JRumsey
Member
- Location
- Beaumont, Texas, USA
We are manufacturing a 4000A/480V distribution switchgear and installing it in a Power Distribution Center (PDC - electrical house). The switchgear has an incoming 4000A breaker from a plant transformer (not utility) and several 1600A feeder breakers going to 480V MCC lineups also in the building. The switchgear has a 1/4"x2" copper ground bus bar. We are connecting the Switchgear ground bus bar to the building ground bus ring (1/4"x2" copper bus run around the inside perimeter of the building). The building ground bus ring is then connected to the system grounding electrode (ground grid).
My questions concern which table to use for
1.) The conductor from the Switchgear ground bus bar to the building ground bus bar ring.
2.) The conductor from the building ground bus bar ring to the system grounding electrode(s).
3.) The conductor from the MCC ground bus bar to the building ground bus bar ring.
My questions concern which table to use for
1.) The conductor from the Switchgear ground bus bar to the building ground bus bar ring.
2.) The conductor from the building ground bus bar ring to the system grounding electrode(s).
3.) The conductor from the MCC ground bus bar to the building ground bus bar ring.