C22.2 No. 83.1-07

National Standard of Canada

(reaffirmed 2017)

Electrical Metallic Tubing — Steel

REVISED MARCH 2021

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Revision History

C22.2 No. 83.1-07, Electrical Metallic Tubing — Steel — originally published November 2007

Note: For information about the Standards Update Service or if you are missing any updates go to store.csagroup.org or techsupport@csagroup.org.

Revisions issued: Update No. 1 — December 2012

National Standard of Canada — March 2021

Outside front cover, National Standard of Canada text, and title page.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

C22.2 No. 83.1-07 Update No. 2

The following is a list of revisions, additions and deletions to C22.2 No. 83.1-07:

Update No. 2 — March 2021

National Standard of Canada — March 2021

March 2021 © 2007 Canadian Standards Association 1

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National Standard of Canada

C22.2 No. 83.1-07

Electrical Metallic Tubing — Steel

®A trademark of the Canadian Standards Association, operating as “CSA Group”

ICS 29.120.99

MARCH 30, 2021 tr1

Standard for Safety for Electrical Metallic Tubing – Steel

Second Edition, Dated November 30, 2007

Summary of Topics

This revision dated March 30, 2021 includes the following changes in requirements:

• Annex A Normative References Update;

  
  

• Interpretation of Flammability Test Result for a Thin Nonmetallic Topcoat (Outermost Layer) of an Alternate Corrosion Protection System; 6.2.4.11.1

  
  

• Clarification of Elbow and Bend Radius Requirements, Removal of the Term Mandrel, Addition of Exemption for Supplementary Coatings from Bend Test to Better Align with RMC Standard and Editorial Changes; 5.4.3, Table 5.2, 6.1.2, 6.1.3, 6.2.1.1 – 6.2.1.3, 6.2.1.5 and Figure 2

tr2 MARCH 30, 2021

No Text on This Page

Association of Standardization and Certification 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: March 30, 2021)

ANSI/UL 797-2021

Commitment for Amendments

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ISBN 978-1-55436-521-0 © 2007 Canadian Standards Association

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MARCH 30, 2021 NMX-J-536-ANCE ♦ CSA C22.2 No. 83.1-07 ♦ UL 797 5

Preface

This is the harmonized 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 the 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 harmonized standard has been jointly revised on March 30, 2021. For this purpose, CSA Group and UL are issuing revision pages dated March 30, 2021, and ANCE is issuing a new edition dated March 30, 2021.

This harmonized standard was prepared by the Association of Standardization and Certification (ANCE), CSA Group, 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 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 the CT 23 Electrical Accesories from the Comite de Normalizacion de la Asociacion de Normalizacion y Certificacion, A.C., CONANCE, with the collaboration of the Electrical Metallic tubing – steel 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 Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. This standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Application of Standard

Where reference is made to a specific number of samples to be tested, the specified 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 harmonization

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 as 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, scientific justification, or the level of protection 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 identified several IEC standards that address electrical conduit and tubing included in the scope of this standard. The IEC standards for electrical conduit and tubing are recognized as being generally system-specific, containing the requirements for the relevant conduits, tubing, and associated fittings in several discrete IEC standards.

6 NMX-J-536-ANCE ♦ CSA C22.2 No. 83.1-07 ♦ UL 797 MARCH 30, 2021

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 they are intended to be installed. Significant 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 fittings with those presently addressed in the known IEC standards. The THSC agreed such future investigation might be facilitated by completion of harmonization of the North American standards for electrical conduit and tubing and their fittings.

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 standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identified, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reflect the intent.

DECEMBER 21, 2012 NMX-J-536-ANCE  CSA C22.2 NO. 83.1-07  UL 797 3

CONTENTS

Preface 4

1. Scope 6

2. Normative references 6

3. Definitions 6

4. Units of measurement 7

5. Construction 7

   1. Tube 7

   2. Finished tubing 8

   3. Protective coatings 8

   4. Elbows 10

   5. Expanded-end integral couplings 11

6. Test requirements 11

   1. Tube 11

   2. Protective coatings 12

7. Markings 19

Annex A (normative)

A.1 Normative references 25

Annex B (informative)

B.1 Dimensions of EMT – Steel 28

Annex C (informative)

C.1 Coating tests overview 29

Annex D (informative)

D.1 Examination of finished product by manufacturer 30

Annex E (informative)

E.1 Alternative National Markings 31

Annex F (informative)

F.1 Master Bundle Quantity 32

6 NMX-J-536-ANCE-2007  CSA C22.2 NO. 83.1-07  UL 797 NOVEMBER 30, 2007

Electrical Metallic Tubing – Steel

1. Scope

   
   

   1. These requirements cover electrical metallic 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 provided 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.

      
      

   2. Aluminum electrical metallic tubing is covered by the standards listed in Reference Item No. 2, Annex A.

      
      

2. Normative references

   
   

   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. 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. 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 refer to the dated edition and all revisions published to that edition up to the time the standard was approved.

      
      

3. Definitions

   
   

   1. The following definitions apply in this standard.

      
      

   2. Coating(s), alternate corrosion-resistant. A primary coating(s) other than one consisting solely of zinc, which upon evaluation 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. Coating(s), organic. An interior coating(s), other than one consisting solely of zinc, which, upon evaluation, has demonstrated 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.

      
      

   4. Coating(s), zinc. A primary coating consisting solely of zinc, which, upon evaluation, has demonstrated the ability to provide the level of corrosion resistance required on the exterior of the tubing. See Clause 6.2.2.

      
      

   5. Elbow. A manufactured curved section of EMT.