1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 891 SwitchboardsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
2、ISTRIBUTION WITHOUT PERMISSION FROM UL Switchboards, UL 891 Eleventh Edition, Dated July 26, 2005 Summary of Topics These revisions for ANSI/UL 891 are being issued to incorporate the following changes in requirements: Revision based on panelboard changes in the 2008 NEC Update wire bending space fo
3、r compact stranded AA-8000 aluminum to match UL 67 and the National Electrical Code NFPA 70 Clarify intent of front and rear accessible denitions Update wire bending requirements to match the exception in UL 1558 for LV Switchgear Add required Latch Pull Test 9.2.9 to Table 12 Enclosure Type test re
4、quirements 80% marking requirement location category identication Clarify requirements for the service equipment intended for use with multiple sources Revision to switch handle requirements to limit requirement to those switches which operate vertically between the on and off position Mounting orie
5、ntation of circuit breakers or switches Accessibility requirements for de-energizing branch circuits Inclusion of allowance for alternate gap spacing at anged cover constructions Inclusion of meter socket maximum peak let-through current criteria to pass/fail criteria Bracing of load conductors duri
6、ng short-circuit tests Reinsert requirements necessary in determining the short-circuit current rating of a switchboard Requirements for the identication of grounding and bonding conductors Requirements for the securement of meter socket covers Reinsert requirement for marking on switchboard interio
7、rs. Update requirements for installation of surge-protective devices at services Clarify requirements in maximum temperature rise table Multiple corrections Clarify ground-fault protection requirements to address use of rating plugs OCTOBER 31, 2012 UL 891 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED F
8、OR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Correction to 600 volt thermoplastic appliance wiring material insulation, Table 29 Correction to rating and sizes of single bus bars 800 amperes maximum, Table 25 Addition of lighting xtures to Table 16 Correct system references for
9、 audio or visual only ground fault protection Grounding transformers for high impedance grounded systems Equipment door opening 90 degrees from the closed position Use of weather-resistant type receptacles Text that has been changed in any manner or impacted by ULs electronic publishing system is ma
10、rked with a vertical line in the margin. The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated July 9, 2010 and March 30, 2012. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form b
11、y any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no
12、 event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised
13、of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss
14、, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraph
15、s, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS noti
16、ce. The following table lists the future effective dates with the corresponding reference. OCTOBER 31, 2012 UL 891 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference October 31, 2014 Clauses 8.1.5.5, 8.6.11.22
17、, and 8.6.14.9. OCTOBER 31, 2012 UL 891 tr3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 31, 2012 UL 891 tr4 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FRO
18、M UL Association of Standardization and Certication NMX-J-118/2-ANCE-2012 Third Edition CSA Group CSA C22.2 No. 244-05 First Edition Underwriters Laboratories Inc. UL 891 Eleventh Edition Switchboards July 26, 2005 (Title Page Reprinted: October 31, 2012) ANSI/UL 891-2012UL COPYRIGHTED MATERIAL NOT
19、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (operating as CSA Group), and Underwriters Laboratories Inc. (UL).
