A split-phase motor has Start and Run windings.

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Multiple Choice

A split-phase motor has Start and Run windings.

Split-phase motors use two windings: a Start winding and a Run winding. The Start winding is there to create a phase-sh shifted current that provides the necessary starting torque, while the Run winding handles the steady-state operation once the motor is up to speed. After starting, the Start winding is typically disconnected (by a centrifugal switch or similar device), leaving only the Run winding energized for normal running. That combination of Start for starting and Run for running is exactly what defines this motor type, so the correct pairing is Start and Run. Options that duplicate the Start winding or use Main/Aux terminology don’t match the standard naming for these two essential functions.

Split-phase motors use two windings: a Start winding and a Run winding. The Start winding is there to create a phase-sh shifted current that provides the necessary starting torque, while the Run winding handles the steady-state operation once the motor is up to speed. After starting, the Start winding is typically disconnected (by a centrifugal switch or similar device), leaving only the Run winding energized for normal running. That combination of Start for starting and Run for running is exactly what defines this motor type, so the correct pairing is Start and Run. Options that duplicate the Start winding or use Main/Aux terminology don’t match the standard naming for these two essential functions.

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