I've encountered 2 cases of reverse polarity on 30A plug and 3 on a 20A plug. 3 cases of open ground or open neutral on a 20A plug. Two cases of high voltage on a 30A plug. Many cases of low voltage on 20A and 30A plugs.
One case of low voltage on 50A plug. This was a somewhat older CG with adjacent 30A and 50A sites on a very hot summer day with lots of A/Cs running. I had no way to determine if the problem was due to the CG wiring or a utility problem.
One night I had 160V on a 30A plug and the problem was a open neutral, the PI shut down, continued to display the voltage and high voltage error and I could not get the plug pulled fast enough. You may be thinking that a open neutral and 160V are impossible on a 30A plug - while not common the problem was a open neutral in the CG 120/240V distribution system.
Right now I'm at a 30A plug with good power. But the 20A GFCI plug on the pedestal which I was also going to use has a open neutral. I'll let the CG know.
But who's counting power problems? :h
