How Do You Wire A Single Phase 220 Volt Motor?
Most single-phase 220-volt alternating current (AC) motors are used for residential applications in well-water pumping or air-conditioning applications. Single-phase 220-volt AC motors are really two-phase 240-volt motors, especially when compared to three-phase 208-volt motors and single-phase 120-volt motors. This is because the motor’s single phase actually operates on the difference between the two 120-volt phases that comprise the residential 240-volt input. Wiring a single-phase 220-volt motor is straightforward. Turn off the power at the breaker that supplies the local blind (blank flat cover) electrical box with the feed that will supply your motor. The cable coming into this local box will have both of the 120-volt (opposite) phases, one with black and one with red insulation, common, with white insulation, and a green ground wire (which might also be a bare copper conductor). Your single-phase motor is going to run on the 240-volt difference between the black and the red wire
