Time to experiment.
Brian, If it blows in one second than its probably not the motor start switch.
Brian, if you remove the fuse from the circuit, does your breaker box trip? Take the two wires off of the fuse and tie them together. Then start the washer, don't let it run for more than 10 seconds, does you circuit breaker trip?
When powering up the washer, do not touch the machine in any way when making this test.
Make this test in fill. Then do it in wash. Then do it again in spin. What happens?