1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 857 Busways STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE
2、PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Busways, UL 857 Thirteenth Edition, Dated March 25, 2009 Summary of Topics This revision of ANSI/UL 857 is being issued to reaffirm approval of the document as an American National Standard. No changes in requirements w
3、ere involved as part of this revision. As noted in the Commitment for Amendments statement located on the back side of the title page, UL, CSA, and ANCE are committed to updating this harmonized standard jointly. However, the revision pages dated August 23, 2016 will not be jointly issued by UL, CSA
4、, and ANCE as these revision pages only address UL ANSI approval dates. 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 with Proposal(s) on this sub
5、ject dated July 1, 2016. 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 UL. UL provides this Standard as is without war
6、ranty 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, including loss of prots, lost savings, loss of data
7、, 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 price paid for this Standard, regardless of the for
8、m 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 any error or deviation introduced while purchas
9、er is storing an electronic Standard on the purchasers computer system. AUGUST 23, 2016 UL 857 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 23, 2016 UL 857 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
10、ER REPRODUCTION OR DISTRIBUTION 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 Rep
11、rinted: August 23, 2016) ANSI/UL 857-2011 (R2016)UL 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 A
12、ssociation (CSA), and Underwriters 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, an
13、d UL. CSA and UL will issue 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
14、reserved in favor of ANCE. ISBN 978-1-55436-530-2 2009 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 Standards are subject to periodic review, and suggestions for their improvement will be referr
15、ed to the 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; a
16、nd rationale 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 2016 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic
17、copy of 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 August 23, 20
18、16. The most recent designation of ANSI/UL 857 as a Reaffirmed American National Standard (ANS) occurred on August 23, 2016. 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
19、 also excluded 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 purcha
20、se UL Standards, 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 FURT
21、HER REPRODUCTION 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
22、.3 External design 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 curr
23、ents 11 3 Classication 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 ) (o
24、f a circuit of 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
25、.13 5.1 General .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 .
26、22 7.1 Mechanical design .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 a
27、ssemblies by barriers 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 REPRO
28、DUCTION OR DISTRIBUTION 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
29、 (Normative) Standards 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
30、 MATERIAL NOT AUTHORIZED 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
31、CSA C22.2 No. 27 supersedes 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 standar
32、d was prepared by the 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 sui
33、table for use for conformity 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. Thi
34、s standard was reviewed 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 be
35、en approved by the American 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
36、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 format but is not based on, nor is it considered equivalent to, an IEC standard. This standar
37、d is published as an 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 accor
38、dance 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 considers appropriate. Presentation is word for word except for editorial changes. Interpretations Th
39、e 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 accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal t
40、ext has been identied, 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 DISTRIBU
41、TION WITHOUT PERMISSION 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
42、 certication notice. 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
43、, 2013, new product 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 establi
44、shed by Underwriters 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
45、 This Standard applies 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 S
46、tandard for Electrical 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,
47、a busway is considered 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 otherwis
48、e indicated, all voltage 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
49、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 Annex B for a list of reference publications. 1.2.2 For undated references to standards, such reference shall be considered to refer to the latest edition and all revisions to that edition up to the time when this standard was approved. For dated references to standards, such referenc
