If you are tripping the 30 amp main feed in the trailer, or the pedestal breaker; then the problem is possible bad breaker in your trailer or bad breaker in pedestal or old/work socket in pedestal, possibly low voltage, or lose connections anywhere.
If the 20 Amp Air Conditioner breaker is tripping and turning off all circuits in the trailer, there is a problem in the trailer wiring. Two possibilities I can think of:
1.loose connections in the panel box, overheating the breakers and tripping them. DANGEROUS.
2.the main breaker in many 6 breaker boxes in RV's are a two pole block that has a 30 amp and 20 amp breaker. It is supposed to be wired such that the input feed from the campground is tied to the 30 amp side, and the AC tied to the 20 amp side, they could be wired backwards. That makes the 20 amp the main, and the 30 amp feeds the AC. Slightly dangerous.
To test the first possibility, feel the face of the breaker panel to see if its hot. To test the other possibility, shut off the 30 amp breaker, and if the AC turns off, but all else keep running that's the problem.
Regards,
Doug
