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.
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.
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.