On the racing circuit it is mandatory that this switch is mounted on the outside of your car with which you switch off the entire power circuit with one turn. Even if your car is in the garage during the winter period, it is advisable to mount a isolator switch to assure that your battery is not drained.
This isolator switch is mounted between the - pole of the battery and the ground cable and provided with mounting holes. The switch is mounted with a watertight cap for mounting outside the car which can be removed for inside mountng,