UL 6A-2008 UL Standard for Safety Electrical Rigid Metal Conduit - Aluminum Red Brass and Stainless Steel (Second Edition Reprint with Revisions Through and Including November 14 2_1.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 6A Electrical Rigid Metal Conduit Aluminum, Red Brass, and Stainless SteelUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIG

2、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electrical Rigid Metal Conduit Aluminum, Red Brass, and Stainless Steel, UL 6A Second Edition, Dated October 31, 2008 Summary of Topics UL 6A is being revised to incorporate th

3、e following requirements in clauses 5.3.4, 6.2.1, 7.7, 7.8, 7.9, and Annex A: 1. Marking Limitation on Small Trade Size Elbows and Nipples 2. Conduit with a Protective Coating for Use with Threaded Couplings Text that has been changed in any manner or impacted by ULs electronic publishing system is

4、marked with a vertical line in the margin. The revised requirements are substantially in accordance with Proposal(s) on this subject dated March 28, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electr

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9、, 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. NOVEMBER 14, 20

10、14 UL 6A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 14, 2014 UL 6A tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardiza

11、tion and Certication NMX-J-576-ANCE Second Edition CSA Group CSA C22.2 No. 45.2-08 First Edition Underwriters Laboratories, Inc. UL 6A Second Edition Electrical Rigid Metal Conduit Aluminum, Red Brass, and Stainless Steel October 31, 2008 (Title Page Reprinted: November 14, 2014) ANSI/UL 6A-2014UL C

12、OPYRIGHTED 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), Canadian Standards Association (operating as “CSA Group”), and Underwriters L

13、aboratories Inc. (UL). 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

14、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 Group and UL pages. Copyright 2014 ANCE Rights reserved in

15、 favor of ANCE. ISBN 978-1-55436-679-8 2008 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to periodic review, and suggestions for its improvement will be referred to the appr

16、opriate committee. 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 ch

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18、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 Second Edition including revisions through November 14, 2014. The most

19、 recent designation of ANSI/UL 6A as an American National Standard (ANSI) occurred on November 14, 2014. 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 b

20、e 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 Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE

21、PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 Scope .6 2 Normative references 6 3 Denitions 6 4 Units of measurement .7 5 Construction 7 5.1 Tube 7 5.2 Finished conduit 8 5.3 Protective coatings 10 5.4 Threading and chamfering 10 5.5 Nipples .11 5.6 Elbows .14 5.7 Threa

22、ded couplings 14 6 Test requirements 15 6.1 Tube .15 6.2 Protective coatings 16 7 Markings 16 17 Annex A (normative) A1 Normative references .19 Annex B (informative) B1 Dimensions of conduit .20A Annex C (informative) C1 Examination of nished product by manufacturer .21 Annex D (normative) D1 Alter

23、native National Markings 22 NOVEMBER 14, 2014 NMX-J-576-ANCE CSA C22.2 NO. 45.2-08 UL 6A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common ANCE, CSA Group, and UL standard for electrical rigid metal conduit aluminum

24、, red brass, and stainless steel. It is the second edition of NMX-J-576-ANCE, the rst edition of CSA C22.2 No. 45.2, and the second edition of UL 6A. This edition of UL 6A supersedes the previous edition published on July 21, 2000. This common standard was prepared by the Association of Standardizat

25、ion and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the conduit manufacturing industry and the Technical Harmonization Subcommittee for Conduit and Tubing of the Council on the Harmonization of Electrotechnical Standards of the Nations of the Am

26、ericas (CANENA) are gratefully acknowledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. The present Mexican standard was developed by CT Technical Committee 23 Electrical Accessories from the Comite de Normalizacion de la Asociacio

27、n de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the metal conduit and tubing manufacturers and users. This standard was reviewed by the CSA Subcommittee on Metal Conduit and Tubing, under the jurisdiction of the CSA Technical Committee on Wiring Products and the CSA Strate

28、gic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a spec

29、ic 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 important to note that it remains the responsibility of the users of the standard to judge its suitability for

30、their particular purpose. Level of harmonization This standard uses the IEC format but is not based on, nor is it to be 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 substantia

