1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 857 BuswaysUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRI
2、BUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Busways, UL 857 Thirteenth Edition, Dated March 25, 2009 Summary of Topics This revision to UL 857 includes the following changes in requirements: Replacement of References to “Lighting Fixtures“ in Clauses 2.3.4.4.1 and 7.1.1.22 with “Lum
3、inaires“ Addition of Marking Requirements for Fittings Incorporating Luminaires in Clause 5.2.4.1 Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The new and revised requirements are substantially in accordance wi
4、th Proposal(s) on this subject dated July 30, 2010 and January 21, 2011. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of
5、 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 event will UL be liable for any special, incidental, consequential, indirect or similar damages, inc
6、luding 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 of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pri
7、ce 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, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from
8、 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 paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as in
9、dicated 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 notice. The following table lists the future effective dates with the corresponding reference. DECEMBER 9
10、, 2011 UL 857 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference December 9, 2013 Paragraphs 5.2.3.1 and 5.2.4.1 DECEMBER 9, 2011 UL 857 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DI
11、STRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-148-ANCE-2009 Third Edition Canadian Standards Association CSA C22.2 No. 27-09 Sixth Edition Underwriters Laboratories Inc. UL 857 Thirteenth Edition Busways March 25, 2009 (Title Page Reprinted: December 9, 2
12、011) ANSI/UL 857-2011UL COPYRIGHTED MATERIAL NOT 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 (CSA), and Underw
13、riters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA, or UL at anytime. Revisions to this standard will be made only after processing according to the standards development procedures of ANCE, CSA, and UL. CSA and UL will issue
14、revisions to 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 and UL pages. Copyright 2011 ANCE Rights reserved in favor of ANCE. I
15、SBN 978-1-55436-530-2 2009 Canadian Standards Association All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. CSA Standards are subject to periodic review, and suggestions for their improvement will be referred to t
16、he appropriate committee. To submit a proposal for change to CSA Standards, please send the following information to inquirescsa.ca 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 rati
17、onale for the change. To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2011 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of
18、 a Standard should be altered 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 Thirteenth Edition including revisions through December 9, 2011. Th
19、e most recent designation of ANSI/UL 857 as an American National Standard (ANSI) occurred on December 9, 2011. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The National Difference Page and IEC Foreword are also excluded
20、 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 any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standard
21、s, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503. The Department of Defense (DoD) has adopted UL 857 on April 20, 1993. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
22、ON OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .5 1 Scope .7 1.1 Scope and object .7 1.2 Reference publications 7 1.3 Components .8 1.4 Fittings 8 1.5 Short-run busway .8 1.6 Insulating materials .9 2 Denitions 9 2.1 General .9 2.2 Constructional units of assemblies 9 2.3 External de
23、sign of assemblies 9 2.4 Structural parts of assemblies .11 2.5 Conditions of installation of assemblies 11 2.6 Protective measures with regard to electric shock .11 2.7 Gangways within an assembly 11 2.8 Electronic functions 11 2.9 Insulation co-ordination .11 2.10 Short-circuit currents 11 3 Class
24、ication of assemblies .11 4 Electrical characteristics of assemblies .11 4.1 General 11 4.2 Rated voltages 12 4.3 Rated current (of a circuit of an assembly) .12 4.4 Rated short-time withstand current (/ cw ) (of a circuit of an assembly) 12 4.5 Rated peak withstand current (/ pk ) (of a circuit of
25、an assembly) .12 4.6 Rated conditional short-circuit current (/ cc ) (of a circuit of an assembly) 12 4.7 Rated fused short-circuit current (/ cf ) (of a circuit of an assembly) .13 4.8 Rated diversity factor 13 4.9 Rated frequency 13 5 Information to be given regarding the assembly .13 5.1 General
26、13 5.2 Nameplates .14 5.3 Markings .21 5.4 Instructions for installation, operation, and maintenance 21 6 Service conditions .21 6.1 Normal service conditions 21 6.2 Special service conditions 22 6.3 Conditions during transport, storage, and erection .22 7 Design and construction 22 7.1 Mechanical d
27、esign .22 7.2 Enclosure and degree of protection 37 7.3 Temperature rise .37 7.4 Protection against electric shock 38 7.5 Short-circuit protection and short-circuit withstand strength .44 7.6 Switching devices and components installed in assemblies .46 7.7 Internal separation of assemblies by barrie
