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Who is the Manufacturer of the RV?
Which circuit breaker is tripping?
Do you have a generator?
This may be difficult to troubleshoot. First off when you run the generator will it trip any breakers with the coach unplugged? Which breaker is tripping? Do you have an Inverter or Converter? Have you checked anything yet?
This is what I would try. Turn off all the breakers inside the coach except for the Main breaker. The reason being if you have a shorted out heating element say in the hot water heater it could cause the breaker to trip right away. If it does not trip with the main breaker on then start turning them on one at a time, if the breaker on the outside trips you know which circuit is having the issue. If the breaker is still tripping it could be an issue with your cord, transfer switch or Inverter converter. I would with the coach unplugged follow your shore cord and inspect the wiring coming into the coach, make sure everything looks in order (no melted wires or rubbing wires). This may have to be looked at by a shop for more in depth testing.
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There is a way to check each breaker.
Check for continuity through the breaker.
Disconnect black wire from the load side of breaker.
No continuity...replace breaker.
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