Originally Posted by TXiceman
A lot of the trailers do not use a transfer switch. And depending on where you cut/disconnect wiring, you could have a hot 120volt circuit as well. To be on the safe side, wirenut and tape any wires you cut or disconnect.
If an automatic transfer switch isn't used, there will be a separate receptacle for plugging in the trailer electric cord to run off the generator. The 120-volt cable at the generator will not be "hot" at the generator when the RV is plugged into shore power or it would back-feed the generator which would damage it.
I have owned three RVs with on board factory installed generators and they either used a transfer switch or a separate receptacle. On two of those RVs I have removed the generators for service and continued using the RV connected to shore power while the generator was removed and the 120-volt connection at the generator was not "hot". The only wire that is "hot" is the 12-volt positive generator starter cable which I disconnected at the house batteries.