Here is a simple illustration of how shore power is wired for a 50 amp RV service, along with how the coach appliances can be wired.
We ran a PrevostH45 coach as a commercial demonstration of our product line of video equipment for cable head ends some years ago...that coach had a 10 KW genset and a 50 amp shore power connection because we had lots of instrumentation and video processing equipment inside and used 4 air conditioners (two of which were in the basement...) Yes, that is an automatically positioned 5 foot dish on top that had flux gate compass and GPS positioning.
Chuck