ECN Forum Forums Code Related Discussion NEC & other Code issues Additional Ground Rod

I think the code says quite the opposite. No matter what size the switchgear is a #4 is enough.

Lets make the question a little simpler. You have 1200 kcmil SEC. You have a #4 copper as a ufer. You attach 3/0 from the switchgear to start of the ufer. At the other end of the ufer you attach 3/0 and bond to cold water. Is this legal?

I personally think the code allows this by 250.62(F), while I consider it wrong.

Hotline1, I do most of my work in Union County, NJ, and I too would never run #4 on a 200 amp service to the water ground and from there run #6 out to the ground rods. I was just never taught to do it that way. I do understand, though, how everything is bonded together.

iwire, that image paints a very clear picture of the discussion. Thanks.

George:

I would say that if both conductors were put under the same acorn clamp it could not be done. If the second clamp were provided on the ground electrode (rod) Then it would be ok. COde does not limit the number of acorn clamps. It is even shown in the Soars book.