This is the harmonized ANCE, CSA Group, and UL standard for Electrical Nonmetallic Tubing. It is the First edition of NMX-J-851-ANCE, the fifth edition of CSA C22.2 No. 227.1 and the third edition of UL 1653. This edition of CSA C22.2 No. 227.1 supersedes the previous editions published in 1997 and 2006. This edition of UL 1653 supersedes the previous edition published in 2006. This harmonized standard has been jointly revised on March 30, 2022. For this purpose, CSA Group and UL are issuing revision pages dated March 30, 2022, and ANCE is issuing a new edition dated March 30, 2022.
This harmonized standard was prepared by the Association of Standardization and Certification, (ANCE), CSA Group and Underwriters Laboratories Inc. The efforts and support of the Technical Harmonization Committee 23A ENT Working Group 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 the CT 23 Electrical Accessories (Wiring Devices) from the Comité de Normalización de la Asociación de Normalización y Certificación, A.C., CONANCE, with the collaboration of the electrical manufacturers and users.
This standard was reviewed by the CSA Subcommittee on Nonmetallic Conduit, Tubing, and Fittings, 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. 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.
This Standard applies to corrugated electrical nonmetallic tubing (ENT) and mechanically-attached fittings, for use in accordance with C22.1, Canadian Electrical Code, Part I (CE Code), NFPA 70, National Electrical Code (NEC) and NOM-001-SEDE, Standard for Electrical Installations (Mexico). These requirements also apply to mechanically-attached fittings integral with an outlet box.
Products covered by this Standard are intended for use:
a) at a maximum continuous operating temperature of 75°C (167°F);
b) at a maximum ambient temperature of 50°C (122°F);
c) in attics provided that the ENT is installed no higher than 900 mm (3 ft) above the bottom of the ceiling joist, and the ENT material is rated minimum 60°C (140°F); and
d) underground (direct burial), in Canada only.
This Standard does not apply to fittings that are intended to be joined by solvent cement. Solvent-attached fittings are covered by UL 651 or CSA C22.2 No. 211.2. Solvent-attached fittings integral with an outlet or flush device box are covered by UL 514C or CAN/CSA-C22.2 No. 85.
For products intended for use in Canada, general requirements are given in CSA-C22.2 No. 0.