Originally Posted by ratherberv
I mean if you are saying not to use three prong with 50a, I agree 100%. The neutral and ground should be separated for safety at the very least. But is there another reason you say that? Inquiring minds want to know.
First off, you can't use a 50 amp 125 volt cord on an RV. The ends dont match. Its a 3 wire cord, like a bigger 30 amp. 120 volt only. It came about while boats were using more power then 30 amps but before they went to 50 amp 120/240 volt service a few years later.
50 amp 120/240 volts is 4 wires, 2 hot 1 neutral and a 1 ground.