So my TT is going on 3 years old now, used several times a year, nothing crazy, and I am about to install my third 30 plug head. As I hold the plug in my hand, prongs facing me, the one on the left s...
I make sure I turn the breaker off before I plug in or unplug my shore cord,. Large arc when you don't. Yours sounds like a high draw of power with a loose receptacle or wires.