On racing circuits, it's compulsory to install this type of switch on the outside of your car, enabling you to cut off the entire power circuit in a jiffy. But it's not just a requirement on racetracks, at many classic car shows it's a requirement that the battery be disconnected due to the risk of fire, and even then, a main switch, also known as a grounding switch, isn't a luxury.
Even if your car is stored over winter, we recommend that you install a main switch. If you don't do it to avoid short circuits, for example, it's still useful that your battery isn't drained during this period by power consumers that aren't activated via the ignition, such as the radio or clock.
This main switch is mounted between the negative pole of the battery and the grounding cable, and has mounting holes that allow it to be installed in many locations.
If the switch is mounted outside the car, it's good to know that it comes with a waterproof cover, which can also be removed for use inside the car if required. The key remains in the lock when switched on, and a waterproof cap around the key ensures that no moisture can enter the lock even then.
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