No need for that MD - Everything in the electrical system is tied together at the breaker panel. (Or should be at any rate)

Actually what MD is talking about was a valid point, I do not know know if it has changed on these newer gens but the older ones had to be on the same circuit.

That's weird because everything in a house is basicly one circuit once you figure all the neutrals are tied together. Perhaps the snag before was it needed to be on the same phase? I need some more info on how this really works...