I am an estimator for a light commercial / residential GC here in Flagstaff, AZ. I am assembling an estimate for a Garage /Shop for an existing client and he requested (18) quad receptacles but he only wants (2) circuits. This just does not sound acceptable to me. I reviewed the IRC and found several supporting codes, but nothing concrete. Can you help me out? If he insists, I feel I should include a disclaimer to protect our company in case his kid plugs in 15 space heaters while he is out of town one weekend.