Big Jerm
Member
- Location
- Columbia, SC USA
I have went out to this fasility for the second time with the same blown fuse, the fuse is before the meter and is the first fuse on the system (three phase 480V ) the line side comes from the 400A disconect or power side of the mall in the electrical room which also feeds a number of other stores all 100A .
The load side feeds two 100 amp fused disconects in the store and the two 100A panels ,there are 277/480v circuits in each panel (ac etc) then each panel feeds a step down trans and feeds 40A breaker which feeds a panel of 120/208V circuits.
My question is why is the problem by-passing the other fuses in the store and how can I track this down without hours of opening ever electrical device for loose connections and faulty wires?
The load side feeds two 100 amp fused disconects in the store and the two 100A panels ,there are 277/480v circuits in each panel (ac etc) then each panel feeds a step down trans and feeds 40A breaker which feeds a panel of 120/208V circuits.
My question is why is the problem by-passing the other fuses in the store and how can I track this down without hours of opening ever electrical device for loose connections and faulty wires?