joshtrevino
Member
- Location
- Beaumont, TX
I am designing a new production facility with several motors operating at 480V, low voltage power panels (120/208V), lighting, structural steel, etc. All electrical equipment cases will be bonded back to the source utilizing properly sized EGC's. The typical way that I have designed the grounding for such a building is a ground ring (2/0 or 4/0) with grounding rods driven and bonded to the ring every 20-30 feet. All building steel, equipment cases, panel cases, etc are then bonded to the ground ring.
I have a contractor asking why we need the grounding ring. His suggestion is to drive rods around the building perimeter with all equipment bonded back to the rods.
I understand that both a ground rod and a ground ring are permissible as grounding electrodes in NEC 250. What, if any, are the benefits of using a ground ring instead of just using driven rods? Does IEEE or othe suggest a best practice for this?
I have a contractor asking why we need the grounding ring. His suggestion is to drive rods around the building perimeter with all equipment bonded back to the rods.
I understand that both a ground rod and a ground ring are permissible as grounding electrodes in NEC 250. What, if any, are the benefits of using a ground ring instead of just using driven rods? Does IEEE or othe suggest a best practice for this?