iwire,
You are right about not using a single phase panel. A 3 phase panel will be used. Here is what I see when I go there. A transfomer that has the meter and a lock that has the power company name on it. A main panel that has 3 (not 4, I looked back at my notes) 100 amp breakers on it. The owners showed me 3 sub-panels inside the building. What useful info. can I get from the POCO? According to UGLY's a 3 phase 75kva transformer is capable of producing 180 amps per leg. Even though each leg has to be protected by overload protection at that amount, does that mean the transformer is capable of producing 540 amps overall?