arc fault tripping

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nizak

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Have an arc fault breaker that trips as soon as the switch is turned on to some can lighting in a bedroom.wall outlets are on the same circuit and work fine when a load is put on them.if I take the lamps out of the cans and turn on the switch it holds as well.could one of the thermal devices in the cans be causing this? Any help appreciated.
 
nizak said:
Have an arc fault breaker that trips as soon as the switch is turned on to some can lighting in a bedroom.wall outlets are on the same circuit and work fine when a load is put on them.if I take the lamps out of the cans and turn on the switch it holds as well.could one of the thermal devices in the cans be causing this? Any help appreciated.
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Thermal device could be causing problems, I wouldn't focus too hard on that just yet though, have you tried installing lamps until you find which lamp or luminaire seems to be giving trouble? Once you find one move that lamp to other luminaires to help verify if it is the lamp or the luminaire causing problems. I wouldn't rule out any potential bad connections at a socket either.

Lamp type could also be non compatible with the AFCI, like maybe some CFL's or LED's create a waveform the AFCI doesn't like, incandescents shouldn't give you this kind of problem though.
 
I had the exact same issue a couple of years ago. They were Halo cans and it turned out that the screw that holds the lampholder to the support bracket was in the wrong hole thus creating a N-G short when the lamp was engaged. Simply moving the screw to an adjacent hole solved the problem.
 
nizak said:
Did the breaker only trip when the lamp was installed in that particular socket?
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Yes. I was scratching my head so I actually sent the can back to Halo and they discovered the screw in the wrong place. They compensated me monetarily for the time I wasted troubleshooting. It was a couple hundred bucks if I remember correctly.
 
A/A Fuel GTX said:
I had the exact same issue a couple of years ago. They were Halo cans and it turned out that the screw that holds the lampholder to the support bracket was in the wrong hole thus creating a N-G short when the lamp was engaged. Simply moving the screw to an adjacent hole solved the problem.
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That fits perfectly with tripping either a GFCI breaker or the GF section of an AFCI breaker.
OP: Does the AFCI breaker in question distinguish between an arc or GF event?
 
Distinguishing between a/f and g/f? Are all afci's designed to do this? Particular one in question is a HOM115.
 
nizak said:
Distinguishing between a/f and g/f? Are all afci's designed to do this? Particular one in question is a HOM115.
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Arc Faults have around 30 ma of ground fault protection built in so that's why the N-G connection at the lampholder trips the breaker.
 
If I recall Siemens afci's have a indicator that tells what type fault has occurred. HOM do not.
 
nizak said:
If I recall Siemens afci's have a indicator that tells what type fault has occurred. HOM do not.
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You get what you pay for. I haven't seen the self diagnosing breakers but I like the idea. I'm either Cutler Hammer CH or Square D QO.
 
Square D HOM and QO have a memory and will tell you the reason they tripped.

Cutler Hammer CH also have a memory. Its optional on the BR series.

Ge removed the GF circuitry so no need for a memory. In my opinion that was a big mistake on GE's part since the GF circuitry is the most important part of an AFCI breaker.
 
curt swartz said:
Square D HOM and QO have a memory and will tell you the reason they tripped.

Cutler Hammer CH also have a memory. Its optional on the BR series.

Ge removed the GF circuitry so no need for a memory. In my opinion that was a big mistake on GE's part since the GF circuitry is the most important part of an AFCI breaker.
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How do they relay the information? The ones I'm using were purchased quite some time ago so apparently this feature is more recent.
 
How would one go about retrieving the info that the breaker has stored? I don't see any type of indicator on the Him breaker.
 
curt swartz said:
Square D HOM and QO have a memory and will tell you the reason they tripped.

Cutler Hammer CH also have a memory. Its optional on the BR series.

Ge removed the GF circuitry so no need for a memory. In my opinion that was a big mistake on GE's part since the GF circuitry is the most important part of an AFCI breaker.
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I have not seen this feature yet but has been a while since I have used any new AFCI's from them.

nizak said:
How would one go about retrieving the info that the breaker has stored? I don't see any type of indicator on the Him breaker.
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I think Siemens was the first to have that ability, and had an indicator light on the unit that would flash a code telling you the reason for the trip, or something similar to that.
 
Schneider Sq d website has a troubleshooting guide for afci breakers.Looks like the amount of time (in seconds) that it takes the breaker to trip indicates the type of fault that's occurring.
 
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