CSA C22.2 NO. 27:25

Preface This is the harmonized ANCE, CSA Group, and ULSE standard for Busways . It is the fourth edition of NMX-J-148-ANCE, the seventh edition of CSA C22.2 No. 27, and the fourteenth edition of UL 857. This edition of NMX-J-148-ANCE supersedes the previous edition published on December 9, 2011. This edition of CSA C22.2 No. 27 supersedes the previous edition published on March 25, 2009. This edition of UL 857 supersedes the previous edition published on April 9, 2021. This harmonized standard was prepared by the Association of Standardization and Certification (ANCE), CSA Group, and ULSE. The efforts and support of the Technical Harmonization Committee for Connectors, 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 CDI from the Comite de Normalizacion de la Asociacion de Normalizacion y Certificacion, A.C., CONANCE, with the collaboration of the busway manufacturers and users. This Standard was reviewed by the CSA Subcommittee on Busways, under the jurisdiction of the CSA Technical Committee on Industrial 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. Scope 1.1 This Standard applies to service-entrance, feeder, and branch-circuit busways and associated fittings rated at 1000 V or less, 6000 A or less, and intended for use in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), NFPA 70®, National Electrical Code® (NEC®), and the Mexican Standard for Electrical Installations (Utility), NOM-001-SEDE. These requirements do not apply to metal enclosed bus intended for connecting switchgear assemblies for use in prefabricated electric distribution systems. NFPA 70®, National Electrical Code®, and NEC® are registered trademarks of the National Fire Protection Association, Quincy, MA. 1.2 For the purpose of these requirements, a busway is considered to be a grounded metal enclosure containing factory-mounted conductors that are usually copper or aluminum bars, rods, or tubes. 1.3 Requirements stated throughout this Standard for fittings apply to tap boxes, feed boxes, plug-in devices, and similar fittings, but do not apply to busway elbows, tees, and crosses.