich shall be connected to theearthed point of the power supplysystem through a protectiveconductor (PE) or a combinedprotective earthing and neutralconductor (PEN).

Accepted, also delete “Inno case shall the lineconductor…..”

82 ZA 411.4.1 Note 2 T The recommendation in the note is understoodand accepted. However, for regions whereinstallations are not REQUIRED to be earthed atthe service entrance, the provision of an earthconnection at only one or two installations in aregion supplied from the same transformer,could result in a potential hazard. Such a hazardcould result from the possibility of excesscurrents originating from all other installations onthe same transformer being caused to flow inthis single (or few) earth connections.

Introduce a further note of cautionfor cases where there is no generalrequirement for the provision of anearth connection at the serviceentrance to an installation.

Add: “ It is recommendedthat protective conductors(PE or PEN) should beearthed where they enterthe building taking accountof diverted neutral current”.

83 FR 411.4.1 New note T There is no requirement concerning the TN-C-S.In this system earthing the TN-C part has not tobe downstream the TN-S part of theinstallations.

To add the following NOTE 2 :In the same electrical installation,part in TN-C and another part inTN-S may be erected in serieswithout galvanic separationprovided that any TN-C part isused on the line side of any TN-Spart (TN-C-S system).

Not necessary, seerevision of 630364 Part I

84 CH 411.4.1 VoltageBalance

E According to the discussion in Clearwter, theSwiss National Commitee suprts to take over theparagraph 413.1.3.7 of the valid IEC 60364-4-41

Voltage Balance according clause413.1.3.7 of the valid IEC 60364-4-41

See 4

85 DK 411.4.1 Second E The requirement covers both neutral and Add “or midpoint” after “point”. Accepted in principle, see


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on each comment submittedparagraph, second

line

midpoint and should be amended accordingly. 81.

86 NO 411.4.2 T In Norway the use of a PEN-conductordownstream the main distribution board isprohibited.

Amend the paragraph as follows:

“In fixed installations upstream ofthe main distribution board, asingle conductor may serve bothas a protective conductor andneutral conductor (PEN)-conductor) provided that therequirements of 543.4 aresatisfied. No switching or isoltaingdevice shall be inserted in thePEN-conductor. Downstream ofthe main distribution board shallseparated protective conductor(PE) and neutral conductor (N) beapplied.”

Not necessary in general.

87 CH 411.4.2 E Add the Note for Switzerland In Switzerland the main building-circuit-breaker with integratedisolating device in the PEN-conductor forms the interfacebetween the network and theinstallation of building.

Add as an in somecountries [Switzerland]note.

88 FR 411.4.3 T To apply the requirement of this subclausemeasurement of Zs is to be done.This is not possible when designing theinstallation. During the designing stageestimation of the disconnecting conditions maybe done. This can only be assumed provided thePE or PEN or PEM always stays in the vicinity ofthe line conductors.

During the designing stage, the internal zerosequence impedance of the power supply mayhave a major influence on the insulation faultloop impedance. This may depend on thetransformer coupling or if generators are used.

To add the following notes at theend of the subclause :

NOTE 1 – Installation fault loopimpedance calculation is possibleonly if the PE, PEN, PEM or PELremain, in the whole installation,beside the line conductors.

NOTE 2 – The installation faultloop impedance may greatly varyaccording to the power supplycharacteristics. Transformercoupling such as YnYn are not

Not agreed, loopimpedances must be lowenough for devices tooperate.

True, this must be allowedfor in the design.


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on each comment submittedcompatible with the automaticdisconnection of supply measureusing overcurrent protectivedevices.

89 IT 411.4. 3 T We realize that prospective residual faultcurrents higher than the rated residual operatingcurrent of the RCD occur also in TN systems.We realize also that these currents maygenerate, in TN-C-S systems having ratedvoltages higher than 400/230 V, in the case of afault, between a phase conductor and theneutral conductor a dangerous voltage on thePEN conductor may appear.

Introduce, in a new paragraph tothis clause, the same text of theNOTE reported in Clause 411.5.3,adding however the following Note:“ In TN-C-S systems having ratedvoltages higher than 400/230 V, inthe case of a fault between aphase conductor and the neutralconductor, voltages exceeding 50V a.c. or 120 V d.c. may occur onthe PEN conductor: the fault loopshould be so arranged as to avoidsuch dangerous voltages.”

Agreed, delete “rated” and“I∆n”.

Note not agreed, faultvoltages will exceed 50Vfor the times allowed.

