Two-Pole Contactor

Two-pole contactors are used on services that require lighting controls. On Type A and C services, the contactor switches all circuits on and off, and is the same size or larger than the main breaker. On Type D services, the contactor switches only the lighting circuit and is the same size or larger than the lighting breaker, typically 30 amps. Standard contactor sizes are 30, 60, 100, and 200 amps.