28、rs or partitions 46 7.8 Electrical connections inside an assembly: bars and insulated conductors 46 7.9 Requirements for electronic equipment supply circuits .55 MARCH 25, 2009 NMX-J-148-ANCE-2009 CSA C22.2 NO. 27-09 UL 857 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU
29、TION WITHOUT PERMISSION FROM UL 7.10 Electromagnetic compatibility 55 7.11 Description of the types of electrical connections or functional units 55 8 Test specications .55 8.1 General 55 8.2 Type tests 55 8.3 Routine tests .93 Annex A (Normative) Standards for Components Annex B (Normative) Standar
30、ds Referenced in the Trinational Busway Standard Annex C (Informative) Pressure Terminal Tightening Torque Annex D (Informative) Applicable Clauses Annex E (Informative) French Translations and Markings MARCH 25, 2009 NMX-J-148-ANCE-2009 CSA C22.2 NO. 27-09 UL 857 4UL COPYRIGHTED MATERIAL NOT AUTHOR
31、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA, and UL standard for Busways. It is the third edition of NMX-J-148-ANCE, the sixth edition of CSA C22.2 No. 27, and the thirteenth edition of UL 857. This edition of CSA C22.2 No. 27 sup
32、ersedes the previous edition published in 2000. This harmonized standard has been jointly revised on December 9, 2011. For this purpose, CSA and UL are issuing revision pages dated December 9, 2011, and ANCE is issuing a new edition dated December 9, 2011. This harmonized standard was prepared by th
33、e Association of Standardization and Certication (ANCE), the Canadian Standards Association (CSA), and Underwriters Laboratories Inc., (UL). The efforts and support of the CANENA Busway Technical Harmonization Committee are gratefully acknowledged. This Standard is considered suitable for use for co
34、nformity assessment within the stated scope of the Standard. The present Mexican Standard was developed by the CT CDI from the Comite de Normalizacion de la Asociacion de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the busway manufacturers and users. This standard was revie
35、wed by the CSA Subcommittee on Busways, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the A
36、merican National Standards Institute (ANSI) as an American National Standard. Where reference is made to a specic number of samples to be tested, the specied number is to be considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is
37、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 format but is not based on, nor is it considered equivalent to, an IEC standard. This standard is published as an
38、 equivalent standard for ANCE, CSA, and UL. An equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical national differences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Art
39、icle 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientic justication, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes. Interpretations The interpretation by
40、the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identie
41、d, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. DECEMBER 9, 2011 NMX-J-148-ANCE-2009 CSA C22.2 NO. 27-09 UL 857 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS
42、ION FROM UL ANCE Effective Date The effective date for ANCE will be announced through the Diario Ocial de la Federacin (Official Gazette) and is indicated on the cover page. CSA Effective Date The effective date for CSA International will be announced through CSA Informs or a CSA certication notice.
43、 UL Effective Date As of December 9, 2011 all products Listed or Recognized by UL must comply with the requirements in this standard except for clauses in the following list, which are effective December 9, 2013. Clauses 5.2.3.1 and 5.2.4.1 Between December 9, 2011 and December 9, 2013, new product
44、submittals to UL may be evaluated under all requirements in this standard or, if requested in writing, evaluated under presently effective requirements only. The presently effective requirements are contained in the Thirteenth edition of UL 857. A UL effective date is one established by Underwriters
45、 Laboratories Inc. and is not part of the ANSI approved standard. DECEMBER 9, 2011 NMX-J-148-ANCE-2009 CSA C22.2 NO. 27-09 UL 857 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Busways 1 Scope 1.1 Scope and object 1.1.1 This Standard appli
46、es to service-entrance, feeder, and branch-circuit busways and associated ttings rated at 600 V or less, 6 000 A or less, and intended for use in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), the National Electrical Code (NEC), NFPA 70, and the Mexican Standard for Electric
47、al Installations (Utility), NOM-001-SEDE, (see Annex B, Reference Item No. 1). These requirements do not apply to metal enclosed bus intended for connecting switchgear assemblies for use in prefabricated electric distribution systems. 1.1.2 For the purpose of these requirements, a busway is consider
48、ed to be a grounded metal enclosure containing factory mounted conductors that are usually copper or aluminum bars, rods, or tubes. 1.1.3 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 1.1.4 Unless otherwise indicated, all vol
49、tage and current values mentioned in this Standard are root-mean-square (rms). 1.2 Reference publications 1.2.1 Products covered by this standard shall comply with the reference installation codes and standards as appropriate for the country where the product is to be used. When the product is intended for use in more than one country, the product shall comply with the installation codes and standards for all countries where it is intended to be used. See A
