1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 797 Electrical Metallic Tubing SteelUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
2、ER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electrical Metallic Tubing Steel, UL 797 Ninth Edition, Dated November 30, 2007 Summary of Topics Revisions are being issued for UL 797 to include new date code marking requirements for tubing new clauses 7.8, 7.9,
3、 and new informative Annex F. 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 revised requirements are substantially in accordance with Proposal(s) on this subject dated August 10, 2012 and October 5, 2012. Al
4、l 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 warranty of any kind, either e
5、xpressed 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, or any other damages aris
6、ing 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 form of the claim. Users of th
7、e 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 purchaser is storing an electronic
8、 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 indicated in the preface. The prior text for requirements that have been revi
9、sed 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 21, 2012 UL 797 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
10、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference June 21, 2014 Clause(s) 7.8, 7.9, F.1, and Table F1. DECEMBER 21, 2012 UL 797 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization
11、 and Certication NMX-J-536-ANCE Third Edition CSA Group CSA C22.2 No. 83.1-07 Second Edition Underwriters Laboratories Inc. UL 797 Ninth Edition Electrical Metallic Tubing Steel November 30, 2007 (Title Page Reprinted: December 21, 2012) ANSI/UL 797-2012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR
12、THER 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). Comments or pro
13、posals 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 to this standard
14、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 978-1-55436-521-0
15、 2007 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 appropriate committee. To submit a proposa
16、l 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 CSA Group Standards
17、and related publications, visit CSA Groups Online Store at www.shop.csa.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 altered in any way.
18、 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 Ninth Edition including revisions through December 21, 2012. The most recent designation of ANSI/UL 797 as a
19、n American National Standard (ANSI) occurred on December 21, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The Department of Defense (DoD) has adopted UL 797 on January 25, 1982. The publication of revised pages or
20、 a new edition of this Standard will not invalidate the DoD adoption. 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:/. T
21、o 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 DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 Scope .6 2 Normative references .6 3 Denitions 6 4 Units of measurement .7 5 Construc
22、tion 7 5.1 Tube 7 5.2 Finished tubing .8 5.3 Protective coatings .8 5.4 Elbows .10 5.5 Expanded-end integral couplings 11 6 Test requirements 11 6.1 Tube .11 6.2 Protective coatings 12 7 Markings 19 Annex A (normative) A.1 Normative references .25 Annex B (informative) B.1 Dimensions of EMT Steel .2
23、8 Annex C (informative) C.1 Coating tests overview .29 Annex D (informative) D.1 Examination of nished product by manufacturer 30 Annex E (informative) E.1 Alternative National Markings 31 Annex F (informative) F.1 Master Bundle Quantity .32 DECEMBER 21, 2012 NMX-J-536-ANCE CSA C22.2 NO. 83.1-07 UL
24、797 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 metallic tubing steel. It is the third edition of NMX-J-536-ANCE, the second edition of CSA C22.2 No. 83.1, and t
25、he ninth edition of UL 797. This edition of CSA C22.2 No. 83.1 supersedes the previous edition published in 2004. This edition of UL 797 supersedes the previous edition published June 30, 2004. This common standard was prepared by the Association of Standardization and Certication (ANCE), CSA Group,
26、 and Underwriters Laboratories Inc. (UL), and the conduit manufacturing industry. The efforts and support of the Technical Harmonization Subcommittee for Conduit and Tubing, of the Council of the Harmonization of Electrotechnical Standards for the Nations of the Americas (CANENA) are gratefully ackn
27、owledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. 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 Strategic Ste
28、ering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. This standard has been approved by the American National Standards Institute as an American National Standard. Where reference is made to a specic number of samples to be tested, the spe
29、cied 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 their particular purpose. Level of harmoni
30、zation This standard uses an 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 substantially the same in technical content, except a
31、s follows: Technical deviations are allowed for codes and governmental regulations and 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 protecti
32、on that the country considers appropriate. Presentation is to be word for word except for editorial changes. Reasons for differences from IEC The Technical Harmonization Subcommittee identied several IEC standards that address electrical conduit and tubing included in the scope of this standard. The
33、 IEC standards for electrical conduit and tubing are recognized as being generally system-specic, containing the requirements for the relevant conduits, tubing, and associated ttings in several discrete IEC standards. The THSC determined the safe use of electrical conduit and tubing is dependent on
34、the design and performance of the conduit and tubing systems with which they 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 tt
35、ings with those presently DECEMBER 21, 2012 NMX-J-536-ANCE CSA C22.2 NO. 83.1-07 UL 797 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL addressed in the known IEC standards. The THSC agreed such future investigation might be facilitated by
36、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 to be based on the literal text to determine compliance with the stan
37、dard 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 organizations to more accurately reect the intent. ANCE
38、 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 Group will be announced through CSA Informs or a CSA Group Certication Notice. UL effectiv
39、e date As of December 21, 2012, all products Listed or Recognized by UL must comply with the requirements in this standard except for Clauses 7.8, 7.9, and Annex F (Clause F.1 and Table F1) which are effective June 21, 2014. A UL effective date is established by Underwriters Laboratories Inc. and is
40、 not part of the ANSI approved standard. DECEMBER 21, 2012 NMX-J-536-ANCE CSA C22.2 NO. 83.1-07 UL 797 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Electrical Metallic Tubing Steel 1 Scope 1.1 These requirements cover electrical metallic
41、 tubing steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code, Part 1, NOM-001-SEDE, Standard for Electrical Installations, and NFPA 70, National Electrical Code (see Reference Item No. 1, Annex A). EMT is provid
42、ed with a zinc, zinc-based, nonmetallic, or other alternate corrosion-resistant exterior coating and an organic or zinc interior coating. It is the users responsibility to determine the appropriate product for their application. 1.2 Aluminum electrical metallic tubing is covered by the standards lis
43、ted in Reference Item No. 2, Annex A. 2 Normative references 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 produ
44、ct shall comply with the installation codes and standards 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 t
45、o applicable country publications. 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 reference shall be considered to ref
46、er to the dated edition and all revisions published to that edition up to the time the standard was approved. 3 Denitions 3.1 The following denitions apply in this standard. 3.2 Coating(s), alternate corrosion-resistant. A primary coating(s) other than one consisting solely of zinc, which upon evalu
47、ation has demonstrated the ability to provide the level of corrosion resistance required on the exterior of tubing. See Clause 6.2.4. Note: Coating(s) may include zinc. 3.3 Coating(s), organic. An interior coating(s), other than one consisting solely of zinc, which, upon evaluation, has demonstrated
48、 the ability to provide the level of corrosion resistance necessary where the coating is not subject to physical damage. See Clause 6.2.3. Note: Coating(s) may include zinc. 3.4 Coating(s), zinc. A primary coating consisting solely of zinc, which, upon evaluation, has demonstrated the ability to pro
49、vide the level of corrosion resistance required on the exterior of the tubing. See Clause 6.2.2. 3.5 Elbow. A manufactured curved section of EMT. NOVEMBER 30, 2007 NMX-J-536-ANCE-2007 CSA C22.2 NO. 83.1-07 UL 797 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.6 Electrical metallic tubing steel (EMT). An unthreaded steel raceway of circular cross-section designed for the p
