Special Features:

Used on compressor unit that refills life support oxygen tanks for fire fighting equip.

Properties:

A manually operated item specifically designed to close the circuit of a starter, engine, electrical or the control circuit of its attendant solenoid. It must include a vacuum lock-out mechanism or utilize a switch contact independently mounted on the starter. For switches with integral contacts and no vacuum lock-out, see switch (as modified). See also relay-solenoid, engine starter, electrical and starter, motor.