90 CH 411.4.4 Note E Where a RCD are used for fault protection thecircuit also has to be protected by anovercurrent protective device in accordance withChapter 43

Read:Where a RCD is used for faultprotection the circuit must also beprotected by ...

Withdrawn

91 DE 411.4.4 Note E In the second line replace “Part 43” with: Part 4-43 Accepted92 IE 411.5.1 2nd para E Network power supplies are outside the scope.

The term “mid-point” should be clarified in thiscontext – does it refer to “Reduced LowVoltage” which has the centre-point earthed?

No change

93 UK 411.5.1 Note E Ammend:The direct connection of

protective conductors to an earthelectrode is usually not possible forpractical reasons.

Accepted

94 FR 411.5.2 T The use of overcurrent protective devices in TTsystem may be only used in very specificlocations where earth resistance is very low. Ithas to be noticed that below 1 Ω theirmeasurement becomes very difficult and canonly be made with a large tolerance. It is notadvisable to include such a specific case in thegeneral rules, and should be covered by a note.

Delete the 2nd dash.Delete notes 1 and 2.

No changeAccepted in principleAmmend asfollows:411.5.2 In TTsystems, the followingprotective devices maybe used for faultprotection:

– residual current


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on each comment submittedprotective devices(RCDs);

– overcurrentprotective devices, wherea suitably low value of Zs isassured.

95 FR 411.5.2 Note 3 T The text of the Country note available for theNetherlands may be misleading.166 Ω equals to 50 V/0,3 A. This means that inthe Netherlands RCDs rated up to 300 mA maybe used. But if the earth resistance can be aslow as practical, overcurrent protective devicesmay be used.The note, where placed, concerns the use ofovercurrent protective devices in TT systems atthe request of the Netherlands NationalCommittee. It may be understood that up to 166Ω, overcurrent protective devices are usable inTT !

The Netherlands members have togive explanations on the text oftheir Country’s note.

See 99

96 PL 411.5.2 Note 3 T Reference to conditions of one country (in thiscase to the Netherlands conditions) inInternational Standards is abnormal practice,which should be avoided.

Delete Note 3. See 99

97 DE 411.5.2 Note E In the second line replace “Chapter 43 “ with: Part 4-43 Accepted98 CH 411.5.2 Note E Where a RCD are used for fault protection the

circuit also has to be protected by anovercurrent protective device in accordance withChapter 43

Read:Where a RCD is used for faultprotection the circuit must also beprotected by ...

See 90

99 NL 411.5.2 Note 3 E delete the existing note 3 Accepted100 ES 411.5.3

and411.5.4

T In TT systems, low values of Zs are not easy toobtain during initial installation and it is moredifficult to maintain them during the life of theinstallation.For TT systems, compliance with the formulagiven in 411.5.4 is enough to assure the correctfunctioning of the protective devices.

Eliminate clause 411.5.3 No change, it is necessaryto relate theoperation(interruption time)of the protective device totable 41.1

101 FR 411.5.3 T This condition is identical as for TN systemwhere the fault current is a short-circuit. If the

fault current in TT becomes such a short-circuit,then the system becomes a TN system. The

To delete this subclause. See 100


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on each comment submittedspecificity of TT system is that the fault current is

limited by the earth electrode resistance.When the fault current is limited the fault may

not becomes quickly a true fault as in TNsystem. It takes time for the fault current to burn

the insulation. Consequently the fault voltageinduced by the limited fault current may becomehazardous before the fault current reaches thetripping threshold of the overcurrent protective

device. When RCD are used in a « normal » TTsystem, it is impossible to measure the real Zs

values because it has to include the faultimpedance which varies with the time.

This is admitted in the NOTE 1 of 411.5.4. Thefault impedance value is not related to the type

of protective device.102 IT 411.5.3 T We propose to transfer the content of the Note

into a paragraph of the clause.Transfer the content of the Noteinto a new paragraph of the clause.

No change

103 NL 411.5.3 T Introduce as note or SNC the requirement asused for decades in the Netherlands

Introduce a new note 2 with thefollowing text:Netherlands: In TT systems faultprotection is ensured provided theimpedance of the fault loop doesnot exceed 30/In when using fusesas protective devices or 40/Inwhen using MCBs with Bcharacteristic

Noted for CENELEC.

104 PL 411.5.3 T This subclause corresponds to TN system andnot to considered TT system

Delete the subclause. See 100

105 NL 411.5.3 E Change in the formula “/a” into “Ia” Editorial, accepted106 DK 411.5.3 Explanati

on to IaE Use the same wording as in 411.4.3 Replace “amps” with “amperes”. Accept

107 DK 411.5.3 Explanation to U0

E Replace “voltage to earth” with“line to earth voltage”.

