Quote:
Originally Posted by choi0706
isn't that what circuit breakers are for? if mounted next to the battery, it'll cut power before something happens.
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Not really.
If you remote mount the battery in the trunk, then you need a "circuit breaker" (fuse) large enough to still crank the starter (~100 Amps).
100 Amps is easily enough to start a fire without blowing your fuse.
Same thing in a house. Circuit breakers are designed to stop a "hard short".
There is nothing that says a fire cannot start in your house (due to a "soft" short) at less than 15 Amps (typical circuit breaker trip limit).
But you are correct that if an accident were to cut the lines, it would
likely blow the fuse, but not guaranteed.
An AC circuit breaker can still deliver ~1800 watts to whatever load before tripping. They are mostly there to keep from delivering so much current that the wires in the walls begin to heat.