Using GEC as bonding jumper

Status
Not open for further replies.
Y

yetiman

Member
I am looking at a 400a 480v service . The GEC comes from the electrode(ufer) up into the CT can which then bonds the service raceways(paralleled) and connects to the CT can with a lug and then continues on to the service disconnect and bonds the neutral and equip. grnds in the normal fashion. The GEC is 4/0 cu so the size of the bonding jumper is not a concern. I could not find anything in the NEC that would prohibit using this conductor as a bonding jumper for the supply side as long as it is of sufficient size and attached to the grounded conducter. I have always used the grounded conductor to bond the CT can on the supply side. Anybody see a problem with this install?
 
yetiman said:
and then continues on to the service disconnect and bonds the neutral and equip. grnds in the normal fashion. Anybody see a problem with this install?
Click to expand...
If the GEC only passes through one of the paralled condiuts then you have a violation of 310.4.

(C) Separate Cables or Raceways. Where run in separate cables or raceways, the cables or raceways with conductors shall have the same number of conductors
 
The conductor bonds each service raceway via a bonding bushing and attaches to the CT can on its way to service disconnect.
 
yetiman said:
The conductor bonds each service raceway via a bonding bushing and attaches to the CT can on its way to service disconnect.
Click to expand...

I don't see an issue with that. You mentioned parallel conductors/conduits. If thats the case you would need that 4/0 in both conduits.
 
Status
Not open for further replies.
Top