FIA 6-Pole Battery Master Switch

A battery master switch kills all power in the car with one turn of the key. The 6-pole version cuts the ignition as well as the battery, so the engine stops even while the alternator is still charging. The extra contacts protect the alternator when the circuit opens.

This is the switch FIA Annex J asks for on competition cars. The key comes out, and without it the car has no power.

Specifications

When fitting

• On the heavy cable from the positive battery terminal, using the M10 studs.
• The small contacts go on the ignition circuit, so opening the switch also stops the engine.
• The rules require the switch to be operable from outside the car: fit it where a marshal can reach it, with the lightning bolt sign next to it.