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Main G.E.C used also as an E.G.C
#81253
07/29/02 07:45 PM
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Joined: Feb 2002
Posts: 6
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Junior Member
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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?
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Re: Main G.E.C used also as an E.G.C
#81254
07/30/02 06:16 AM
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Joined: Oct 2000
Posts: 5,389
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cthusky, 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.
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Re: Main G.E.C used also as an E.G.C
#81255
07/30/02 07:32 PM
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Joined: Feb 2002
Posts: 6
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Junior Member
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Sparky, no this is an attached garage.
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Re: Main G.E.C used also as an E.G.C
#81256
07/31/02 01:08 AM
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Joined: Feb 2001
Posts: 308
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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.
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Re: Main G.E.C used also as an E.G.C
#81257
08/01/02 05:25 PM
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Joined: Nov 2000
Posts: 2,148
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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. Don
Don(resqcapt19)
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