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 an d UL are issuing revision pages dated March 30, 2021, and ANCE is issuing a new edition dated March 30, 2021.
This iharmonized 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.
Scope
1.1
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.
1.2
Aluminum electrical metallic tubing is covered by the standards listed in Reference Item No. 2, Annex A.
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Electrical Metallic Tubing - Steel (Bi-National standard, with UL 797)
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