I usually try to steer clear of the electrical threads.
It appears there's a lot of confusion with the difference concerning 30 amp (3 pole) or 50 amp (4 pole) service.
Seems like when talking 50 amp folks will speak of 220 volts to the coach.
In the trailer we have the 4\10 gauge line from a commercial source is 110 carried on a split hot line.
One line feeds the AC\IPO, microwave, convertor and fast recovery water heater.
The second line feeds everything else.
I actually didn't realize our trailers wiring was split until I tried to whip up a home adapter for basic power needs on the curb.
Plugged in my adapter and quickly realized the mistake.
Disassembled the plug and jumped a lead to the other hot spade.
Everything in the trailer that uses AC is 110 volts.
So even though we talk 220 volts on a 50 amp service line it is essentially 2 separate 110 inputs.
Our coach doesn't actually use 220 anywhere.
