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- Newsgroups: misc.consumers.house
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!sdd.hp.com!think.com!paperboy.osf.org!spinner.osf.org!drand
- From: drand@spinner.osf.org (Douglas S. Rand)
- Subject: Re: Providing ground (not an FAQ)
- Message-ID: <1992Nov17.190530.4039@osf.org>
- Sender: news@osf.org (USENET News System)
- Organization: Open Software Foundation
- References: <BxvEL9.IF1@access.digex.com>
- Distribution: na
- Date: Tue, 17 Nov 1992 19:05:30 GMT
- Lines: 47
-
- In article <BxvEL9.IF1@access.digex.com>, nbull@access.digex.com (Nicholas Bull) writes:
- |> ...
- |> I want to make a 2-prong ungrounded outlet into a 3-prong
- |> grounded outlet (to connect a surge-suppressed computer to). On
- |> the other side of the wall, a few feet higher and to the left, is
- |> a properly grounded 3-prong outlet. Can I do either of the
- |> following?
- |>
- |> 1) (Preferably), drill a hole through the wall, and extend the
- |> ground wire from the existing 3-prong grounded outlet, probably
- |> using a conduit to take it to the presently-ungrounded 2-prong,
- |> which would then be converted to a (hopefully) properly grounded
- |> 3-prong; or
-
- Don't know. I'm a little uncomfortable on this, but I don't have
- the NEC at work and I can't check it. The usual options for retrofit
- are to run a separate ground back to the panel, or to a cold water
- pipe that is continuous, excepting jumpered unions, back to the water
- main (this is grounded at entry and is often metal and self grounded).
-
- |> 2) do the same but extend all three wires from the existing
- |> 3-prong grounded outlet to the ungrounded 2-prong, disconnecting
- |> it from the old wiring (I hope it's at the end of the circuit,
- |> not the middle or beginning).
-
- I like this better. It should be OK if there is a basement
- below and you can pull the old wires down into the basement.
- Remember that you'll have to terminate the old
- wires properly.
-
- If the box is not at the end of a run, and you can't pull
- the wires down to the basement, then it will probably not
- meet code with the extra current carrying conductors in the
- single work box.
-
- |> Thanks for your wisdom on this. (Another alternative is to
- |> somehow run a ground wire from the cold-water pipe in the
- |> bathroom across the hall--maybe through the attic?)
-
- As above, I think this is reasonable, but the ground must be
- continuous back to the water main.
-
- --
- Douglas S. Rand <drand@osf.org> OSF/Motif Dev.
- Snail: 11 Cambridge Center, Cambridge, MA 02142
- Disclaimer: I don't know if OSF agrees with me... let's vote on it.
- Amateur Radio: KC1KJ
-