Replace the fuse with a circuit breaker. It will trip at the same time, only it will reset itself. This won't solve your problem but will save on fuses till you find the problem. That fan shouldn't pull that many amps. Our school busses run two motors off one 20amp circuit with about 25 feet of wire or more. You could have a bad motor, two small of wire, or a bad switch. I believe you are right about the amp gauge. It should show what it is pulling. Joe
