CSA C22.2 No. 45.2:08

National Standard of Canada

(reaffirmed 2018)

Electrical Rigid Metal Conduit — Aluminum, Red Brass, and Stainless Steel

REVISED MARCH 2021

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National Standard of Canada

CSA C22.2 No. 45.2:08

Electrical Rigid Metal Conduit — Aluminum, Red Brass, and Stainless Steel

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

ICS 29.120.10

Revision History

CSA C22.2 No. 45.2:08, Electrical Rigid Metal Conduit — Aluminum, Red Brass, and Stainless Steel — originally published October 2008

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National Standard of Canada — December 2018

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

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CSA C22.2 No. 45.2:08 Errata

The following is a list of revisions, additions and deletions to CSA C22.2 No. 45.2:08:

Errata — March 2021

March 2021 © 2008 Canadian Standards Association 1

MARCH 5, 2021 NMX-J-576-ANCE ♦ CSA C22.2 No. 45.2-08 ♦ UL 6A 5

Preface

This is the harmonized ANCE, CSA Group, and UL standard for electrical rigid metal conduit – aluminum, red brass, and stainless steel. It is the second edition of NMX-J-576-ANCE, the first edition of CSA C22.2 No. 45.2, and the second edition of UL 6A. This harmonized standard has been jointly revised on March 5, 2021. For this purpose, CSA Group and UL are issuing revision pages dated March 5, 2021, and ANCE is issuing a new edition dated March 5, 2021.

This harmonized standard was prepared by the Association of Standardization and Certification (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 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 CT Technical Committee 23 Electrical Accessories from the Comite de Normalizacion de la Asociacion de Normalizacion y Certificacion, 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 Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.

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 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 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 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 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 and cables and associated fittings in several discrete IEC standards.

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

6 NMX-J-576-ANCE ♦ CSA C22.2 No. 45.2-08 ♦ UL 6A MARCH 5, 2021

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 the 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 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.

NOVEMBER 14, 2014 NMX-J-576-ANCE  CSA C22.2 NO. 45.2-08  UL 6A 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 conduit 8

   3. Protective coatings 10

   4. Threading and chamfering 10

   5. Nipples 11

   6. Elbows 14

   7. Threaded couplings 14

6. Test requirements 15

   1. Tube 15

   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 finished product by manufacturer 21

Annex D (normative)

D1 Alternative National Markings 22

6 NMX-J-576-ANCE  CSA C22.2 NO. 45.2-08  UL 6A OCTOBER 31, 2008

Electrical Rigid Metal Conduit – Aluminum, Red Brass, and Stainless Steel

1. Scope

   
   

   1. These requirements cover aluminum (ERMC-A) 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 Installations, and NFPA 70, National Electrical Code (see Reference Item No. 1, Annex A). It is the user’s responsibility to determine the appropriate product for the application.

      
      

   2. These requirements also cover red brass (ERMC-RB) electrical rigid metal conduit, nipples, elbows, and couplings in 16 (1/2) 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.

      
      

   3. Steel conduit 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 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. Undated references 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 was approved.

      
      

3. Definitions

   
   

   1. The following definitions apply in this standard.

      
      

   2. Elbow — A manufactured curved section of conduit threaded on each end.

      
      

   3. Electrical rigid metal conduit – aluminum (ERMC-A) — A threadable aluminum 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 fittings.

      
      

   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 and use as an equipment grounding conductor when installed utilizing appropriate fittings.

      
      

   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 fittings.