cohosilver
Member
I have a question going on here that I could use some input on. If there is a generator with a 1200A MDP and there are (3) 4x500mcm ER-TC cables to a 120OA MDP and there is an MBJ at the MDP, what size GEC do I need for the generator and for the MDP when the only grounding electrodes available are ground rods?
It has always been my contention that the GEC to ground rods, when the GEC is only going to the ground rods is 6 AWG. Everywhere I looked, specifically under 250.30, I was refered back to 250.66 and I do not see where 250.66(A) would not apply.
The only available electrodes will be ground rods, it is in the middle of the desert.
It has always been my contention that the GEC to ground rods, when the GEC is only going to the ground rods is 6 AWG. Everywhere I looked, specifically under 250.30, I was refered back to 250.66 and I do not see where 250.66(A) would not apply.
The only available electrodes will be ground rods, it is in the middle of the desert.