see, there i go again. you got me thinking, a switch is a switch, right?
how can it not handle a current?
because a wire is not a wire(the same reason they have different thickness off wires in a car, all is 12V, but amps are different) . it has to be able to take the amps and not burn through or heat up and melt.
He he..
In a house; lots of volts but not much amps
In a car; lots ov ampsr and not much volt
As Niclas state, make sure your switch can handle it. A typical main switch for a car can take from 150 amps to 500 amps. Look at your battery, what is the peak amps? Cold start amps? Quite high is my guess.