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'[EE:] GFI as a breaker?'
2002\01\17@171300 by ashly Dearden

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Will a GFI outlet also work as a circuit breaker? in other words, if I put
one on a 20A circuit, and its typical rating is 15A, will it blow if the
device draws more than 15 amps? or just under a ground fault condition?

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2002\01\17@183958 by mooseman

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GFI plugs are not designed to operate as an resettable overcurrent device (at
least i have never seen one that does). theoretically, they could be one-time
overcurrent devices... hehe.

the 15amp rating is usually to do with the CSA or UL or whatever testing
authority who tested it to says it is safe to that point. the risk being is
that loads past 15amps could damage it such that it still provides power to
the appliance connected, but doesn't do the GF part. or it simply gets
destroyed and never provides power out again.

i don't know about the rules where you are but here in canada, 20amp plug ins
are _supposed_ to be different than 15 amp ones. there is a different style
of outlet for the larger circuits.

you may not find a larger GF protector at your local hardware store, but they
are available. they can come in plug/recepticle type or wire inline type.
the wire inline type are more suitable for larger loads.

hope that helps.

moose


On Thursday 17 January 2002 17:11, you wrote:
{Quote hidden}

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2002\01\17@202205 by Robert Rolf

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ashly Dearden wrote:
>
> Will a GFI outlet also work as a circuit breaker? in other words, if I put
> one on a 20A circuit, and its typical rating is 15A, will it blow if the
> device draws more than 15 amps? or just under a ground fault condition?

The depends. A GFI breaker, as used in a circuit breaker panel, will
trip like a normal breaker. A GFI outlet, as commonly found in bathrooms,
will not since it relies on the feed circuit to be the breaker. The plug
contact have a finite rating so if you NEED a 20A GFI, you should buy
a 20A GFI.

R

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