Accept

108 DE 411.5.3 Note2nd line

E In the second line of the wording the word “ may“ should be deleted: may

Accept

109AT 411.5.4 T The relevant requirement is given in 411.5.3.

Delete 411.5.4 No change, see 100

110 PL 411.5.4 Formula T The formula in this subclause is too conservativeand seems to be in contradiction with previous

Delete the formula and the wholesubclause.

No change, see 100


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on each comment submittedrequirements. The change of the symbol from ZS

to RA should be treated as an anomaly.111 DE 411.5.4 1st

sentenceE Amend the wording so as to read as follows: When a residual current operating

device (RCD) is used asdisconnection device for faultprotection the following conditionmay be fulfilled instead of therequire-ment in 411.5.3 :

Accept in principle – seenew text:411.5.4 When aresidual currentprotective device (RCD)without intentional timedelay or with a ratedtime delay not exceeding60 ms is used for faultprotection the followingcondition may be fulfilledinstead of 411.5.3:

RA x I∆n ≤ 50 V

112 FR 411.5.4 1st

paragraph

E In combination with the France commentnumber 12.

It is admitted that the measurement of the earthelectrode resistance may be sometime difficult

(e.g. in cities). The measurement of Zs issomewhat easier.

Consequently Zs could replace RA in thecondition of 411.5.4.

Replacing Zs by RA is conservative in thecondition of 411.5.4 because Zs ≥ RA.

To modify as follows :The residual current protectivedevice (RCD) shall fulfil thefollowing condition :RA x I∆n ≤ 50 VRA is the sum of the resistance inohms of the earth electrode andthe protective conductor for theexposed conductive-parts,I∆n is the rated residual operatingcurrent in the RCD.NOTE 1 - Fault protection isprovided in this case also if thefault impedance is not negligible.NOTE 2 - Where discriminationbetween RCDs is necessary see535.3.NOTE 3 – Where RA is not known,it may be replaced by the value ofZs.

To renumber this subclause

Note 3 accepted asmodified, also see newtext:411.5.4 When aresidual currentprotective device (RCD)without intentional timedelay or with a ratedtime delay not exceeding60 ms is used for faultprotection the followingcondition may be fulfilledinstead of 411.5.3:

RA x I∆n ≤ 50 V


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on each comment submitted411.5.3

113 NL 411.5.4 E …… of the RCD in amperes. See 6114 NL 411.5.4 E Introduce the deleted note of 411.5.2 as note 3 In the Netherlands the resistance

of the earth electrode shall be aslow as practical, but in any casenot exceed 167 ohm.

Noted for CENELEC.

115 NO 411.6.1 T In Norway the main public distribution system is230 V IT (without N conductor) The Norwegian

NC consider the present wording not to besatisfying for public distribution systems. The

present wording and requirements is completelysatifying for those IT installations that have theirown distribution transformer (i.e. a separate ITnetwork). The problem in the public distributed

IT network is not necessarily the occurrence of afiirst fault, but the occurrence of the second fault,

each fault in two different installations.Such afault condition may give high fault currents, but

not so high that the overcurrent protectiondevices trips. The situation is dangerous and an

increased risk of fire. The norwegian NC hastherfore introduced a requirement for clearance

of the first fault in our national standard.

Modify the second paragraph:

“The fault current in the event of asingle line to an exposed-conductive-part or to earth will below and normally less than thetripping current for overcurrentprotective devices. However, sucha fault in one installation galvanicconnected to a IT distributionnetwork will provide higher touchvoltages for all installationsgalvanic connected to the samedistrubution network.

For final circuits in IT installationsgalvanic connected to a public ITdistribution network and wheremore installations shall be (or is)gavlanic connected to the samedistribution network, shall either:

every single lin to eart faultshall be disconnectedaccording to table xxx; or

the circuit shall apply theprotetive measure of ; or

the circuit shall apply theprotective measure of 413.If the device providing theelectrical separation is notloacted at the beginning ofthe circuit, the protectivemeasure of 412 shall beapplied for that part of thecircuit leading to the

Norway to propose somecountries note toindicate specialconditions.


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on each comment submittedelectrical spearationdevice.

For all other circuits thedisconnection of the supply inacordance with 411.3.2 is notimperative provided:

the condition in 411.6.2 isfulfilled; and

provisions to avoid risk ofharmful pathophysiologicaleffects on a person incontact with simultanouslyaccessible exposed-conductive-parts in theevent of two faults existingsimultanuously is taken.”

