FIXED ELECTRIC SPACE

HEATING EQUIPMENT A. General 424-1. Scope. This article covers fixed electric equipment used for space heating. For the purpose of this article, heating equipment shall include heating cable, unit heaters, boilers, central systems, or other approved fixed electric space heating equipment. This article shall not apply to process heating and room air conditioning. 424-2. Other Articles. All requirements of this Code shall apply where applicable. Fixed electric space heating equipment for use in hazardous (classified) locations shall comply with Articles 500 through 517. Fixed electric space heating equipment incorporating a hermetic refrigerant motor-compressor shall also comply with Article 440. 424-3. Branch Circuits. (a) Branch-Circuit Requirements. Individual branch circuits shall be permitted to supply any size fixed electric space heating equipment. Branch circuits supplying two or more outlets for fixed electric space heating equipment shall be rated 15, 20, or 30 amperes. Exception: In other than residential occupancies, fixed infrared heating equipment shall be permitted to be supplied from branch circuits rated not over 50 amperes. (b) Branch-Circuit Sizing. The ampacity of the branch-circuit conductors and the rating or setting of overcurrent protective devices supplying fixed electric space heating equipment consisting of resistance elements with or without a motor shall not be less than 125 percent of the total load of the motors and the heaters. The rating or setting of overcurrent protective devices shall be permitted in accordance with Section 240-3(b). A con-