A central electric furnace heating system installed in a home shall be connected to what type of circuit?

A central electric furnace heating system installed in a home shall be connected to what type of circuit?

• A. shall be permitted to be connected to a circuit that supplies other non-associated loads
• B. shall be connected to a circuit that supplies other loads
• C. shall be connected to an individual (dedicated) branch circuit
• D. shall be connected to a dedicated circuit only

Answer: (C)

Fixed electric space heating draws a large, steady amount of current, so it needs its own dedicated supply. A dedicated branch circuit guarantees the furnace has the correct ampacity, proper overcurrent protection, and a readily accessible disconnect, all independent from other loads in the home. This setup prevents other devices from sharing a circuit that could overload it or cause nuisance trips, and it makes service and safety checks much easier. The circuit should be sized to the furnace’s nameplate rating and installed with the proper conductors and disconnect at the equipment. Sharing a circuit with lighting, outlets, or other loads is not appropriate for a central electric furnace.

Fixed electric space heating draws a large, steady amount of current, so it needs its own dedicated supply. A dedicated branch circuit guarantees the furnace has the correct ampacity, proper overcurrent protection, and a readily accessible disconnect, all independent from other loads in the home. This setup prevents other devices from sharing a circuit that could overload it or cause nuisance trips, and it makes service and safety checks much easier. The circuit should be sized to the furnace’s nameplate rating and installed with the proper conductors and disconnect at the equipment. Sharing a circuit with lighting, outlets, or other loads is not appropriate for a central electric furnace.