116 DE 411.6.1 1st

sentenceT We request a specification for what may be

considered as high impedance e.g. by inclusionof a new note after the first sentence reading as

follows:

Note- The necessary value of thehigh impedance depends on thesize of the system. In general avalue of greater than 250 Ohm/Voltrelated to the rated system voltagemay be expected.

Only add word “sufficiently”before “high” in the firstsentence

117 DE 411.6.1 3rd

sentenceT By inclusion of the proposed new note to the 1st

sentence this sentence can be deleted.delete without replacement See 116

118 FR 411.6.1 3rd

sentenceT The zero sequence impedance only needs to

have a high value at the frequency used by thesystem. It may have lower values at other

frequencies.

To modify the sentence as follows :The latter may be connecteddirectly to earth if the resultingzero-sequence impedance issufficiently high at the systemfrequency.

Accept

119 DE 411.6.1 4th

sentenceT For clarification in view of the 1st sentence

amend the wording so as to read as follows:Where no neutral point or mid-point exists the earthing through ahigh impedance may be providedby earthing a line con-ductor.

No change

120 FR 411.6.1 Note T It should be useful to give guidance for theselection of the impedance in order to beappropriate with the requirement of the

installation.

To add the following sentence atthe end of the NOTE :In general, the impedance value isequal to 4 to 6 times the value ofthe rated voltage of the installation;e.g. about 1000 Ω for installations

See 116


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on each comment submitted230/400 V - 50Hz.

121 DE 411.6.1 Note E For better understanding improve the wording soas to read as follows:

Note- The earthing through a highimpe-dance is serving to reduceovervoltages or to damp voltageocscillations. A high impedanceearthing may be provided by theinternal a.c. resistance of aninsula-tion monitoring deviceaccording to IEC 61557-8.

No change in chapter 41,consider for part 5-53under insulation monitoringdevices.

122 UK 411.6.2 Note E Ammend:The direct connection of protectiveconductors to an earth electrode isusually not possible for practicalreasons.

Accept

123 DE 411.6.2 legend toRA

E For clarification amend the wording to read asfollows:

Is the sum of the resistances inOhms of the earth electrode andthe protective conductor for to theexposed-conductive-parts.

No change

124 DE 411.6.2 LegendtoId

E Amend the wording to read as follows: Is the fault current in amps of thefirst......

See 123

125 DK 411.6.2 Explanation to Id

E Use the same wording as in 411.4.3 Replace “amps” with “amperes”. Accept

126 NO 411.6.3 T We disagree that insulation monitoring shall onlybe used when the IT system is used for reasonsof continuity. The IT system may also be used

for other reasons (as in Norway). The monitoringshould in any case take place. However, due toour requirements for disconnection of the first

fault. An modification is needed related toinsulation monitoring

Modify the first and secondparagraph to:

“Circuits downstream the maindistribution board in a buildingwhere the disconnection of the firstfault according to 411.6.1 is notrequired, shall be:- insulation monitored for

indication of a first fault from alive part to exposed-conductive-part or to earth; or

- proteted by a RCD with a ratedoperating residual current thatmay exceed 30 mA and/or witha time delay; or

Accept in principle, seenew text:411.6.3 Except where aprotective device isinstalled to interrupt thesupply in the event ofthe first earth fault, aninsulation monitoringdevice shall be providedto indicate theoccurrence of a first faultfrom a live part toexposed-conductive-parts or to earth. Thisinsulation monitoringdevice shall initiate an


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on each comment submitted- protected according the 412.

A monitoring device , if used, shallinitiate an audible and/or visualsignal which chall continue as longas the fault persists. If there areboth audible and visual signals it ispermissible for the audible signalto be cancelled, but the visualalarm shall continue as long as thefault persists.”

audible and/or visualsignal which shallcontinue as long as thefault persists.

127 DE 411.6.3 1st

sentenceT Amend the wording so as to read as follows:

Reasons: The insulation monitoring devi-ce hasimportance regarding safety not only in ITsystems applied to ensure the continuty of

supply in case of a first fault but also for other ITsystems erected for other reasons, e.g. in case

of portable generating sets. The insulationmonito-ring device explores a symmetric lower-ing of the insulation ability and that is another

advantage of its application besides the very lowfault current in case of a first fault.

In IT systems an insulationmonitoring device shall beprovided to indicate theoccurence...........

