I carry several T-bone adapters, available at most RV parts stores. 50Amp male to 30 Female, then a 30 amp male to a 20 amp female and since I only have a 30 amp cord on my Lance TC, I have a 20 amp male to 30 amp female one also. These cover all the situations I run into, so far. I find some of the rural private campgrounds I like in Canada only have 20 amps as some are running their own generators for power at the roadhouse, etc.
If I plug my 30 amp power cord into a 50 amp plug in, using one of the adapters, if I overload it, it just pops my main 30 amp breaker and so I am protected. A 20 amp main cord would do the same if you have a 20 amp main breaker on your TC. I run my AC, a 13.5K BTU unit on a house 20 amp circuit without problems, but that is a full load other than a few lights supplied by the inverter/charger.
