Old 2 wire romex to new 3 wire?


Old 03-01-17, 09:36 AM
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Old 2 wire romex to new 3 wire?

I have an opportunity to add an outlet to a hallway, which currently doesn't have any, very easily. A bedroom off the hallway has the walls down (remodeling) and I could run a new outlet off an existing one.

The problem is that the old outlet is fed by old 2 wire (black/white) romex. I know I can't just splice new 2 wire (w/ ground) cable to the old, but can I if I install a GFCI outlet and run the new outlet off the load side?

This forum has been a lifesaver during this current project so thanks in advance!
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Old 03-01-17, 11:18 AM
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Unfortunately the electrical code does not permit extending or adding to circuits that do not meet current code, so if you want to add a receptacle you will have to run a new line back to your service panel, or to another circuit that meets current code, if you have any.
Old 03-01-17, 11:27 AM
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Isn't adding a GFCI a way to get 2 wire cable, with no ground, up to code? It just seems like anything on the load side would now be code. Thanks.

Last edited by ElBigDog; 03-01-17 at 12:02 PM.
Old 03-01-17, 01:26 PM
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No, adding GFCI protection is only permitted for installation of three-prong receptacles on grandfathered ungrounded circuits which originally had 2-prong receptacles. It does not bring the old circuit up to code for any other purpose.

There are no legal ways to extend an ungrounded circuit, and in most areas once you take down the drywall in a room the circuits completely lose their grandfathered status. I would suggest the proper fix is to replace all of the exposed ungrounded wiring with a new grounded, AFCI-protected circuit which can power the bedroom, the hallway and a hardwired smoke detector.

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