See 126

128 DE 411.6.3 New note T Introduce the following new note asnote 1:

Reason:A response value of the insulation monitoringdevice is missing. A recom-mended response

value should not be stated in part 5-53 as earlierdiscussed in WG9 but in part 4-41.

Note 1- It is recommended toselect a response value of 100Ω/V rated supply voltage for theinsulation monitoring device.

See 121

129 DE 411.6.3 Note E The existing note should be note 2 and itswording amended so as to read as follows:

Reason: Advice regarding the suitableinvestigation of faults is missing and should be

given.

Note2 – It is recommended toinvestigate and eliminate as soonas possible a first fault. Theinvestigation of the reason of a firstfault may be supportet by usingequipment according to IEC61557-9.

No change, see 121

130 DE 411.6.4a)

1st line onpage 12

E For compliance with IEV 50060-826 amend thewording so as to read as follows:

......where the neutral conductor isnot.....

Accepted


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on each comment submittedReason: see 826-05-07

131 DE 411.6.4a)

4th line onpage 12


Reason : see 826-05-07 and 826-05-08

...or where the neutral conductor or mid-point conductor is distributed:

Accepted

132 DE 411.6.4a)

legend toU0


Reason : see 826-05-07 and 826-05-08

U0 is the nominal a.c. or d.c.voltage in Volts between lineconductor and neutral conductor ormid-point conductor as appropriate

Accepted

133 DE 411.6.4a)

Note E For better explanation of the require-mentsreplace the note by the following notes 1 to 3 :

Note1- The time stated in Table41A of 411.3.2.2 for the TN systemis applicable for for both distributedor non-distributed neutralconductor or mid-point conductor.

Note 2 – It is taken into account bythe factor 2 in both formulas that incase of a simultaneous occurenceof two faults the faults may exist indifferent circuits.

Note3- For the fault loopimpedance ZS the most severecase should be taken into account,e.g. the existence of a fault on theline conductor at the source andsimultaneously another fault on theneu-tral conductor of a current-using equip-ment of the circuitconsidered.

Accept in principle. Needto check that definitionsare consistent with notes.

134 DK 411.6.4a)

Tenth line E Replace “mid-wire” with “midpointconductor”.

See 132

135 DK 411.6.4a)

Explanation to Ia

E Use the same wording as in 411.4.3 Replace “amps” with “amperes”. Accept

136 DE 411.6.4b)

T Replace the wording by the following newwording:

Reason:In 411.6.4 b) such IT systems are consi-dered

b) Where the exposed-conductive-parts are earthed in groups orindividually the following conditionapplies:

Accept


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on each comment submittedwhich in case of a first fault are comparable to a

TT system.Because the earthing in case of a first fault is notexactly defined it may not be permitted to apply

the condition for the fault loop impedance asstated in the formula of 411.5.3.

In this case the application of only the conditionstated in the formula of 411.5.4 is reasonableirrespective overcurrent protective devices orresidual current operating devices are used.

RA x Ia ≤ 50VWhere:RA is the sum of the resistances ofthe earth electrode and theprotective conductor to theexposed-conductive-parts, Ia is the current causingautomatic disconnection of thedisconnection decive in a timecomplying to that for TT systems inTable 41A of 411.3.2.2 or in a timecomplying to 411.3.2.3.

If compliance to the requirementsof b) is provided by a residualcurrent protective device (RCD)compliance with the dis-connectiontimes required for TT systems inTable 41A may require residualcur-rents significantly higher thanthe rated residual operating currentI∆n of the RCD applied (typically 5I∆n ).

137 DE 411.6.4b)

Notes 1and 2

E Both notes are relevant not only for 411.6.4 b)but also for 411.6.4 a)

For this reason transfer the content of notes 1and 2 to 411.6.5 , see our comment on the latter

subclause.

Delete notes 1 and 2 Accept

138 DE 411.6.5 Newnotes 1and 2

E/T We request the introduction of the following twonotes:

Reason: see our comment above on Notes 1and 2 of 411.6.4 b).

Note 1 – An RCD can only be usedto protect one circuit supplying onesingle current-using equipmentonly. For this reason everyindividual current-using equipmentis protected by a separate residualcurrent operating device (RCD).

Note 2 – Where a residual currentoperating device (RCD) with arated residual operating current notexceeding 30mA is used a tripping

Accept

Accept


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In case the new notes 1 and 2 are not agreedthe German National Committee requests theinclusion of the following some countries note:

For CENELEC only:In case the new notes 1 and 2 are not agreedthe German National Commit-tee requests the

following SNC:

of the RCD in case of a first faultcan not be excluded due tocapacitive leakage currents.

