What position is a push-to-break switch usually in?

A push-to-break switch is typically designed to open a circuit when pressed, which temporarily breaks the flow of electricity. As such, its usual position when not being actively used is in the "on" state. This means that when the switch is not being pressed, the circuit remains closed and electricity continues to flow, allowing the system to function normally.

In the context of emergency systems or specific applications, the switch is engaged during an emergency to cut off power, but under regular operating conditions, it remains in the "on" position until the need to interrupt the current arises. Therefore, "on" effectively represents its default state, making this the appropriate choice.