UL 60947-7-2-2011 UL Standard for Safety Low-Voltage Switchgear and Controlgear - Part 7-2 Ancillary Equipment - Protective Conductor Terminal Blocks for Copper Conductors (Third E.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 60947-7-2Low-Voltage Switchgear andControlgear Part 7-2:Ancillary Equipment Protective Conductor TerminalBlocks for Copper ConductorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC

2、TION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULLow-Voltage Switchgear and Controlgear Part 7-2: Ancillary Equipment Protective Conductor TerminalBlocks for Copper Conductors, UL 60947-7-2Third Edi

3、tion, Dated May 6, 2011Summary of TopicsThis revision of ANSI/UL 60947-7-2 is to add the ANSI approval date to the title page. Thisstandard is a bi-national IEC-based standard that is harmonized for Mexico and the UnitedStates, and co-published by both standards development organizations (ANCE and U

4、L).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 Standard as is without warranty of any kind, either

5、 expressed or implied, including butnot 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 savings, loss of data, or any other damages a

6、rising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the

7、 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 deviation introduced while purchaser is storing an electronicSta

8、ndard on the purchasers computer system.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the preface. The priortext for requirements that have been revised a

9、nd that have a future effective date are located after theStandard, and are preceded by a SUPERSEDED REQUIREMENTS notice.OCTOBER 14, 2011 UL 60947-7-2 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 14, 2011 UL 60947-7-2tr2No Text o

10、n This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAssociation of Standardization and CertificationNMX-J-538/7-2-ANCEFirst EditionUnderwriters Laboratories Inc.UL 60947-7-2Third EditionLow-Voltage Switchgear and Controlgear Part 7-2: A

11、ncillaryEquipment Protective Conductor Terminal Blocks for CopperConductorsMay 6, 2011(Title Page Reprinted: October 14, 2011)ANSI/UL 60947-7-2-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCommitment for AmendmentsThis standard is issue

12、d jointly by the Association of Standardization and Certification (ANCE) andUnderwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standardmay be submitted to ANCE or UL at anytime. Revisions to this standard will be made only afterprocessing according to the sta

13、ndards development procedures of ANCE and UL. UL will issuerevisions to this standard by means of a new edition or revised or additional pages bearing their dateof issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the samedate of issue as the UL pages.Copyrig

14、ht 2011 ANCERights reserved in favor of ANCE.Copyright 2011 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose St

15、andards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Third Edition including revisions through May 6, 2011.The most recent designation of ANSI/UL 60947-7-2 as an American National Standard (ANSI) occurredon May 6, 2011. ANSI approval for a stand

16、ard does not include the Cover Page, Transmittal Pages,Title Page (front and back), or the Preface. The National Difference Page and IEC Foreword are alsoexcluded from the ANSI approval of IEC-based standards.Comments or proposals for revisions on any part of the Standard may be submitted to UL at a

17、ny time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at http:/.To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WI

18、THOUT PERMISSION FROM ULCONTENTSPreface .4NATIONAL DIFFERENCES .6FOREWORD 71 General 91.1 Scope .91.2 Normative references .102 Definitions 103 Classification 114 Characteristics .114.1 Summary of characteristics .114.2 Type of protective conductor terminal block .124.3 Rated and limiting values .12

19、5 Product information 135.1 Marking 135.2 Additional information 146 Normal service, mounting and transport conditions .157 Constructional and performance requirements .157.1 Constructional and performance requirements 157.2 Performance requirements 177.3 Electromagnetic compatibility (EMC) .188 Tes

20、ts .188.1 Kinds of test 188.2 General 198.3 Verification of mechanical characteristics .208.4 Verification of electrical characteristics .218.5 Verification of thermal characteristics 298.6 Verification of EMC characteristics .29Annex A (normative) Maximum short-time withstand currents allocated to

21、the rail profile andthermal rated current of a PEN busbarAnnex B (normative) Tightening torques for the verification of the mechanical strength ofscrew-type clamping unitsAnnex C (normative) Standards referencesMAY 6, 2011 NMX-J-538/7-2-ANCE UL 60947-7-2 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F

22、URTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis is the common ANCE and UL standard for Low-Voltage Switchgear and Controlgear Part 7-2:Ancillary Equipment Protective Conductor Terminal Blocks for Copper Conductors. It is the first editionof NMX-J-538/7-2-ANCE, and the third

23、edition of UL 60947-7-2. This edition of UL 60947-7-2 supersedesthe previous edition published in 2004.This standard is based on IEC Publication 60947-7-2: Edition 2 (2002), Low-Voltage Switchgear andControlgear Part 7-2: Ancillary Equipment - Protective Conductor Terminal Blocks for CopperConductor

24、s, as revised by corrigendum (March 2003). IEC publication 60947-7-2 is copyrighted by theIEC.This harmonized standard was prepared by the Association of Standardization and Certification (ANCE),and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical HarmonizationCommittee

25、for Industrial Control Equipment, of the Council on the Harmonization of ElectrotechnicalStandards of the Nations of the Americas (CANENA), are gratefully acknowledged.This Standard is considered suitable for use for conformity assessment within the stated scope of theStandard.The Mexican Standard w

