Gfci


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Old 02-24-04, 09:12 PM
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Gfci

My 120vac class A Group I GFCI turns itself off about 5 seconds after power is applied. Is that delay in turning itself off, a sign that the circuit breaker itself is bad rather than wiring shorts or opens etc?

My experience is an instantaneous tripping when there is a wiring or downstream device problem.
 
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Old 02-25-04, 08:20 AM
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Are you talking about a GFCI breaker, or a GFCI receptacle? Is the GFCI completely unloaded when you apply power, or is there a load? There is no 5-second delay in a GFCI, so something more is going on here.
 
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Old 02-26-04, 07:48 PM
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The GFCI that I am talking about is a circuit breaker. The only thing in the line are receptacles and light swithes.

When I switch on, it switches itself back off, but not immediately. I thought that might be a known symptom of bad circuit breaker.
 
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Old 02-26-04, 07:55 PM
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If the breaker is tripping after five seconds, then it's an overload trip, not a GFCI trip (or the breaker is bad). Do an experiment. Swap out the GFCI breaker and put in an equivalent non-GFCI breaker. See if it still trips. If not, buy a new GFCI breaker. If the non-GFCI breaker trips too, then hunt for the overload. It could be caused by a high-resistance short somewhere on the circuit. Could even be caused by a nail or screw used on new siding or to hang a picture or mount a bookshelf.
 
 

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