I happened to stumble on this in the girlfriends apartment building(s). The " 550" and " 575" amp fuses are in the main disconnect of two of the buildings, the " 380" amp fuses are in a third building which actually has TWO main services, one for the units, one (225 amp main breaker) for the house load and now disconnected electric hot water tanks. ( all had electric hot water at one time, only the other buildings brought in a 100A gooV 3 phase service for the tanks, all of which is now disconnected..
I found a couple good violations that I will post later
Just an off the wall question but do you think they used this type of conductor because it basically runs unfused from the service head ( between the 2nd and 3rd floors) down to the sub basement where the disconnect is located... I assume they would have to have buried it in the masonry and concrete slab for protection?!?! Doesnt seem correct, but thats how it was done 40+ odd years ago.
Very cool! I will be definately looking up more information on pyro cables. That is the first time I have actually seen it installed and in service. Too bad its not too popular here any more, I would have really liked to get lessons on how to properly install pyro and get some hands on experience installing the stuff.
It looks like the lock nuts on the MI connectors are ferrous. That could be a problem. It apprears that the 3 MI connectors enter the enclosure via some type of plate that is bolted to the inside of the enclosure. I assume that is nonferrous to pevent induction heating. Don