Upgrading non-grounded bathroom receptacle


Old 02-06-16, 04:25 PM
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Upgrading non-grounded bathroom receptacle

Does upgrading a non-grounded 2 prong bathroom receptacle require new wiring to be run?
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Old 02-06-16, 04:33 PM
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If metal conduit was used you probably have a good ground but if old style Bx cable without a bond strip was used your ground is at best questionable. If it is K&T or NM cable without ground you do not have a ground. You can install a GFCI even though there is no ground. It increases personal safety and is code compliant for a grandfathered circuit but does not provide a ground.
Old 02-06-16, 04:37 PM
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You can't install a new three wire receptacle to a circuit with only two wires unless it is so noted on the cover plate that there is no ground. NOW, since it is in a bathroom, you could essentially wire the GFCI in (which is required). They don't necessarily need a ground to operate, since the work off the differential of current between the hot and neutral to trip and protect personnel. You would still need to use one of the stickers that come with the GFCI that indicate there is no ground, however.

Upgrading will require new wiring, but replacement of the receptacle will not. Bathrooms are required to be on their own 20 amp circuit and use 12 gauge wiring. If either of these criteria is not met, then you will need to bite the bullet and rewire it completely.

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