Disclaimer: While I have two degrees in engineering
and have done electrical work in both an industrial
and homeowner setting, I am not a licensed electrician
nor completely familiar with all national and local
electrical codes. In summary: If you kill yourself
or burn down your house, it ain't my fault.
I'm assuming you're in the USA with normal household
electrical service.
Anyhow, a 230 volt circuit is actually a split phase
circuit with two wires that each have a potential to
ground of 115V, with a 230V potential between them.
Therefore you will not have 230V to ground anywhere in
the circuit. If you do, you should probably call a
qualified electrician right away. ;)
In short: You've got the right answer. Jumper the
ground wire from the switch to the outlet.
-Steve
--- Chuck Norcutt <chucknorcutt@xxxxxxxxxxx> wrote:
> Sometime after I moved into this house I noticed
> that the wiring of the
> air conditioner's air handler unit in the basement
> had not been
> completed properly. (probably due to a dispute with
> the builder who was
> going bankrupt and likely paying off the local
> building inspectors)
>
> In any case, the air handler has a 230v line coming
> in inside a conduit
> which runs into a junction box. The 230v stuff
> arrives at an on/off
> switch whose outputs continue into the air handler
> to run the motor but
> also divide off 115v into a single socket outlet to
> operate a small
> condensate pump (since there is no floor drain).
>
> The junction box used appears to be a ceiling box
> with no cover and the
> switch and outlet were just dangling on their wires
> half in and half out
> of the box. I finally resolved to fix this problem
> and went to Home
> Depot where I procured a double device cover for the
> junction box, a
> combination switch & double outlet cover plate and a
> double socket
> outlet to replace the single one and be compatible
> with the cover plate.
>
> While trying to poke everything back into place I
> noticed that the 115v
> socket had no ground wire. The ground wire ends at
> the on/off switch
> and is not jumpered to the 115v socket. The on/off
> switch, of course is
> carrying 230v. I assume that I should simply run a
> jumper wire between
> the ground screws of the switch and the socket but
> it bothers me that
> I'll have a common ground between 230v on one side
> and 115v on the
> other. I have assumed the jumper is the correct
> solution since I can't
> imagine any other. But alternating current has
> always been a near total
> mystery to me and thought I'd ask before committing
> any serious
> electrical sins.
>
> Chuck Norcutt
>
>
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