The transformers are spread down the 900' that this parallel bus is run a few hundred feet apart. You can see that it is one continuous run in that picture I posted. I have more pictures. The whole 3 street run, about 4000 feet comes from one primary leg with 18 transformers ranging from 25 to 50 KVA and feeds about 40 houses. The only place that has this bus scheme is the part near my house. I looked at the 1970 aerial photos and this is exactly where the only 5 houses on the street were. I bet it was all fed with one transformer in 1970. Those houses had old split bus panels, 60 or 100a then, at least one still does.
