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Old 12-09-2010, 04:10 PM   #1
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70's house missing grounds in half house


The house was built in the 1970's and the original part only has 2 wire romex, hot/neut no ground, the additon is grounded, the service panel was upgraded in the early 2000's to a brand new Square D one... well we want to get all the outlets grounded, and electrician said just put GFCI's on the outlets and that solves the grounding problem... thought ok, that would detect a short to ground, but what about electronics that want a ground to remove noise from their circuits? or for what ever reason they "must be grounded" for... how would GFCI's fix this problem? there wouldn't be a ground still that is a true ground...

what would you suggest be done? put GFCI breakers in for all the branches that are not grounded, or have the lines redone to be grounded?

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Old 12-09-2010, 05:07 PM   #2
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70's house missing grounds in half house


GFCIs do not add a ground. They do provide protection for you even when a ground is missing, so you are safe to use equipment that is grounded through the receptacle but it doesn't provide a ground for the equipment itself. That means that the equipment could still be damaged or malfunction. When installing a GFCI receptacle, you should put a label that says, "NO EQUIPMENT GROUND" near it.

I would recommend rewiring if your budget can handle it. You could conceivably go with GFCI for now and get the new wiring later. At least you would already have the upgraded receptacles in place, and a GFCI outlet is fine anywhere except on refrigerators, big motors, or medical equipment.

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Old 12-09-2010, 05:20 PM   #3
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70's house missing grounds in half house


The addition of GFI protection will allow 2 prong receptacles to be replaced with 3 prong devices. This will not add a ground. To add a ground you would either need to rewire or run a separate grounding conductor from the panel to the receptacles.
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Old 12-10-2010, 02:31 PM   #4
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70's house missing grounds in half house


Quote:
Originally Posted by Jim Port View Post
The addition of GFI protection will allow 2 prong receptacles to be replaced with 3 prong devices. This will not add a ground. To add a ground you would either need to rewire or run a separate grounding conductor from the panel to the receptacles.
All the outlets where 3 prong in the house, but for some reason when wired they cut off the ground wire..... figure that one out
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