3 prong 50 amp plug to 4 prong 50 amp ????

GoneCamping wrote:
Found this thread on a Google search, it pretty much answers my question, though I've got slightly different scenario. First off, I not a novice on electrical wiring, but I'm not licensed and not an electrician either. My scenario is that my Motor Home is a simple 30amp/110v unit. It is equipped with 2 roof air units, and according to the manual can only operate one or the other except under generator power, at which point the system will allow both units to work at the same time.

Now, I will be camping in Cape Hatteras at a place there is no shade, the single unit is unlikely to keep up on a very hot day. So I bought a 50amp plug, and a 3 prong generator style receptacle and some wire. I want to un-plug the coach from the Genset, and plug it into a 50amp cord that I made, but was not 100% sure of whether I needed the ground or not. Since both A/C units are 110v I'll obviously need to have Neutral and the 2 hot wires. I'll just eliminate the ground since there is no ground prong on the coach plug that goes into the Genset. Hopefully this will allow me to run both A/C units at the same time at the campground, guess we'll find out tomorrow afternoon.

Don't even think about it and with all due respect, I don't think you know what you're doing or understand the system at all.
A dual power adapter is the way to go anyway, like has been said, so if you can find someone to accomplish that and maybe even do it yourself with detailed instructions. This will allow you the option of plugging into a separate pedestal circuit for your rear ac and leaving the 30amp main for running the rest of the coach.
I did this and wouldn't even want a 50amp service, even though I am very capable of installing one.
Rather than going into detail for what this would entail, you might want to search out the numerous threads dealing with this conversion, but will tell you now, that it's not an easy task.