greenspark1
Senior Member
- Location
- New England
Hi all. I have an interesting situation where I’m pulling two feeders to a new building, one normal and one UPS/emergency power. Per NEC 250.32 feeders to a separate building need a new ground electrode installed. So I will install two rods per feeder and bond to each incoming EGC. But then I need to bond together the ground rods, cold water piping, bldg steel, and foundation to form a grounding electrode system. Which ultimately means that the normal and UPS feeders will have their equipment grounds connected through the new building steel, water pipe/etc. It seems a bit odd to have this parallel path for ground fault current and is not something I’ve run into before. Of course neither system will have the neutral-ground bond at the separate building.
I don’t see any way to keep the new feeder grounding electrodes separate while still meeting 250.32. Anyone have a good solution/explanation?
I don’t see any way to keep the new feeder grounding electrodes separate while still meeting 250.32. Anyone have a good solution/explanation?