we took the camper out, everything was going fine till we had to power, at the connection box the service disconnect breaker tripped, we had the a c on and i also had the electric water heater on. the guy on the next site helped me out and with his volt meter the plug for the 30 amp spot at the post showed 113 volts, the 50 amp showed 225 volts, i have a 30 amp system and my plug when we unplugged it was hot hot hot , no breakers in the camper were tripping just the service disconnect at the post, my question is should that 30 amp plug on the post been showing 120 volts and since it was showing 113 is 7 volts to low cause the breaker to trip and the plug get hot???? i have a 2003 prowler 25 j all i know the sticker is showing the water heater uses 11 amps not sure on the a c any idea ?????????