Note ( for CENELEC: SNC )– In Germany only IT systemstotally isolated from earth are used.For this rea-son a residual currentoperating device (RCD) may onlybe used to protect one circuitsupplying one individual item ofcurrent-using equipment.

Noted

139AT 411.7 T FELV cannot be classified as measure of

automatic disconnection of supply just becausethere is only basic insulation between primary

and secondary windings of the transformer. Themain feature is the low voltage in the secondary

circuits protecting in case of faults in thesecircuits. Only one type of fault – the fault

between the windings of the transformer – iseliminated by disconnection of supply.

Move 411.7 to 414No change in that it relieson automaticdisconnection of supply

140 DK 411.7.4 Note E To avoid confusion with “extra-low-voltage”asused in 414.

Replace “extra low voltage” with“FELV”.

Accepted

141 ES 411.7.5 T There is not IEC standard for plugs and socket-outlets for FELV systems.

This clause should be eliminated or replaced bya country note for those countries having such

standards.

Eliminate the whole clause orreplace it by a country note forthose countries having standardsfor plugs and socket-outlets forFELV systems.

No change, need toprevent use of generalsocket outlets for FELV

142 DE 412.1.2 2nd line E Replace “ in IEC 60364-7. “ with: .....in the standards of the IEC60364-7 series.

Accepted

143 DE 412.2.1.1 Footnote*

E According to IEC design rules the footnoteshould be placed at the bottom of this page.

Place footnote at page bottom Accepted

144 DK 412.2.1.2 Secondparagrap

h

E The symbol referred to is the protective earthearth and not the negated symbol as shown.

Put the word “ground” inparanthesis and add thereafter theword “negated”

Editorial, to be confirmed

145 DE 412.2.1.2 Lastsentence

E “Potective earth ground” is a symbol accordingto the IEC 60417 series with-out being crossed

out. By crossing out this symbol is no more



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on each comment submittedidentical but amended. It is not included in the

IEC 60417 series.For this reason amend the wording of the last

sentence so as to read as follows:IEC reference IEC 60417 – 5019:Protec-tive earth ground, butcrossed out.

146 DK 412.2.1.3 Secondparagrap

h

E The symbol referred to is the protective earthearth and not the negated symbol as shown.

Put the word “ground” inparanthesis and add thereafter theword “negated”



E “Potective earth ground” is a symbol accordingto the IEC 60417 series with-out being crossed

out. By crossing out this symbol is no moreidentical but amended. It is not included in the

IEC 60417 series.For this reason amend the wording of the last

sentence so as to read as follows:IEC reference IEC 60417 – 5019:Protec-tive earth ground, butcrossed out.


148 UK 412.2.2.2 2nd indent E Replace “screws” with “fixings” for more generalapplication


149 IT 412.2.4.1 T We propose that the rated voltage value of thewiring system be increased of one step, to

comply with the requirements of clause 412.2.

Modify the first dash as follows:“ - The rated voltage of the wiringsystem is at least 450/750 V, and”

Not accepted but see newtext.


E For correctness amend the wording so as toread as follows:

However, such a wiring systemshall be identified neither by thesymbol 5172 according to the IEC60417 series (XXX) nor by thesymbol 5019 according to the IEC60417 series, but the latter crossedout (YYY).

Accepted in principle, alsofor 412.2.1.2 and412.2.1.3.

151 CH 413.1.1 E to avoid missunderstandings:

add and between the 2 dashes as 411.1

add: and between the 2 dashes:- basic protection isprovided by basic insulation of liveparts or bybarriers and enclosuresin accordance with annex A andfault protection is providedby simple separation of theseparated circuit from other circuitsand from earth.

Accepted


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152 FR 413.1.2 New Note T The safety of this measure is based on the goodinsulation of the separated circuits.

To add the following note at theend of the subclause :This protective requirement shouldnot be used for the supply ofcurrent-using-equipment having olow insulation level.

Accept in principle – addthe following under 413.2:“Note: Where thisprotective measure isused, it is particularlyimportant to ensurecompliance of basicinsulation with the productstandard.”

153 AT 414 T A consequence of the recent results of researchgiven in IEC-479-working papers the equal

tolerable risk of harmful electric shock comparedto 50 V AC are 70 V DC.

The value of 120 V DC should bechanged to 70 V DC

No change - Underdiscussion in WG4

154 SE 414 Title E As extra low voltage is not a protective measurethe title can be misleading. SELV and PELV are

the protective measures.

