Electrical – add an additional outlet using an existing outlet that has no ground wire

electricalreceptacle

I am looking to add new receptacles (15A) behind my TV by running a 12/2 romex (20A circuit/breaker) from a nearby existing receptacles (15A). The problem is, the existing receptacle has no ground wire. House is old (1960s), I see the that the receptacle is grounded to the metal box (tested this by running a voltage meter touching the hot prong and the metal box).

After doing some research, I came across the possible solution of just getting 15A GCFI receptacles (over buying 2 prong receptacles) for the new outlet and only connecting the hot and neutral wires. This seems to be the "relatively safest" method without rewiring from the breaker.

Is this the best and easy option? Or are better ones out there (again, without having to rewire from the breaker)?

All suggestions are welcomed! thank you for your guys/gals time!
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Best Answer

There are ground wires there, they're just buried in the back

In your photos, I can see some bare copper wires in the back of the box. These are the ground wires you are looking for, and you'll need to get them pulled out as far as they can go, then nut them to a box grounding pigtail screwed to the box and to another pigtail that goes off to the receptacle.

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