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#81253 - 07/29/02 04:45 PM Main G.E.C used also as an E.G.C
cthusky Offline
Junior Member

Registered: 02/12/02
Posts: 6
Loc: South Windham Ct, USA
Senerio: Contractor does a 100 amp to 200 amp service upgrade to a single family home. The meter, and 100 amp panel, were located in the basement. The new meter is now located outside of the garage,and a new 200 amp panel is located on the inside wall of the garage. The old panel was left in the basement as a subpanel. The contractor fed the old panel with pvc from the new 200 amp panel. In the pvc are the two ungrounged legs, the neutral,and the main grounding electrode/equipment grounding conductor(one wire which hits a lug on the ground bar{neutral is isolated} then proceeds through the panel to the water meter located a couple feet away).Here's my question. Can the main g.e.c also be used as a e.g.c? I know system grounding is different then equipment grounding, but besides by definition is there an applicible article in the code I can refer to?

2014 / 2011 NEC & Related Books and Study Guides
#81254 - 07/30/02 03:16 AM Re: Main G.E.C used also as an E.G.C
sparky Offline

Registered: 10/18/00
Posts: 5545
if in fact, this is a detatched garage, then both structures would require a GEC, and GE's, and the conductor you mention bettween panels would merely be the EGC.

#81255 - 07/30/02 04:32 PM Re: Main G.E.C used also as an E.G.C
cthusky Offline
Junior Member

Registered: 02/12/02
Posts: 6
Loc: South Windham Ct, USA
Sparky, no this is an attached garage.

#81256 - 07/30/02 10:08 PM Re: Main G.E.C used also as an E.G.C
Steve T Offline

Registered: 02/14/01
Posts: 312
Loc: Oak Park, IL, USA
I don't believe anything in the NEC says this can't be done. Just have to make sure you are not setting up parallel neutral paths with incorrect bonding in the sub panel.

#81257 - 08/01/02 02:25 PM Re: Main G.E.C used also as an E.G.C
resqcapt19 Offline

Registered: 11/10/00
Posts: 2209
Loc: IL
As long as the grounding electrode conductor is continuous and the grounded conductor is not bonded to the grounding conductor, I see no problem with the installation.


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