Hi everyone
Thanks for the info.I believe I understand the housing question I asked but i am still a little confused on the second question. Let me give more detail. On this camp we are running on 4-500kw catepillar generators. These generators are all syncronized on the same sine wave and have one common power distribution unit, from which this entire camp is fed. It is at this power distribution unit that neutral and ground are tied together . It is very hard to get five conductor cable here because it is never used on three phase systems, and running pipe is out of the question (doesnt exsist) dont ask me why. I want to put a new distribution panel about 600 feet or so from the main power distribution unit, and my local emloyees have run a four conductor cable the full 600 feet , installed the new distribution and hooked up the 3 phases and the neutral. Now in that new distribution panel they have run a 20 -30 foot piece of ground wire to a suitable location and hokeed it up to 3 -10 foot ground rods. The size of the cable and grounding is good!! They did not run the ground all the way back to the power distribution unit. In this new distribution panel they have seperated the neutral and ground. Now if there is a ground fault it does not go all the way back 200 meters to the main P.D.U. which in my eyes seems acceptable, but if there is a problem between the phase and neutral at the new distribution, the fault would have to go to earth at the P.D.U. If I tied neutral to ground at the new distribution panel is this acceptable, . Are there any safety concerns?Does this make sense to anyone? I believe for them it is a cost saving of copper. Would I be better off running a seperate ground 600 feet back to the main P.D.U.?
Thanks for your help
Always learning or not!
Greg Smith
Camp Black Bear
Bosnia
