CAN/CSA-C22.2 NO. 191-M89 (R2014)
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1.1 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.
1.2 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.
GST REG No R119441681
QST REG No R1006017360