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Home Repair - - If it ain't broken, don't fix it. Otherwise look here.
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Posted by on August 16, 2005, 11:24 am
"Did you run a new wire for this 120 V that you wanted? or are you
grounding
out one of the 240V sides?"
He doesn't have to run a new wire. A 240V spa is run with two hots, a
neutral, and a ground. The heater runs on 240V, the pump can be either
240 or 120, and the blower, lights, etc run on 120V.
I would try just hooking up a test lamp without the spa connected to
one leg of the 240V and the neutral. See if that trips the breaker,
which should be GFCI. If it doesn't, then you know the problem is
somewhere in the spa.
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Posted by Zoner on August 16, 2005, 11:56 am
I guess I need to know how a GFCI breaker works with 240V...
I believe with a 120V circuit, if the amount of current on the hot wire
does not equal the current on the neutral wire, the breaker will trip.
The theory being the current is going somewhere unwanted, like through
your heart...
However, with a 240V circuit, with 2 hots and a neutral, how does this
work? It would seem my breaker is tripping if there is any current
difference between the two hots, in which case using 120V is not
allowed.
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Posted by on August 16, 2005, 1:59 pm
"I believe with a 120V circuit, if the amount of current on the hot
wire
does not equal the current on the neutral wire, the breaker will trip.
The theory being the current is going somewhere unwanted, like through
your heart...
However, with a 240V circuit, with 2 hots and a neutral, how does this
work? It would seem my breaker is tripping if there is any current
difference between the two hots, in which case using 120V is not
allowed. "
I believe with a 240V GFCI, at any point in time, what goes out on one
240V leg must equal what comes back on the other plus neutral. If any
current goes somewhere else, eg through you to ground, it trips.
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Posted by Rick on August 16, 2005, 8:45 pm
> I guess I need to know how a GFCI breaker works with 240V...
>
> I believe with a 120V circuit, if the amount of current on the hot
wire
> does not equal the current on the neutral wire, the breaker will
trip.
> The theory being the current is going somewhere unwanted, like
through
> your heart...
>
> However, with a 240V circuit, with 2 hots and a neutral, how does
this
> work? It would seem my breaker is tripping if there is any current
> difference between the two hots, in which case using 120V is not
> allowed.
Visit the web site of the GFCI breaker manufacturer-they will have the
wiring diagrams for the all possible configurations......
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Posted by HotRod on August 16, 2005, 3:41 pm
OK why don't you grab an extension cord and run that to the hot tub and wire
in the 120 V bulb etc off of that, if the breaker resets you have a bad wire
somewhere if not your problem is in the 240 V, are you sure your using
(Red/White) or (Black/White)? I'd try the extension cord first.
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Page 3 of 3 << first < 1 2 3
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