Will the following wiring diagram work? This 240v single phase NEMA L14-30R receptacle is right off the main panel with a 30amp breaker. I want to obtain both 120v single phase and 240v three phase off of this receptacle using 2 separate circuits in which only ONE of the TWO will be used at a time.
The first circuit having a NEMA L14-30P plug will utilize both hot wires and a ground wire, leaving the neutral not connected. It will feed into a VFD (assuming already sized for the application) which will provide 240v three phase.
The second circuit again having a NEMA L14-30P plug will utilize only 1 hot wire, a ground, and neutral leaving the 2nd hot wire not connected. It will then be connected to a 20 amp breaker. From the breaker, it will be connected to a 120v single phase receptacle.
Assuming all wired connections are made properly at both the receptacle & main panel, all wire is the correct guage, and that the VFD & 20amp breaker are in a proper NEMA electric box, will this set up work safely?
I'm sure many will think this is an odd set up (because it is) but I want to have the 240v single phase receptacle as my starting point instead of the main panel. Again, please note the assumptions made.
Thanks for looking at this thread but I would only like answers to my question leaving out the personal comments of why you guys would never do something like this even though it may work.