Continous Ground Electrode Conductor

[millstrainer]

The code requires the grounding electrode conductor (GEC) to be continuous without splices, except for irreversible ones. Where is this grounding electrode conductor starting at on a separately derived system? Does it have to be continuous from the X0 lug, a ground bus, or the case ground? We install a single point ground bus in our transformers and everything (jumper from X0, equipment grounds, grounding electrode conductor, etc)is connected to it in set screw type lugs. Is this type of installation acceptable since the GEC has a break in it (at the grounding bus) between the grounding electrode and the X0 lug.

 

[earlydean]

Re: Continous Ground Electrode Conductor

The GEC must be continuous from the grounding bus to the grounding electrode.

 

[dereckbc]

Re: Continous Ground Electrode Conductor

Originally posted by earlydean:
The GEC must be continuous from the grounding bus to the grounding electrode.

Not exactly. It can be spliced using irreversible compression-type connectors listed for the purpose or by exothermic weld per 250.64(C).

For SDS systems a common GEC can be used and spliced per 250.30(A)(3). IMO the GEC must terminate to the Xo or neutral bus at the first disconnect device, rather than your GB. Otherwise your installation meets requirements.

[ November 20, 2003, 06:23 PM: Message edited by: dereckbc ]