I looked at a large Motor Home a customer wants power to. It has a 6-3 w/grd 50a 240v cord on it. I checked the continuity from neutral to ground and no connection. He said he plugs it in to a camp ground with a 3 prong adaptor and it works (2 prong with ground). How would this work if there is no connection to neutral at the motor home panel. And the adaptor has no connection between nuetral to ground on the plug itself. Is there something different about how a motor home is wired?
The Golden Rule - "The man with the gold makes the rule"
The 3-wire to 4- wire adapter plugs into a 125 volt 3-wire receptacle. It connects L1 and L2 of the motor home together so all 120 volt electrical items will function but you will be limited on how many items that can be used at the same time.
Another thought: The motor home has a 4 prong 240v 50a cord & plug. Without the adaptor, someone could could plug that into a 240v outlet and smoke the MH.
The Golden Rule - "The man with the gold makes the rule"