I'm new to the business and like most I'm starting out of the garage learning as I go. I've run into a problem with my flash unit. It trips before the element heats up completely, within just a couple of minutes. I just bought the unit and the ebay listing said it would run on a common 120V 20 amp household circuit. I'm using A heavy duty 12 gauge 15 amp 1875 w extension cord to run it. With my first few small jobs this wasnt an issue, it worked fine. But the other day when I started a run of 100 shirts, it started tripping on me. Any suggestions as to how I can get rolling again? I'm getting near a deadline and I'm stuck.