Grounding Ring Size
Grounding Ring Size
(OP)
Hi, I need your input to understand correctly the way of sizing the grounding ring. Ground Ring not less than 2 AWG Cu per NEC.
I worked in a design of an industrial building with 3,000 A service, the ground ring that encircle the building was spec 4/0 and have not received comments on that. I'm not 100% sure but I guess IEEE recommends either 3/0 or 4/0
I came across some other projects where the ground ring has been sized 500 MCM or 750 MCM, etc. What is the theory behind that? Am I missing something here ?
Thanks for your help
I worked in a design of an industrial building with 3,000 A service, the ground ring that encircle the building was spec 4/0 and have not received comments on that. I'm not 100% sure but I guess IEEE recommends either 3/0 or 4/0
I came across some other projects where the ground ring has been sized 500 MCM or 750 MCM, etc. What is the theory behind that? Am I missing something here ?
Thanks for your help






RE: Grounding Ring Size
Usually conductor size of 2/0 and 4/0 for industrial building application is adequate. However, it is recommended to verify if the conductor will withstand the fault. Check if you project allows the use of Ufer ground (rebar) to supplement the ring bare ground conductor described in your post.
RE: Grounding Ring Size