20、 Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions t
21、o this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and UL pages. Copyright 2012 ANCE Rights reserved in favor of ANCE. ISBN 1
22、-55436-859-6 2005 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. CSA Group Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee
23、. To submit a proposal for change, please send the following information to inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the proposed change; and rationale for the change. To purchase C
24、SA Group Standards and related publications, visit CSAs Group Online Store at www.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 Standard should be a
25、ltered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. This ANSI/UL Standard for Safety consists of the Eleventh Edition including revisions through October 31, 2012. The most recent designation
26、 of ANSI/UL 891 as 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 a
27、t any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
28、IBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .6 1 General 8 1.1 Scope and object .8 2 General 8 2.1 Undated references .8 2.2 Multiple countries codes .8 2.3 Products for Canada 8 2.4 Components 8A 3 Denitions 8A 4 Units of measurement 13 5 Electrical characteristics of assemblies .13 5.1 Gen
29、eral 13 5.2 Rated voltages 13 5.3 Continuous current rating .14 5.4 Short-circuit current rating 15 5.5 Rated peak withstand current (I pk ) (of a circuit of an assembly) .15 5.6 Rated conditional short-circuit current (I cc ) (of a circuit of an assembly) 15 5.7 Rated fused short-circuit current (I
30、 cf ) (of a circuit of an assembly) .15 5.8 Rated diversity factor 15 5.9 Rated frequency 15 6 Information to be given regarding the assembly .15 6.1 Nameplates .15 6.2 Markings .16 6.3 Instructions for installation, operation and maintenance 28 7 Service conditions .30 7.1 Normal service conditions
31、 30 7.2 Special service conditions 30 7.3 Conditions during transport, storage, and erection .30 8 Design and construction 30 8.1 Mechanical design .30 8.2 Enclosure and degree of protection .45 8.3 Temperature rise 50 8.4 Protection against electric shock 50 8.5 Short-circuit protection and short-c
32、ircuit withstand strength .58 8.6 Switching devices and components installed in assemblies 58A 8.7 Internal separation of assemblies by barriers or partitions 72 8.8 Electrical connections inside an assembly: bars and insulated conductors 74 8.9 Requirements for electronic equipment supply circuits
33、.88 8.10 Electromagnetic compatibility 88 9 Test specications .88 9.1 Classication of tests 88 9.2 Type tests 90 9.3 Routine tests 107 10 Tables 108 11 Figures .129 OCTOBER 31, 2012 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIST
34、RIBUTION WITHOUT PERMISSION FROM UL Annex A Standards for Components Informative Annex B Standards Referenced in the Trinational Switchboard Standard (Normative) Annex C Markings Required to be Translated and Suggested French Translations Informative Annex D Example of Series Short-Circuit Current R
35、ating Marking Informative Annex E Example of Terminal Torque Marking (Informative) Annex F Short-Circuit Test at Reduced Voltage (normative) F1 Voltage .160 F2 Current .160 Annex G Maximum 100 000 Ampere Short-Circuit Current Rating Without Short-Circuit Test (normative) G1 Scope .167 G2 Glossary .1
36、67 G3 Construction 167 G3.1 General .167 G3.2 Spacings 180 G3.3 Supports .181 G4 Performance 181 G4.1 General .181 G4.2 Tensile 182 G4.3 Cantilever 184 G5 Marking 184 JULY 26, 2005 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
37、IBUTION WITHOUT PERMISSION FROM UL Supplement A Use of Components Not UL Listed or Recognized (For U.S. Only) SA1 Scope 186 SA2 Conditions of Use 186 SA3 Overcurrent Protections .189 SA4 Circuit Breaker and Ground Fault Circuit Interrupter 189 SA5 Tests and Records By the Manufacturer 190 JULY 26, 2
38、005 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA Group, and UL standard for Switchboards. It is the Third edition of NMX-J-118/2-ANCE, the First editi
39、on of CSA C22.2 No. 244, and the Eleventh edition of UL 891. This harmonized standard has been jointly revised on October 31, 2012. For this purpose, CSA Group and UL are issuing revision pages dated October 31, 2012, and ANCE is issuing a new edition dated October 31, 2012. This harmonized standard
40、 was prepared by the Association of Standardization and Certication (ANCE), CSA Group, Underwriters Laboratories Inc., (UL) and the Switchboards manufacturing industry. The efforts and support of the CANENA 17D Panelboard and Switchboard Technical Harmonization Committee, are gratefully acknowledged
41、. The present Mexican Standard was developed by the CT CDI Control y Distribucion Industrial from the Comite de Normalizacion de la Asociacion de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the switchboards manufacturers and users. This standard is considered suitable for u
42、se for conformity assessment within the stated scope of the standard. This standard was reviewed by the CSA Subcommittee on Switchboards, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and h
43、as been formally approved by the CSA Technical Committee. This standard will be submitted to the Standards Council of Canada (SCC) for approval as a National Standard of Canada. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. A UL
44、 standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. Where reference is made to a specic number of samples to be tested, the specied number shall be considered a
45、minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard uses the IEC
46、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 equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical national differenc
47、es are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientic justication, or the level of protection that the country co
48、nsiders appropriate. Presentation is word for word except for editorial changes. OCTOBER 31, 2012 NMX-J-118/2-ANCE-2006 C22.2 NO. 244-05 UL 891 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Reasons for differences from IEC The Technical H
49、armonization Committee determined the safe use of enclosed and dead-front switches is dependent on the design and performance of the products in relation to the North American Electrical Codes with which they are intended to be installed. Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in
