UL 60947-7-2 (ND)-2017 National Differences For Low-Voltage Switchgear and Controlgear C Part 7-2 Ancillary Equipment C Protective Conductor Terminal Blocks for Copper Conductors (.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForLow-Voltage Switchgear and Controlgear Part 7-2: Ancillary Equipment Protective ConductorTerminal Blocks for Copper ConductorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FU

2、RTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForLow-Voltage Switchgear and Controlgear Part 7-2: Ancillary Equipment Protective ConductorTerminal Blocks for Copper ConductorsFourth EditionEdition Date: January 27, 2017This revision of ANSI/UL 60947-7-2 is to revis

3、e the National Differences to include Canada. Thisstandard is harmonized for Canada, Mexico and the United States and co-published by all threestandards development organizations (CSA Group, ANCE and UL).This document provides a single listing of the National Differences included in the UL adoption

4、ofthe corresponding IEC standard.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this standards document as

5、 is without warranty of any kind, either expressed or implied,including but not limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savin

6、gs, loss of data, or any other damages arising out of the use of or theinability to use this standards document, even if UL or an authorized UL representative has been advisedof the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this standard

7、s document, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or devi

8、ation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright 2017 Underwriters Laboratories Inc.JANUARY 27, 2017NATIONAL DIFFERENCES FOR2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceTh

9、is document provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in this document. The

10、 standard may not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise safety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These are deviations for

11、 IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based on the component standards and will not be deleted until a particularcomponent standard is harmonized with the IEC comp

12、onent standard.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words is used to explain

13、how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table, figure,or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete - A deletion entails

14、 complete deletion of an entire numbered clause, subclause, table,figure, or annex without any replacement text.Modification / Modify - A modification is an altering of the existing base IEC text such as the addition,replacement or deletion of certain words or the replacement of an entire clause, su

15、bclause, table, figure,or annex of the base IEC text.JANUARY 27, 2017 NATIONAL DIFFERENCES FOR 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1.1DV.1 D2 Modification of Clause 1.1:Replace “0,2 mm2and 120 mm2(AWG 24 and 25

16、0 kcmil)” with “0,1 mm2and 120 mm2(AWG 30 and 250 kcmil)”.1.1DV.2 D2 Modification by adding the following:This standard applies to insulation displacement terminals.1.1DV.3 DR Modification by adding the following:Terminal blocks with PEN function are not permitted.1.1DV.4 D2 Modification by adding t

17、he following:This standard also applies to terminal blocks that have insulation piercing or displacementclamping units.1.1DV.5 D2 Modification by adding the following:This standard specifies requirements for protective conductor terminal blocks with PEfunction up to 120 mm2(250 kcmil) and for protec

18、tive conductor terminal blocks with PENfunction equal to and above 10 mm2(AWG 8) with screw-type or screwless-type clampingunits, primarily intended for industrial applications, in accordance with Annex DVB of item1 in Annex DVA, National Electrical Code, NFPA 70 (for use in the USA), CSA C22.1-15Ca

19、nadian Electrical Code, Part I (for use in Canada), or NOM-001-SEDE, ElectricalInstallations (Utility) for use in Mexico.1.2DV D1 Modification by adding the followingSee Annex DVA for Canada, Mexico, and USA Standard References.2.2DV D2 Modification by adding the following:It is mechanically and ele

20、ctrically attached to its support, path 2-2 in Figure 5. In somecases it will have path 1-1, and in other cases it will not.2.3DV DR Delete Clause 2.3:This definition does not apply.3DV.1 D2 Modification by adding the following dashed item to the list:application: commercial and industrial, or servi

21、ceJANUARY 27, 2017NATIONAL DIFFERENCES FOR4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3DV.2 DR Modification by replacing the seventh dashed item in the list with thefollowing: PE functions.3DV.3 D3 Modification by adding the following:In

22、Canada, the general requirements applicable to this Standard are provided inCAN/CSA-C22.2 No. 0.4.3.2DV D2 Modification by adding the following:A protective conductor terminal block, classified for use as an unprotected circuit, shall besubjected to the Short-time withstand current test for Service

23、Applications.NOTE 1DV: In Canada, a “protective conductor terminal block” is a “bonding conductor terminal block”. They aredeemed to be the same.4.3.5DV D2 Modification by replacing 4.3.5 with the following:Subclause 4.3.5 of Annex DVA, item 1 applies.Table 1DV D2 Delete Table 1:This table does not

24、apply.5.1DV D2 Add the following to Clause 5.1:cDV) A protective conductor terminal block, not complying with 7.1.4, shall bemarked with the symbol in Figure 6DV or with ”G”, “GR”, “GND”, “Ground”,“Grounding”, or equivalent marking.Figure 6DV D2 Addition of the following figure:This is generated tex

25、t for figtxt.JANUARY 27, 2017 NATIONAL DIFFERENCES FOR 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.2DV.1 DE Deletion of item a).5.2DV.2 DE Modification by replacing item c) with the following:c) the rated connecting capacity;5.2DV.3 D2

26、Modification by replacing the Note with the following:NOTE: No marking indicates suitability for use in PE function.5.2DV.4 D2 Modification by adding the following:The information in Subclause 5.2 of Annex DVA, item 1 shall be stated by themanufacturer, except for rated operational voltage, rated cu

27、rrent, rated insulation voltage,and rated impulse withstand voltage.7.1.1DV D2 Modification by replacing the fourth paragraph with the following:Compliance is checked by inspection, by the test of 8.3.4.1, and by the tests of 8.3.4.2 and8.3.4.3 of Annex DVA, item 1.7.1.2DV D2 Modification by adding

