One more item that some people are not aware of: Motorhomes use Underwriters Listed (UL) residential circuit breakers, these are only rated for continuous duty at 80% of the handle rating (Amps). That means your 30A breaker may trip at anything over 24A and still be performing as designed. This varies depending on the temperature at the breaker location; a breaker will hold its rating at 30 degrees Centigrade, but the hotter the temperature, the shorter time before tripping.
George Schweikle Lexington, KY
1999 Safari TREK 2830, FMCA 190830, Safari International chapter
1995 Safari TREK 2630, 1983 Winnebago Chieftain, 1976 Midas Mini