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.
Re: Oddball Fuses#124180 08/22/0606:32 AM08/22/0606:32 AM
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