Main Breaker arcs when electric dryer is running
I replaced main breaker about a year ago and at that time saw that it had been arcing and the contacts on the box were black and pitted. Last weekend lost power several times for a few seconds. After checking the breaker box (no breakers tripped), I heard the main breaker arcing when dryer was running. I decided to replace the whole breaker box, but after doing so, I ran the dryer again and still heard occasional arcing after putting in new box with new main breaker. Is there anything I can do to stop the arcing of the main breaker when the dryer runs and is this a common problem?