LarryC: Electricain has to size wire to the NEC. Utility co sizes their wire to expected load. If their wire fails they replace it. Until then they save money.
John: You're right all the lugs had three openings.
Conductor with green tape is a bond and then goes to the ground rod. Although the six screws through the plywood on the grounded phase made an effective bond although unintended. [Linked Image]
Conduits are non-metallic.
If I remember right parallel conductors went to a single panel, located just inside the wall.
Alan--

Alan--
If it was easy, anyone could do it.