I happened to be working on my main amp rack when I saw this. So here is how I do it.
I have 3 quads split evenly among the 2 circuits. Both edisons are 10 gauge. I can run this rack plus FOH, two monitor amps, and backline power from this setup. This is for a typical country bar band, and my bass player runs direct, so there is no bass "rig". Two solid 20 amp circuits do fine. If the power is sketchy I need 3 circuits. I'll put backline and monitors on the other circuit.
These are the main amps. 2 PT2400's and 2 PT1800's. That's 1200 watts x4 channels and 900 watts x4 channels. The amp literature says that a 2400 at full tilt boogie will pull over 50 amps from the wall. In practice it's been just fine running all this on 2 20's.
The biggest problem I have is that these amps are so front heavy, that the sleeve keeps wanting to fall out of the case!