31、lly 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 Article 905, for example, because of fundamental climatic, geographical, technological, or infrastruct

32、ural factors, scientic justication, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes. Reasons for differences from IEC The Technical Harmonization Subcommittee identied several IEC standards that address electrical conduit

33、and tubing included in the scope of this standard. The IEC standards for electrical conduit and tubing are recognized as being generally system-specic, containing the requirements for the relevant conduits and cables and associated ttings in several discrete IEC standards. NOVEMBER 14, 2014 NMX-J-57

34、6-ANCE CSA C22.2 NO. 45.2-08 UL 6A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL The THSC determined the safe use of electrical conduit and tubing is dependent on the design and performance of the conduit and tubing systems with which the

35、y are intended to be installed. Signicant investigation is required to assess safety and system compatibility issues that may lead to harmonization of traditional North American electrical conduit and tubing and associated ttings with those presently addressed in the known IEC standards. The THSC ag

36、reed such future investigation might be facilitated by the completion of harmonization of the North American standards for electrical conduit and tubing and their ttings. Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on t

37、he 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 identied, a revision is to be proposed as soon as possible to each of the standards development or

38、ganizations to more accurately reect the intent. 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 Group Effective Date The effective date for CSA International will be announced throu

39、gh a CSA Informs or CSA Group Certication Notice. UL effective date As of November 14, 2014, all products Listed or Recognized by UL must comply with the requirements in this standard. A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved stand

40、ard. NOVEMBER 14, 2014 NMX-J-576-ANCE CSA C22.2 NO. 45.2-08 UL 6A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Electrical Rigid Metal Conduit Aluminum, Red Brass, and Stainless Steel 1 Scope 1.1 These requirements cover aluminum (ERMC-A)

41、 and stainless steel (ERMC-SS) electrical rigid metal conduit, nipples, elbows, and couplings in 12 155 (3/8 6) trade sizes for use as metal raceway for the installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code, Part 1, NOM-001-SEDE, Standard for Electrical Installa

42、tions, and NFPA 70, National Electrical Code (see Reference Item No. 1, Annex A). It is the users responsibility to determine the appropriate product for the application. 1.2 These requirements also cover red brass (ERMC-RB) electrical rigid metal conduit, nipples, elbows, and couplings in 16 (1/2)

43、trade size for use as metal raceway for the installation of wires and cables in direct burial and swimming pool applications in accordance with the applicable national electrical installation codes. 1.3 Steel conduit is covered by the standards listed in Reference Item No. 2, Annex A. 2 Normative re

44、ferences 2.1 Products covered by this standard shall comply with the reference installation codes and standards 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 standar

45、ds for all countries where it is intended to be used. A Reference Item No. is provided at the point of use for each reference in this standard. See Annex A for a list of reference publications and the correlating list of reference item numbers to applicable country publications. 2.2 Undated referenc

46、es to standards shall be considered to refer to the latest edition and all revisions to that edition up to the time when this standard was approved. Dated references to standards shall be considered to refer to the dated edition and all revisions published to that edition up to the time the standard

47、 was approved. 3 Denitions 3.1 The following denitions apply in this standard. 3.2 Elbow A manufactured curved section of conduit threaded on each end. 3.3 Electrical rigid metal conduit aluminum (ERMC-A) A threadable aluminum raceway of circular cross-section designed for the physical protection an

48、d routing of wire conductors and use as an equipment grounding conductor when installed utilizing appropriate ttings. 3.4 Electrical rigid metal conduit red brass (ERMC-RB) A threadable red brass raceway of circular cross-section designed for the physical protection and routing of wire conductors an

49、d use as an equipment grounding conductor when installed utilizing appropriate ttings. 3.5 Electrical rigid metal conduit stainless steel (ERMC-SS) A threadable stainless steel raceway of circular cross-section designed for the physical protection and routing of wire conductors and use as an equipment grounding conductor when installed utilizing appropriate ttings. OCTOBER 31, 2008 NMX-J-576-ANCE CSA C22.2 NO. 45.2-08 UL