How do I wire multiple AC boxes off the same circuit.

I have One quad box on a very large wall and would like to add another two quad boxes off the same circuit. What's the wiring scheme for this? thanks in advance!

Are you doing star grounding? or sharing the same ground? :D

I'm not sure as the room has been already wired. my guess is that its a shared ground.

Basically the same as the star grounding diagram here: http://johnlsayers.com/phpBB2/viewtopic.php?t=2206 If you're not doing the star ground, basically the ground will be done similar to the hot and cold legs. If you're running that many circuits, I would use nothing smaller than 12 AWG wire, but your first run, you may want to run 10 AWG.