Delete the brackets in the titleProtective measure: extra-low-voltage provided by SELV andPELV

Accept

155 FR 414.4.1 Note 1 T/E Put the French text in line with the English one. En particulier, une séparationélectrique au moins équivalente àcelle prévue entre lesenroulements primaire etsecondaire d'un transformateur desécurité de protection estnécessaire entre les parties activesdes matériels électriques tels querelais, contacteurs, interrupteursauxiliaires, et une partiequelconque d’un circuit de tensionplus élevée.

Accepted editorial

156 SE 414.1.1 E It is not evident from the text that all the threerequirements have to be fulfilled at the same

time.

Replace: in which protection is provided by:by:in which protection is provided byall the three measures:

Accept in principle, seenew text.414.1.1 Protection byextra-low-voltage is aprotective measurewhich consists of eitherof two different extra-low-voltage systems


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on each comment submitted– SELV , or– PELV.This protective measurerequires:

157 DE 414.1.1 Footnote*

E According to IEC design rules the footnoteshould be placed at the bottom of this page.

Place footnote at page bottom Accepted

158 DE 414.1.2 Note E For correctness amend the note to read: Note: In certain cases thestandards of the IEC 60364-7series limit the value of the extra-low voltage at a value lower than50V a.c. or 120V d.c.

Accepted

159 DE 414.4.2 T Amend the wording of the 1st sentence so as toread as follows:

Reason: By the operational insulation of theSELV circuit and the use of an additi-onal notspecified insulation a secure operation of liveparts from other circuits can not be achieved.

Therefore, live parts of other circuits shall haveat least basic insulation.

Add to the list of indents the following wordingas a 5th indent:

Reason: to adopt a further frequently usedwiring system

Protective separation of wiringsystems of SELV and PELVcircuits from live parts of othercircuits, which have at least basicinsulation, may be achieved by oneof the following arrangements:

- the wiring systems of othercircuits are in compliance with412.2.4.1

Accept as modified.

Accept.

160 ES 414.4.2 1st dash E In this case, the appropriate term for “non-metallic” is “insulating”.

The text should read as follows:SELV and PELV circuit conductorsshall be enclosed in an non-metallic insulating sheath orinsulating enclosure in addition tobasic insulation,

No change

161 PL 415 Note T This note is in contradiction with IEC 61140, 4.3stating that RCD 30 mA may be used as an

additional protection for basic protection (directcontact) and for fault protection (indirect contact)

Delete the note. Not accepted, see newtext.

162 DE 415 Note E Replace the wording in brackets with: ( see the standards of the IEC Editorial


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on each comment submitted60364-7 series)

163 FR 415.1 Note T This note needs to be consistent with IEC 61140§ 4.3 which give requirement for additionalprotection where an increased inherent risk

exists :Quote : « If the intended use implies an

increased inherent risk, e.g. for areas with a low-impedance contact of persons with earth

potential, technical committees shall considerthe possible need to specify additional

protection. Such additional protection may beprovided in the installation, in the system or in

the equipment.NOTE - In the case of low-voltage installations

and equipment, the use of residual currentdevices, with a rated residual operating current

not exceeding 30 mA, is recognized asadditional protection against electric shockwhere basic and/or fault protection is not

effective or by careless use of equipment. »

RCDs with I∆n ≤ 30 mA can be considered asadditional protection against basic and fault

protection.

To delete the text of the note.See also comment 18.

Accept

164 FR 415.1 Note T Erection of RCD’s is to be treated in chapter 53. Add a second sentence to thenote.“for erection of this the protectivemeasure see 531.2.1.9 and531.2.3”

See 163

165 DE 415.1 Note E Amend the wording so as to read as follows:

Reason: The use of only an RCD with a ratedresidual operating current not exceeding 30mA

is not considered as an agreed measure forbasic protection.

Note- The use of RCD`s isintended only to augment therequired basic protectiveprovisions.

See 163

166 FR 415.1.1 T To be consistent with the France commentnumber 20.

To modify as follows :The use of RCDs, with a ratedoperating residual current notexceeding 30 mA, is recognized ina.c. systems as additional

Accept


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on each comment submittedprotection in the event of failure ofbasic and/or fault protectiveprovisions or carelessness byusers.

