3000a main service

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nickelec

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I'm in the process of putting together pricing for my labor to install a 3000a main service with an MDP that will consist of 20-25 switches , as for the GES is 3/0 copper to the buildings water main and a ground rod sufficient or do I also need a 3/0copper to CEE as well

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250.66 to size the GEC to your metal water pipe. A #4 CU to the CEE would be fine. If you have building steel, you would also need a full sized GEC to that as well.
 
So building steel is usually tied in to the CEE to my understanding? So if I have this right

3/0 to water
#4 to CEE
3/0 to building steel
# 6 to ground rod (optional)

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Yes #3/0 is the largest GEC required, as noted certain electrodes allow smaller maximum sized GEC's. If you have the first three you can definitely skip the ground rods.
 
I'm also pretty sure that the room has to be a certain size and certain size egress I believe if the gears centered in the room 1 doors sufficient

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