Hi everyone, I'm taking delivery of our new 5th wheel on Saturday, and it will be my first time owning a 50A camper. I do a lot of tailgating where I'm hooked up to my Honda 2000 generator, and...
The reason most RV have 50A power is typically because they have 2 AC units. At best, with 30A you will be able to run one of them.
I can't say I have seen one, but an RV with 50A service MIGHT have a 240V water heater.
While it might not meet NEC "code", connecting both legs of a 50A load (your RV) to one leg of a 30A supply should not cause any harm or danger. 240V appliances will not work, but will not be harmed. If you exceed the 30A supply, it will trip its breaker.