By computers, you're talking desktop PC's, right? How much current does the copier draw? Unless the copier was right near a limit, I think I'd just put the 3 computers on one circuit and the copier on the other and call it a day.
Not that PQ problems don't happen, but this seems fairly safe. If the copier's current draw is 15 amps or more, their might be a problem. But otherwise, it should be OK.
Radar
There are 10 types of people. Those who know binary, and those who don't.