28、the following:The protective earthing connection of a protective conductor terminal block to its supportshall be made independently or simultaneously with its fixation to the support.Figure 6DVGrounding symbolJANUARY 27, 2017NATIONAL DIFFERENCES FOR6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

29、 REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.3DV D2 Modification by adding the following:Subclause 7.1.3 of Annex DVA, item 1 applies.7.1.4DV D2 Addition of the following NOTE to 7.1.4:Note 1DV: A green-colored screw head alone does not meet the intent of this requirement.7.2.3DV DE Mo

30、dification of the heading for 7.2.3 for commercial and industrial use asfollows:Rated short-time withstand current (Commercial and industrial)7.2.3ADV D2 Addition of Clause 7.2.3ADV.1 and Table 7.2.3DV:7.2.3ADV.1 Rated short-time withstand current (Service)A protective conductor terminal block, inte

31、nded for use in service applications, shall becapable of withstanding a single application of the current specified in Subclause 7.2.3, forthe time specified in Table 7.2.3DV, without damage to the terminal block or its support. Atthe conclusion of the test, continuity shall exist when tested as des

32、cribed in 8.4.6DV.4.1.2.Table 7.2.3DVRated short-time withstand current test duration (Service)Conductor size AWG/kcmil mm2Time, seconds14 2,1 412 3,3 410 5,3 48 8,4 46 13,3 64 21,2 63 26,7 62 33,6 61 42,4 61/0 and larger 53,5 9Table 8.2DV D2 Addition of the following table:JANUARY 27, 2017 NATIONAL

33、 DIFFERENCES FOR 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 8.2DVTest sequenceSequence Number Quantity Test Referenced Clause1 2 of 5 Verification of Mechanical Characteristics 8.32 2 of 5 Mechanical properties of clamping units 8.

34、3.3.1Verification of voltage dropa8.4.4Mechanical properties of attachment to support 8.3.3.1Verification of voltage dropa8.4.43 2 Verification of clearances and creepagedistances8.4.24 3 of 5 Dielectric tests 8.4.3Dielectric tests for insulation displacementterminals8.4.3DV5 5 Temperature rise sequ

35、enceVerification of the voltage dropa8.4.4Temperature rise test 8.4.5Verification of the voltage dropa8.4.46 1 Short time withstand current sequenceVerification of the voltage drop 8.4.4Short time withstand current test (Commercialand Industrial Application)8.4.6DV.1Verification of the voltage drop

36、8.4.46A 1 Short time current sequence (ServiceApplications)8.4.6DV.4.1Current Test 8.4.6DV.4.1.1Continuity Test 8.4.6DV.4.1.27 5 Aging test sequenceVerification of the voltage dropa8.4.4Aging test for protective conductor terminalblocks with screwless type clamping units8.4.7Verification of the volt

37、age dropa8.4.47A 2 Aging test for protective conductor terminalblocks with insulation displacement typeclamping units8.4.7DV8 1 of 3 Verification of thermal characteristicsa8.5aNot required in Canada and the US.8.4.3DV D2 Modification by adding the following:Insulation displacement terminals shall b

38、e conditioned according to Subclause 8.4.7DV.2.1of Annex DVA, item 1, prior to the dielectric test.8.4.6DV.1 DE Modification of the heading for 8.4.6 as follows:Short-time withstand current test (Commercial and industrial application)8.4.6DV.2 D2 Modification by adding the following:The tests shall

39、be repeated for each alternate support construction, support material, orboth.JANUARY 27, 2017NATIONAL DIFFERENCES FOR8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.4.6DV.3 D2 Modification by adding the following:A copper conductor of the

40、largest size for which the terminal block is rated, not less than0.6 m long, shall be installed.8.4.6DV.4 D2 Add the following subclauses:8.4.6DV.4.1 Short time current sequence (Service applications)8.4.6DV.4.1.1 Current testA copper conductor of the rated cross-section, not less than 0.6 m long, s

41、hall be installed.The tightening torque shall be in accordance with the manufacturers instructions or, in theabsence of such instructions, in accordance with table 4 of Annex DVA, item 2. The testcurrent shall be passed through the mounting support and the conductor in series,through path 2-2 in acc

42、ordance with Figure 5.8.4.6DV.4.1.2 Continuity testAfter the current test described in 8.4.6DV.4.1.1, continuity shall exist on the test sampleassembly when measured between a point on the mounting support 6.4 mm from theconnection and a similar point on the conductor. An indicating device such as a

43、nohmmeter, battery-and-buzzer combination, or similar device shall be used to determine ifcontinuity exists.8.4.7DV D2 Modification by adding the following:Requirements for the Ageing Test for Insulation displacement terminal blocks are coveredby the Current Cycling tests in Annex DVA, item 1.8.7DV

44、D2 Addition of the following subclause:8.7DV.1 Thermoplastic insulation stress relief testIn Mexico and the United States, Subclause 8.7DV of Annex DVA, item 1, applies.In Canada, Subclause 8.8DV of Annex DVA, item 1 applies.DVA DC Addition: Add Annex DVA to the Part 2:JANUARY 27, 2017 NATIONAL DIFF

45、ERENCES FOR 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULItem Canada Mexico United States1 CAN/CSA- C22.2 No.60947-7-1NMX-J-538/7-1-ANCE ANSI/UL 60947-7-12 CAN/CSA- C22.2 No.60947-1NMX-J-515-ANCE ANSI/UL 60947-13 CSA C22.1 NOM-001-SEDE NFPA 704 CAN/CSA-C22.2 No. 0 JANUARY 27, 2017NATIONAL DIFFERENCES FOR10