26、as developed by the CT PIE-A from the Comite de Normalizacion de laAsociacion de Normalizacion y Certificacion, A.C., CONANCE, with the collaboration of the manufacturersand users.This standard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.Wher

27、e reference is made to a specific number of samples to be tested, the specified number isconsidered a minimum quantity.Note: Although the intended primary application of this standard is stated in its scope, it is important to note thatit remains the responsibility of the users of the standard to ju

28、dge its suitability for their particular purpose.Level of harmonizationThis standard adopts the IEC text with national differences.This standard is published as an equivalent standard for ANCE and UL.An equivalent standard is a standard that is substantially the same in technical content, except as

29、follows:Technical national differences are allowed for codes and governmental regulations as well as thoserecognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic,geographical, technological, or infrastructural factors, scientific justification, or the l

30、evel of protection thatthe country considers appropriate. Presentation is word for word except for editorial changes.All national differences from the IEC text are included in the (ANCE and/or UL) versions of the standard.While the technical content is the same in each organizations version, the for

31、mat and presentation maydiffer.MAY 6, 2011NMX-J-538/7-2-ANCE UL 60947-7-24UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULReasons for differences from IECThis standard adopts the IEC text with national differences. Throughout the standard, nat

32、ional differenceshave been identified for the countries to which they apply. These differences are necessary in order tomaintain compliance with existing nationally based codes and regulations, or to take into account essentialsafety practices or market based preferences.InterpretationsThe interpret

33、ation by the standards development organization of an identical or equivalent standard isbased on the literal text to determine compliance with the standard in accordance with the proceduralrules of the standards development organization. If more than one interpretation of the literal text has beeni

34、dentified, a revision is to be proposed as soon as possible to each of the standards developmentorganizations to more accurately reflect the intent.ANCE effective dateThe effective date for ANCE will be announced through the Diario Oficial de la Federacin (OfficialGazette) and is indicated on the co

35、ver page.UL effective dateAs of May 6, 2011 all products Listed or Recognized by UL must comply with the requirements in thisstandard.A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSIapproved standard.IEC CopyrightFor ANCE, the text, figures, and ta

36、bles of International Electrotechnical Commission Publication60947-7-2, Low-Voltage Switchgear and Controlgear - Part 7-2: Ancillary Equipment - ProtectiveConductor Terminal Blocks for Copper Conductors, are used in this standard according to the guidelinesprovided in the ISO/IEC/POCOSA.For UL, the

37、text, figures and tables of IEC publication 60947-7-2, Low-Voltage Switchgear andControlgear Part 7-2: Ancillary Equipment Protective Conductor Terminal Blocks for CopperConductors copyright 2002 are used in this Standard with the consent of the IEC and the AmericanNational Standards Institute (ANSI

38、). The IEC copyrighted material has been reproduced with permissionfrom ANSI. ANSI should be contacted regarding the reproduction of any portion of the IEC material. TheIEC Foreword and Introduction are not a part of the requirements of this Standard but are included forinformation purposes only. Co

39、pies of IEC Publication 60947-7-2 may be purchased from ANSI, 25 West43rd Street, 4th Floor, New York, New York, 10036, (212) 642-4900.MAY 6, 2011 NMX-J-538/7-2-ANCE UL 60947-7-2 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNATIONAL DIFFER

40、ENCESGENERALNational Differences from the text of International Electrotechnical Commission (IEC) Publication60947-7-2, Low-Voltage Switchgear and Controlgear Part 7-2: Ancillary Equipment ProtectiveConductor Terminal Blocks for Copper Conductors, second edition (2002), are indicated by notations(di

41、fferences) and are presented in bold text.There are five types of National Differences as noted below. The difference type is noted on the first lineof the National Difference in the standard. The standard may not include all types of these NationalDifferences.DR These are National Differences based

42、 on the national regulatory requirements.D1 These are National Differences which are based on basic safety principles and requirements,elimination of which would compromise safety for consumers and users of products.D2 These are national differences from IEC requirements based on existing safety pra

43、ctices. Theserequirements reflect national safety practices, where empirical substantiation (for the IEC or nationalrequirement) is not available or the text has not been included in the IEC standard.DC These are National Differences based on the component standards and will not be deleted untila pa

44、rticular component standard is harmonized with the IEC component standard.DE These are National Differences based on editorial comments or corrections.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words is utilized to instruct

45、how the text of the national difference is to be applied to the baseIEC text: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.Replacement / Replace A replacement en

46、tails replacement of an entire clause, subclause, paragraph,table, figure, or annex with a new clause, subclause, paragraph, table, figure, or annex.Modification / Modify - A modification is an altering of the existing base IEC text such as the addition,replacement or deletion of certain words or th

47、e replacement of an entire clause, subclause, table, figure,or annex of the base IEC text.Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause, table,figure, or annex without any replacement text.MAY 6, 2011NMX-J-538/7-2-ANCE UL 60947-7-26UL COPYRIGHTED MA

48、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTERNATIONAL ELECTROTECHNICAL COMMISSIONLOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-2: Ancillary equipment Protectiveconductor terminal blocks for copper conductorsFOREWORD1) The IEC (International Electrotech

49、nical Commission) is a worldwide organization for standardization comprising all nationalelectrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on allquestions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IECpublishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee i