Hello all,
I was asked to provide a shunt trip push button on the building exterior instead of a main service switch (knowing that the main distribution panel inside the building has a main breaker). This is asked to save cost since the main service is 3-phase 800A and providing a shunt trip...
I am designing a project at a building that has 120/240V, 3 PHASE, 400A electric service. I called the electric utility company and confirmed that there is (2) pole mounted transformers on the outside pole to provide open delta 3 phase service to the building(it means the neutral is center...
I have a pad mounted transformer rated: 750KVA,3 PHASE, Y-Y, 15.24/26.4KV - 277/480V. The rep. is telling me that i can use a class rating of 25KV,125KV BIL instead of 35,150KV BIL for insulation, but i am still not 100% convinced it is 26.4kv on the primary how can i get away with 25kv rated...
Hello Folks,
I am having a debate between using a supply-side bonding jumper or a grounding rod for my main distribution panel. I have an outdoor 4.16-204KV-208/120V, 75KVA pad mounted transformer feeding an outdoor 3 Phase, 225A main panel mounted on a unistrut to feed sports field lighting...
