1、C22.2 No. 244-05(reaffirmed 2015)SwitchboardsUpdate No. 1C22.2 No. 244-05October 2012Note: For information about the Standards Update Service, go to shop.csa.ca or e-mail techsupportcsagroup.org.Title: Switchboards originally published July 2005The following revisions have been formally approved and
2、 are marked by a vertical line in the margin on the attached replacement pages:Revised Cover, Copyright page, Preface, Clauses 2.4.1.1, 3.1, 3.2, 6.2.1.2, 6.2.1.8, 6.2.2.7, 6.3.3.1, 8.1.6.1, 8.1.11.1, 8.1.11.1.1, 8.1.13.4, 8.1.13.5.1, 8.1.15.1, 8.1.16.7, 8.4.8.6, 8.4.8.9, 8.6.9, 8.6.9.1, 8.6.9.3, 8.
3、6.11.18, 8.6.14.5, 8.8.1.2.2.1, 9.2.4.2.7.1, 9.2.4.2.7.2, and 9.2.4.5.1, Tables 4, 12, 13, 16, 25, 29, 30, 31, and G3.1, Figures 17, and Annexes AC and GNew Clauses 3.42A, 6.2.1.15, 6.2.5A, 8.1.1.10, 8.1.5.5, 8.1.6.3, 8.1.7.1.2, 8.1.7.1.3, 8.4.3.10, 8.6.6.5.1, 8.6.11.22, 8.6.14.9, and 8.8.3.2.6.1, a
4、nd Figure 6A Deleted Clause 8.6.9.2 Update your copy by inserting these revised pages.Keep the pages you remove for reference.Association of Standardization and CertificationNMX-J-118/2-ANCE-2012Third EditionCSA GroupCSA C22.2 No. 244-05First EditionUnderwriters Laboratories Inc.UL 891Eleventh Editi
5、onSwitchboardsJuly 26, 2005(Title Page Reprinted: October 31, 2012)ANSI/UL 891-2012Commitment for AmendmentsThis standard is issued jointly by the Association of Standardization and Certification (ANCE), theCanadian Standards Association (operating as CSA Group), and Underwriters Laboratories Inc. (
6、UL).Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSAGroup, or UL at any time. Revisions to this standard will be made only after processing according tothe standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL will issuerevisions t
7、o 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 CSA Group and UL pages.Copyright 2012 ANCERights reserved in favor of ANCE.ISBN 1-5543
8、6-859-6 2005 CSA GroupAll rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.CSA Group Standards are subject to periodic review, and suggestions for their improvement will bereferred to the appropriate committee. To subm
9、it a proposal for change, please send the followinginformation to inquirescsagroup.org and include Proposal for change in the subject line: Standarddesignation (number); relevant clause, table, and/or figure number; wording of the proposed change;and rationale for the change.To purchase CSA Group St
10、andards and related publications, visit CSAs Group Online Store atwww.shopcsa.ca or call toll-free 1-800-463-6727 or 416-747-4044.Copyright 2012 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any w
11、ay. All of ULs Standards and all copyrights, ownerships, and rights regardingthose Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Eleventh Edition including revisions through October31, 2012. The most recent designation of ANSI/UL 891 as
12、 an American National Standard (ANSI)occurred on October 31, 2012. ANSI approval for a standard does not include the Cover Page,Transmittal Pages, Title Page (front and back), or the Preface.Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time.Proposals
13、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.CONTENTSPreface .61 General 81.1 Scope and object .82 General 82.1 Undated references .82.2 Multipl
14、e countries codes .82.3 Products for Canada 82.4 Components 8A3 Definitions 8A4 Units of measurement 135 Electrical characteristics of assemblies .135.1 General 135.2 Rated voltages 135.3 Continuous current rating .145.4 Short-circuit current rating 155.5 Rated peak withstand current (Ipk) (of a cir
15、cuit of an assembly) .155.6 Rated conditional short-circuit current (Icc) (of a circuit of an assembly) 155.7 Rated fused short-circuit current (Icf) (of a circuit of an assembly) .155.8 Rated diversity factor 155.9 Rated frequency 156 Information to be given regarding the assembly .156.1 Nameplates
16、 .156.2 Markings .166.3 Instructions for installation, operation and maintenance 287 Service conditions .307.1 Normal service conditions 307.2 Special service conditions 307.3 Conditions during transport, storage, and erection .308 Design and construction 308.1 Mechanical design .308.2 Enclosure and
17、 degree of protection .458.3 Temperature rise 508.4 Protection against electric shock 508.5 Short-circuit protection and short-circuit withstand strength .588.6 Switching devices and components installed in assemblies 58A8.7 Internal separation of assemblies by barriers or partitions 728.8 Electrica
18、l connections inside an assembly: bars and insulated conductors 748.9 Requirements for electronic equipment supply circuits .888.10 Electromagnetic compatibility 889 Test specifications .889.1 Classification of tests 889.2 Type tests 909.3 Routine tests 10710 Tables 10811 Figures .129OCTOBER 31, 201
