1. Scope 1.1 This Specification applies to portable and stationary, industrial type heating equipment for potentials of 600 volts and less, designed to be used in ordinary (ie, non-hazardous) locations in accordance with the rules of Part I of this Code. 1.2 This Specification applies to heat treating and other special-use furnaces, infrared mobile and stationary drying ovens, st eam boilers and distilling equipment of the electrode or resistance-element type, liquid-heaters, electrically-heated presses, and similar equipment. 1.3 This Specification does not apply to: (a) equipment utilizing high-frequency alternating currents;
(b) soldering irons, tube vulcanizers, and similar small devices which, although often used in industrial premises, normally have enclosures, spacings, and other constructional features similar to appliances; or
(c) air-heaters for industrial establishments, which are covered in the latest issue of CSA Specification C22.2 No. 46, Electric Air-Heaters.