NEC 422.12 requires central heating equipment to have its' own circuit. This circuit can be used for associated pumps, fans, etc., but for nothing else. The size of the circuit depends upon the ratings of the appliance. If there is no specific requirement, then NEC 210.3 implies a minimum 15 amp rating for the circuit.
FLEX wiringIf the wiring is exposed, ie. on the outside of... 4 REPLIES