167 FR 415.1.2 T To provide additional information. To add the following :The experience proves that normalbasic and fault protectivemeasures, which have preventivecharacteristics, may occasionallyfail, by lack of maintenance,normal or abnormal insulationwearing or carelessness.The use of Residual CurrentProtective device with a ratedoperating residual current notexceeding 30 mA may eliminatethe risk of electric hazard. TheRCD is designed to quicklydisconnect the concerned part ofthe electrical installation as soonas a very low residual currentoccur.

Not necessary. May beconsidered for a guide.

168 DE 415.2.2 Formulas E ISO/IEC Directives Part 3:1999, Subclause6.6.4.5:

”Inclined (italic) letters shall be used for- symbols for quantities,

- subscripts representing symbols for quantities,and

- symbols representing numbers.”

Write “R" in italic. Accepted, for R and I, see6

169 DK 415.2.2 Explanation to Ia

E Use the same wording as in 411.4.3 Replace “amps” with “amperes”. See 168

170 DK Annex A A.2.4Thirdindent

E Replace “1P2X” with “IP2X”. Accepted

171 NL Annex A A.2.4 E Change 1P2X into IP2X See 171172 NO Annex B B.1

2. ph.E The reference to 410.3.5 is wrong. Modify to “410.3.4”. Accepted

173 DE Annex B B.15th line

E Replace 410.3.5 with: 410.3.4 See 172

174 DE Annex B B.3.32nd line

E For correctness replace the wording.....by B.2.1 and B.2.2...... with:

........by B.3.1 and B.3.2...... Accepted


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Reason: wrong reference175 DK Annex B B.1

Last lineE Replace “410.3.5” with “410.3.4”. See 172

176 DK Annex B B.3.3Second

line

E Replace “B.2.1 and B.2.2” with“B.3.1 and B.3.2”.

See 174

177 DE Annex C 1st Note E Replace 410.3.4 with: 410.3.5 Accepted178 DE Annex C C.3.7

Last lineE For correctness replace “ Table 1” with: Table 41A Accepted

179 DK Annex C Note E Replace “410.3.4” with “410.3.5”. See 177180 DK Annex C C.2.3

Secondline

E For improvement of the text amend it as in thefrench text of 413.4.2 in IEC 60364-4-41(2001).

Amend the second line to read: “Contact with earth neither directlynor through exposed conductiveparts or through...”.

Insert ccmma after"directly"

181 UK Annex C C1.3 E Renumber as 1.2 to show relative importance No change

182 NO Annex C Note E The reference to 410.3.4 is wrong. Modify to “410.3.5”. See 177183 NL New

Annex DT Add an informative annex D see annex (doc FELV, SELV and

PELV)Consider for future work

– 37 – 64/1342/RVC

Annex NL

Informative annex D Overview of the requirements for FELV (411.7) and SELV and PELV (414)

FELV SELV PELV

Maximum voltage: upper limit of voltage band I ( 50V ac or 120 V dc) Basic insulation of live partsaccording A1 corresponding theprimary voltage,or barrieres or enclosures inaccordance with A2

If the nominal voltage exceeds 25 V ac or 60 V dc or if theequipment is immersed: Basic insulation of live parts according A1corresponding the primary voltage,or barrieres or enclosures inaccordance with A2

If the nominal voltage does not exceed 25 V ac or 60 V dc basicprotection is generally unnecessary in dry conditions ( for PELVexposed parts to be earthed)Basic protection is not required for voltages not exceeding 12 V acor 30 V dc.

Basic insulation of live partsaccording A1 corresponding theprimary voltage,or barrieres or enclosures inaccordance with A2

Protective separation from live parts of other circuits, except otherSELV and PELV circuit by either:• dubble or reinforced insulation for the highest voltage present,• basic insulation and protective screening for the highest voltage

presentSource shall be at leasttransformer with simpleseparation or compliance withsource for SELV and PELV

The following sources may be used:• safety isolating transformer or equivalent (414.3.1 or 414.3.2)• electrochemical source or another source independent of a

higher voltage circuit (414.3.3),• certain electronic devices (414.3.4),• mobile sources supplied at low voltage (413.3.5)basic insulation between live parts and other SELV or PELVbasic insulation between liveparts and earth

Exposed conductive parts ofequipment shall be connected tothe PE conductor of the source

exposed conductive parts shallnot be earthed 414.44

circuits and exposed conductiveparts may be earthed

Wiring shall comply with 414.4.2Plugs and socket outlets shall be not compatible with plugs and socket outlets of other voltagesystemsPlugs and socket-outlets shallhave a PE contact

Plugs and socket-outlets shall not have a PE contact

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IEC 60364-4-41 64 1342 RVC

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