19、2 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 3Annex A Standards for ComponentsInformativeAnnex B Standards Referenced in the Trinational Switchboard Standard(Normative)Annex C Markings Required to be Translated and Suggested French TranslationsInformativeAnnex D Example of Series Short-Circuit Cu
20、rrent Rating MarkingInformativeAnnex E Example of Terminal Torque Marking (Informative)Annex F Short-Circuit Test at Reduced Voltage (normative)F1 Voltage .160F2 Current .160Annex G Maximum 100 000 Ampere Short-Circuit Current Rating Without Short-Circuit Test(normative)G1 Scope .167G2 Glossary .167
21、G3 Construction 167G3.1 General .167G3.2 Spacings 180G3.3 Supports .181G4 Performance 181G4.1 General .181G4.2 Tensile 182G4.3 Cantilever 184G5 Marking 184JULY 26, 2005NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 8914Supplement A Use of Components Not UL Listed or Recognized(For U.S. Only)SA1 Scope 186
22、SA2 Conditions of Use 186SA3 Overcurrent Protections .189SA4 Circuit Breaker and Ground Fault Circuit Interrupter 189SA5 Tests and Records By the Manufacturer 190JULY 26, 2005 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 5PrefaceThis is the harmonized ANCE, CSA Group, and UL standard for Switchboar
23、ds. It is the Third edition ofNMX-J-118/2-ANCE, the First edition of CSA C22.2 No. 244, and the Eleventh edition of UL 891. Thisharmonized standard has been jointly revised on October 31, 2012. For this purpose, CSA Group and ULare issuing revision pages dated October 31, 2012, and ANCE is issuing a
24、 new edition dated October 31,2012.This harmonized standard was prepared by the Association of Standardization and Certification (ANCE),CSA Group, Underwriters Laboratories Inc., (UL) and the Switchboards manufacturing industry. Theefforts and support of the CANENA 17D Panelboard and Switchboard Tec
25、hnical HarmonizationCommittee, are gratefully acknowledged. The present Mexican Standard was developed by the CT CDIControl y Distribucion Industrial from the Comite de Normalizacion de la Asociacion de Normalizacion yCertificacion, A.C., CONANCE, with the collaboration of the switchboards manufactu
26、rers and users.This standard is considered suitable for use for conformity assessment within the stated scope of thestandard.This standard was reviewed by the CSA Subcommittee on Switchboards, under the jurisdiction of the CSATechnical Committee on Industrial Products and the CSA Strategic Steering
27、Committee on Requirementsfor Electrical Safety, and has been formally approved by the CSA Technical Committee.This standard will be submitted to the Standards Council of Canada (SCC) for approval as a NationalStandard of Canada.This standard has been approved by the American National Standards Insti
28、tute (ANSI) as an AmericanNational Standard.A UL standard is current only if it incorporates the most recently adopted revisions, all of which areitemized on the transmittal notice that accompanies the latest set of revised requirements.Where reference is made to a specific number of samples to be t
29、ested, the specified number shall beconsidered a minimum quantity.Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remainsthe responsibility of the users of the standard to judge its suitability for their particular purpose.Leve
30、l of harmonizationThis standard uses the IEC format but is not based on, nor is it considered equivalent to, an IEC standard.This standard is published as an equivalent standard for ANCE, CSA Group, and UL. An equivalentstandard is a standard that is substantially the same in technical content, exce
31、pt as follows: Technicalnational differences are allowed for codes and governmental regulations as well as those recognized asbeing in accordance with NAFTA Article 905, for example, because of fundamental climatic, geographical,technological, or infrastructural factors, scientific justification, or
32、 the level of protection that the countryconsiders appropriate. Presentation is word for word except for editorial changes.OCTOBER 31, 2012NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 8916Reasons for differences from IECThe Technical Harmonization Committee determined the safe use of enclosed and dead-
33、front switches isdependent on the design and performance of the products in relation to the North American ElectricalCodes with which they are intended to be installed.InterpretationsThe interpretation by the standards development organization of an identical or equivalent standard isbased on the li
