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Posted by Pete C. on August 4, 2006, 11:05 pm
zxcvbob wrote:
>
> Pete C. wrote:
> > tim@wetfoot.net wrote:
> >> Hi I have NM Romex 12/2 with ground currently running from my panel to
> >> a wellhouse and it's setup for 110 which is running one outlet for a
> >> light and the well pump. I need to install a new pump but it requires
> >> 220v. Assuming I convert my breaker to 220, can I use the existing
> >> 12/2 romex for the new outlet in the wellhouse or do I need to run
> >> additional wiring?
> >>
> >> cheers,
> >> bigballer
> >
> > You can use the existing 12/2, but you'll have to dump the outlet /
> > light since you won't have a valid neutral, just two hots (marking the
> > white wire with red tape as the other hot) and a ground. You could
> > potentially use a 220V light, such a commercial fluorescent or HID unit.
> >
> > Pete C.
>
> He could also use a transformer to derive enough 110V for a lightbulb.
Certainly.
>
> Or, a two-lamp fixture could be rewired in series; the white wire from
> each lampholder tied together would float, so the two bulbs would need
> to be the same wattage. (UL might not approve of this.)
Pretty sure they wouldn't like it since it would leave a 240v
differential across a single socket with the bulb out if the power was
left on when changing bulbs like many people do.
>
> Putting a 220V ballast in a fluorescent shop light might be the best option.
Right or a nice little HID fixture like one of the 70 watt HPS.
Pete C.
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