"What you are suggesting is, first of all, senseless, since 240V
circuits do not have a neutral.
Second, what you are suggesting is dangerous because if you connect
these two circuits in the described manner, the circuits will no
longer be safe to work on if only one circuit breaker is turned off
(if a device is plugged into the 240V outlet and turned on). "
I think this is a classic. The OP didn't even know that he already has
240V at the electric panel, or who to call to get the 240V outlet
installed. Then along comes PaPaPeng, telling the guy how to do it
himself. And by what's he's told him to do so far, eg, unhook two
seperate 120V outlets on different legs and run that to the 240V
outlet, it's pretty clear that he doesn't know what the hell he's even
talking about. Following he's advice, someone could easily wind up