scope:

This Standard applies to cord-connected and permanently connected engine heaters and battery warmers for use on nominal system voltages of 600 V and less that are designed to be used in nonhazardous locations such as in passenger automobiles, light trucks, and heavy duty on- and off-road vehicles in accordance with the Rules of the Canadian Electrical Code, Part I.

This Standard applies to standard and heavy duty engine heaters, which include the following types:

(a) Internal and external coolant immersion;

(b) Internal and external oil immersion; and

(c) External surface.

The heavy duty classification also includes the oil-circulating immersion type.