replacing old non-grounded (2 prong) electric receptacles

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Whoever told you this is NOT an electrician....... Don't do it !!!!
If your home is really 50 years old, then it was built in the early 1950's. It should have BX cable in the walls, and most likely EMT conduit (metal pipe) in the basement. That was more or less the standard back then, unless it is rural, in which case the old cloth romex was common. If cloth romex, there is no ground. But if it's BX and EMT, you most likely got a decent ground to each box.
Try to install the self grounding outlets if you dont know how to install a ground screw and green wire to each outlet, and many of the older boxes did not have a threaded hole in their back.
Otherwise, go to Walmart and they most likely carry the non-grounded outlets for less than $1.
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On 5 Aug 2003 04:27:24 -0700, snipped-for-privacy@htn.net (David Jensen) wrote:

Don't make a bootleg ground. All you need to do is wire a GFCI to the first outlet of the circuit, if it is linear wired (outlet box to outlet box). If it is octupus wired (the outlet box wires lead to an ar joined in the ceiling), you should rewire the circuit feed into an outlet box (with the GFCI outlet in there), with a new wire to the fusebox, if you don't have a breaker panel you can replace the normal breakers with GFCI one. GFCIs only provide personal safety, they don't provide an earth ground that some electronics need.
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