Moroso 74100 Battery Disconnect Switch Rating: 20 amps @ 6-36 volts DC Required by many sanctioning bodies A quick twist of the non-slip handle shuts off all electrical current to the electric fuel pump, electric water pump, ignition, instruments, etc. For drag racing vehicles, the switch should be mounted on the vehicle's rear panel for easy accessibility For oval track and road racing applications, the switch should be mounted so that it can easily be reached by the driver or service personnel from outside the vehicle