On Apr 2, 3:00*pm, Jack Hammer wrote:
On Apr 2, 2:52*pm, "Bob F" wrote:





Dave wrote:
Question for the gurus. *I just tested my housewiring (at the wall
outlet) and found that I have 120V AC between the hot and return,
only I can't tell which of the top two "slots" is hot and which is
return. *They both show 59.4 VAC with referrence to the third (GND) terminal,
on the bottom. Huh? Anyone have any idea what might be going on with my house
wiring? *It's an old house, built in '49 or '50, and has had numerous
pieces added and modified. *I was in the attic once, installing the
wiring for a bathroom outlet, and got bit by the *white* wire, which
should have been my first clue something was wrong. *When I asked
someone else about that though, was told that it might be normal,
depending on what had been put in place. *:/
Any ideas or feedback are welcome. *Hoping someone can explain this.. Also
hoping I don't have to rewire my house...

Floating ground. It is likely that there is no ground wire at the outlet, and
that the origional 2 prong outlet was replaced with a "grounded" outlet, even
though there was no ground wire to connect to the ground connection.

So how do you explain the potential difference between the other 2
wires and ground?

Phantom voltage. if you tested it with an old analog meter, it would
likely show 0V.

easy way to tell, just pull the recep out of the wall, beer of your
choice says that it is wired with 2-wire Romex or some other similar
wiring method, so that there is no ground present.

At least your PO didn't do what mine did, which was to bootleg all the
ground connections to the neutral to fake out the home inspector's
little tester gadget. Unfortunately for me, I know in my heart that
the people that we bought the house from didn't do this (they weren't
that handy) and it was likely the owners before that, so I really
didn't have any recourse. Discovered a lot more shady wiring when I
went up in the attic to "just replace a few ceiling boxes" to allow
the girlie to install ceiling fans. I posted about that here
before...

old houses... love 'em (built like masonry outhouses) but hate 'em
too (previous owners can do horrible stuff)

nate