Had trouble with main and A/C breakers tripping. Also microwave breaker. Removed dual breakers, and installed separate breaker for each. Problem solved. No more tripping breakers, even with the A/C, water heater and microwave on at the same time. One more hint. If you have a 30amp camper, use adapter, and connect to the 50 amp. Sometimes RV park breakers are weak, and trip easily.