Originally Posted by proggod
Technically it should be wired that way. It should be 4 wires in total, 2 hot, 1 neutral and 1 ground. Your rv plug should not pull the each leg separate for 2 110v legs with the neutral. However if something wanted to pull 220v they would just use the two hots together. Thats why the 50a plugs have 4 wires. I wired my outlets w/ only 3 wires and are now regretting it. Since i can't use the welder and the rv in the same outlet. When I get some time, i'll move them to 4 wire plugs..
Huh? A 30 amp RV receptacle should be 3 wires, not 4. There should be one ground, one neutral and one hot (120 VAC) wire. In fact, there are only 3 connections to be made to a 30 amp RV receptacle. Now, if there are 4 wires in your installation, you could change the 30 amp receptacle to a 50 amp receptacle and use a 50 to 30 amp adapter. That way, when you trade your 30 amp RV in for a larger RV with 50 amp service, you'll be ready. I say this because I originally wired my RV shelter for 30 amps and had to later add a 50 amp circuit when I got my current RV. Plan big!