wyliesdiesels
Well-known member
I guess, also have the 2005 NEC illustrated 3rd edition and it showed the same thing. Figured since it was the illustrated edition and not the actual NEC I would defer to you.
Might also be the thing of the word "if", that is if a subpanel does not have the ground wire coming from the main panel or is far away, that bonding and a new ground will work. Or at least that's how I read it
As Pattenp said, u need a newer code book. 3-wire feeds have NOT been allowed since NEC 2008 code cycle...BTW grounding electrodes and equipment grounding conductors are 2 different animals...
I just got done installing a panel in my new garage which is fed from a 200 amp disconnect at my barn. The local Inspector here in East TN told me to run 4 wire cable from the barn to the garage. He also told me not to install a ground rod at the garage unless "it would help me sleep at night", his exact words. Looking at your diagram it seems like I need to remedy this. I am setting myself up for trouble by not having the ground rods?
Thanks,
WAP
A ground rod is a different animal than an equipment grounding conductor. Both are required at a detached building. Grounding electrodes are for lightning strikes, to reference the voltage to ground, etc.