Originally Posted by ajm163
1. you could trip your inline gfci because current is being returned on the ground line.
2. you will put current onto the buildings ground line which could be really bad (could end up giving some a pretty good shock)
A 2nd option (provided you really need the 120v in one connector), would be to make a bastard child adapter box where you'd have your mating connector spliced out to two separate plugs: #1) the 6-50 for both both ends of the 240 and ground, #2) a standard 120v plug where you just snag the neutral line and ground as well. Common the grounds inside the box for the additional safety factor. And finally - don't ever tell an electrician that I said this was 'ok' - but yes, it will work.