Again, is Coach power 12 volt or 120 volt.? Are you referring to the Battery disconnect switch at the front door of the MH? (sometimes called a Salesman switch by newbies) It is a low amperage switch controlling a high amperage relay. Just like the starter on your car.
The word POWER can mean 120 volt AC or it can mean 12 volt DC. Two different systems.
Disconnect switch can mean 12 volt disconnect switch or 120 volt disconnect switch.
Not picking on you. "What we have here is a failure to communicate".
a problem in a forum world.