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CSA C22.2 NO. 191:M89 (R2019)
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.
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.