I want to put a different receptacle from a 4 prong generator (4 wires) to an rv 30 amp 3 prong. 120 volts for rv. How do I connect the 4 wires to the 3 prongs. :roll:
We have lots of gensets. Any one I ever saw with 4 wires was more than 120 v
if your rv is 120 you should have a hot leg, a neutral and a ground
first thing is to get a multimeter and check output of the genset
an electrician holding it is a good idea as well if you aren't comfortable Once the
smoke comes out it's really tough to get back in. I have an employee who put 240 volts across
the 120 leg during an icestorm outage and smoked his freezer tv and all his lights
jim
Figure out what type of receptacle you currently have on the generator and what kind of plug you have on the RV. 4 prong or 3 prong isn't enough information.
Speaking generally, it's never a bad idea to find a friendly local professional that can lay eyes on your contraption and offer guidance for few bucks. I'm not a professional electrician, or a professional anything, but I've seen enough botched wiring jobs to know that you shouldn't trust anything. That wire that looks white at the receptacle might magically turn into a black wire at the other end of the conduit. And it might be hot all the time.
I'm just getting past someone joining SC.org.. and then making a first post about wiring a genny ! As noted a 4 prong plug suggests 240 Volts + a neutral + a ground. You can grab 120v from either hot phase + the neutral (and the ground) to convert to 3 prong plug. Just cap the one hot phase.
A 30 amp RV has a three prong plug. One 120V hot, neutral, and ground
A 50 amp RV has a four wire plug. Two 120v legs, a neutral, and ground. The RV does not typically use the 240V available but uses the two 120v legs for a total of 100 amps available.