Adding Grounding To Old House Wiring

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Old 11-27-10, 08:44 AM
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Adding Grounding To Old House Wiring

I have an 85 year old house with some old and some new wiring. The new wiring was poorly done (12-2 w/ground that the ground enters the main box, but was never connected). I can correct that easily enough, but my question is about the old wiring. Can I add a ground to a circuit by adding a ground wire to an outlet box and running it directly to the ground (dirt) outside the house at that point. I know it will make my outlet tester show the outlet is properly hooked up, but is this kosher?
 
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Old 11-27-10, 08:51 AM
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No, earth grounding and equipment safety grounding are quite different. You can run an individual bare or green ground wire from ungrounded receptacles back to the ground bar in your main panel. This is a legal solution provided in the electrical code for retrofitting old homes. An alternate solution is to provide GFCI protection on the ungrounded circuits which increases the safety substantially but does not actually provide a ground for equipment.
 
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