CSA C22.2 NO. 25-17 PDF Download

The CSA C22.2 NO. 25-17 standard is specifically designed to regulate the construction and use of enclosures for electrical equipment in hazardous environments. This fourth edition of the standard supersedes previous editions published in 1966, 1950, and 1936, and includes several important changes.

The standard's scope encompasses enclosures for electrical equipment, excluding lighting fixtures, that are intended for use in Class II, Division 1, Groups E, F, and G hazardous locations as specified in CSA C22.1, the Canadian Electrical Code, Part I. These hazardous locations are classified based on the presence of combustible dust or ignitable fibers or flyings.

Notable changes in this edition include updating the title and scope to specify Class II, Division 1, adding requirements for non-metallic enclosures, introducing an alternative dust exclusion test, incorporating metric dimensions, providing optional marking for Division and temperature, and rearranging the content according to current editorial practices.