What type of electrical breaker is typically used for a residential gas furnace?

A residential gas furnace typically requires a single-pole breaker to supply the necessary voltage for its operation. A 1 pole, 15 amp breaker is commonly used in this scenario as it is adequate for providing power to controls and ignition systems without exceeding the requirements of most gas furnaces. These furnaces generally do not consume high electrical current, making a 15 amp breaker suitable for household applications.

The use of a 1 pole breaker aligns with residential wiring practices, where equipment requiring 120 volts is connected. Additionally, a 15 amp rating is standard for many household appliances and is designed to protect the wiring from overcurrent situations, preventing potential hazards such as overheating or electrical fires.

In contrast, other breaker options listed, such as a 2 pole, 30 amp breaker or a 3 pole, 20 amp breaker, are more suitable for larger appliances that require a higher voltage and current, such as electric furnaces or central air conditioning systems. A 1 pole, 10 amp breaker would not typically provide sufficient power for most gas furnace operations. Thus, the 1 pole, 15 amp breaker is the best fit for safely powering a residential gas furnace.