34、teral 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 beenidentified, a revision is to be proposed as soon as possible to each of the standards developmentorganiza
35、tions 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 cover page.CSA Group Effective DateThe effective date for CSA Group will be announced through CSA Informs
36、or a CSA Group certificationnotice.UL Effective DateAs of October 31, 2012 all products Listed or Recognized by UL must comply with the requirements inthis standard except for clauses in the following list, which are effective October 31, 2014.Clauses 8.1.5.5, 8.6.11.22, and 8.6.14.9.Between October
37、 31, 2012 and October 31, 2014, new product submittals to UL may be evaluated underall requirements in this standard or, if requested in writing, evaluated under presently effectiverequirements only.A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSIa
38、pproved standard.OCTOBER 31, 2012 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 7Switchboards1 General1.1 Scope and object1.1.1 This Standard applies to switchboards nominally rated at 600 V or less and intended for use inaccordance with the Canadian Electrical Code, Part 1 (CE Code, Part 1), the Na
39、tional Electrical Code(NEC), ANSI/NFPA 70, and the Mexican Standard for Electrical Installations (Utility), NOM-001-SEDE.1.1.2 In this standard the term switchboard is intended to refer to a dead-front switchboard.1.1.3 These requirements do not cover the following switchboard types: preset and dimm
40、er control(theater), live front, railway control or electrification; or constructions intended only for receiving motorcontrol center units.1.1.4 These requirements cover switchboards for use on circuits having available rms symmetricalshort-circuit currents of not more than 200 000 A.2 General2.1 U
41、ndated referencesFor undated references to standards, such reference shall be considered to refer to the latest edition andall revisions to that edition up to the time when this standard was approved. For dated references tostandards, such reference shall be considered to refer to the dated edition
42、and all revisions published tothat edition up to the time the standard was approved. See Annex B.2.2 Multiple countries codesWhen compliance with multiple countries codes or Standards is required, but the product is not intendedfor use in all three countries, the product need only comply with the co
43、des or Standards for the countryor countries in which it is intended to be used.2.3 Products for CanadaFor products intended for use in Canada general requirements are given in reference item 15 of Annex B.JULY 26, 2005NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 89182.4 Components2.4.1 A component of
44、a product covered by this standard shall comply with the requirements for thatcomponent. See Annex A for a list of Standards covering components generally used in the productscovered by this Standard. A component shall comply with the Underwriters Laboratories Inc. Standards,the ANCE Standards, and
45、the Canadian Standards Association Standards for the component. When aproduct is not intended for use in all three countries, a component need only comply with the componentStandards for the country or countries in which it is intended to be used.2.4.1.1 A component need not comply if it is:a) used
46、in a Class 2 circuit andb) treated as an arcing part as covered in 8.2.1.3.1.1 and 8.8.1.8.5.2.4.1.2 A component need not comply with a specific requirement that:a) involves a feature or characteristic not needed in the application of the component in theproduct covered by this standard orb) is supe
47、rseded by a requirement in this standard.2.4.2 A component shall be used in accordance with its recognized rating established for the intendedconditions of use.2.4.3 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such compone
48、nts are intended for use only under limited conditions, such ascertain temperatures not exceeding specified limits, and shall be used only under those specific conditionsfor which they have been recognized.3 DefinitionsFor the purposes of this standard, the following definitions apply:3.1 Accessible
49、, front : an enclosure in which incoming and outgoing field termination points areaccessible from the front. Other connections shall be permitted to be rear or side accessible. Ifnecessary, a limited number of barriers or covers shall be permitted to be removed to achieve thisaccessibility.3.2 Accessible, rear : an enclosure in which all incoming and outgoing field termination points areaccessible from the rear. Other connections shall be permitted to be front or side accessible.
