Originally Posted by Fattman-Litlboy
Maybe I'm missing something here, but plugging into a 50A connection (that has two 50A legs) at the post with an adapter, will provide power from only one leg of the power. That one leg is 50A, so you will be overloading the 30A cable. I wouldn't do it Ever!
Not if your RV has a 30 amp breaker at the breaker panel end of the shore cord. You will not be able to draw more the 30 amps.
If you short out the cord before the 30 amp breaker, yes the cord could overload.
Think of it this way. When you plug your lamp into a 20 amp outlet at home, that lamp cord will not handle 20 amps, but it doesn't need to, unless you remove the bulb, screw in an adaptor and plug in a toster oven.