My Synchrowave 250 is plugged into a 50 amp circuit. The most I've cranked it up to is 150 amps AC. The funny thing is that the breaker never blows under load. It will trip while the fan is running and I'm not welding with it. It has blown with the machine dialed at 100 amps also.The prior owner, who was it's original, states he never ran it over 100 amps. I can't see him dealing with the breaker blowing all the time. He had it plugged into a 50 amp circuit as well. I'm thinking I have a bad breaker, but am I expecting something unrealistic from this machine on a 50 amp circuit?