If I had a couple dollars for every posting here on RV.net, where a Professional Electrician (plus more than a few RV owners...) looked at that 120V/30A plug or receptacle and thought it just had to be 240V. And destroyed lots of electronic stuff in the RV...
Not code legal, and I took it off when we moved... Had a dedicated 120V/20A circuit to a room A/C we didn't use at the house. Drilled through and put one of those 30A RV/Mobile Home receptacles out there in a box with weatherproof cover. That allowed me to plug our 30A RV shore tie into a receptacle meant to handle more than just a few amps current. We could run our coach at home that way to cool it before a trip. Would handle Converter/Charger, Refrigerator on Electric, and 13500 rooftop A/C. We were burning those little "puck" adapters up, plugging 30A shore tie into "puck" then "puck" into ordinary 20A receptacle.
