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Posted by buffalobill on May 15, 2008, 3:02 am
> Ran a three wire #12 AWG (Black, Red, White plus ground) from 20 amp
> DP breaker to a duplex NEMA 230 volt 15 amp outlet above a garage work
> bench, (concrete floor), then extended 115 volts (Black, White and
> ground) from it to two regular duplex 115 volt 15 amp outlets also
> mounted above bench. Purpose of the 230 is that we have a couple of
> 230 volt tools. Purpose of the 115 v. outlets, regular tools and small
> bench mounted grinder.
>
> Thinking best way to GFCI all those outlets would be to have a GFCI
> breaker, BUT; with either of 115 duplex in use there will be unequal
> currents in the two legs of the GFCI breaker. So it will trip????
>
> Is there such a thing as a standard North American 230 volt GFCI
> outlet? And if so would it also protect any 115 outlets downstream of
> it?
>
> Or GFCI the first outlet following the 230 volt so it protects both of
> the 115 volt ones? The 230 volt outlet then being non GFCI protected.
> Or blank it off?
>
> Same thing could occur with what here is called a 'split outlet' (can
> double the capacity and/or allow two heavier appliances, especially
> kitchens, plugged into both halves of same outlet) whereby the tab
> between upper and lower halves of a duplex 115 volt outlet is removed
> and opposite 115 volt legs wired to each half.
>
> BTW; As a separate topic; while we have several GFCI protected outside
> outlets, if necessary to extend power outside from a non GFCI outlet
> inside the house we used a GFCI duplex outlet that is of a type that
> does not provided downstream protection to other outlets and mounted
> it on end of a substantial extension.
>
> Comments welcome. TIA
buffalo ny: i'm not an electrician, but as you keep your left hand in
your pocket safely, then write a check to pay an electrician and hand
it to him with with your right hand, he will probably notice you are
overfeeding the very first described 15A device with its panel 20A
breaker and its 20 amp wire. so turn that off now. the rest needs a
closer look for further errors. remember also your city and country
electrical codes will ultimately determine the correct answer. just
because we've got the electricity working doesn't mean it will work
safely under load.
must read:
http://en.wikipedia.org/wiki/National_Electrical_Code
and good basic stuff please read also:
http://www.faqs.org/faqs/electrical-wiring/part1/
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