In a typical 3 wire start/stop station, where is the incoming control voltage wire terminated?

In a typical 3 wire start/stop control station, the incoming control voltage wire is terminated at the stop button, which is usually a normally closed contact. This configuration ensures that the circuit is complete and allows current to flow when the stop button is in its default state (closed).

When the stop button is pressed, it opens the circuit, interrupting the flow of current to the coil of the contactor or relay, thereby stopping the motor. The design relies on the normally closed stop button to provide a safe means of stopping the motor; as long as the button is not pressed, the circuit remains complete, allowing the start button to energize the control relay or contactor by closing its normally open contact.

This arrangement is crucial for maintaining operational safety and control over motor functions within an industrial setting.