This sounds redundant, to me anyway, 220 is two 110 volt circuits, if you are saying that the coach uses two circuits of the same phase then that would be to much of a draw of amperage off of the panel buss, unless there is a appliance that uses 220 on the coach, using 220 volt 50 amp two pole circuit breaker for the coach is the way to go, a 4 wire configuration, 220 volt with neutral with ground, jmho,
you can not get 220 on a single branch circuit. the only way you could get other than 110 volts to ground on a single circuit is if you have a three phase delta system, then you would only get the maximum
of about 180 volts to ground or neutral, and then that would pose a real problem.
unless your in Europe
Originally Posted by Flybob
Do not plug your RV into the 220 outlet it could damage it. The Car probably uses true 220V while the RV actually uses two legs of the 220 configures as two separate 110V circuits.