This figure includes a common motor start circuit, as it would appear on an
electrical drawing. To start the motor, someone depresses the start button
located next to the motor or on the starter housing itself. If the overload relay
contacts are closed—that is, if the motor is not overloaded—this action completes
the circuit to the coil in the motor contactor. As the coil is energized,
coil contact “C” closes, or “seals” the start, and the motor starts.