Got a couple of customers with 600-900w transformers tripping breakers. Amp meter reads avg. 6 amps 7.5 right when it clicks on. All wiring been checked. All lights checked for proper voltage. All wiring sized and calculated correctly. Nothing else installed on the breaker. Just a receptacle dropped out of a panel. Discuss. Inrush amps & amps pulling. Anyone run across similar problems.