Arc fault breaker

[letgomywago]

Replace it with a regular breaker. If it holds, you have a lose connection or possibly a flying splice.
An AFCI found a flying splice that I would have never found if I hadn't upgraded the breakers to AFCI's.

That's assuming someone didn't return a self test dualfunction when the self test indicated and issue. Best way to test would be the new gfci breaker and then a new afci after showing that the gfci is not detecting a ground fault. When afci trips its never instantaneous its after a second or 2 then they trip.

 

[Little Bill]

I dud and it didn't trip

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Then you don't have a neutral problem or neutral to ground fault. I guess the next step would be to replace the AFCI breakers. That would tell you something there if they hold.

 

[Ponchik]

The issue can not be anywhere upstream from the breaker.

Remove the Green bonding screw from the neutral buss bar at the sub panel.

I thought my comment. The green bonding screw is not at fault.

 

[Donaciano_gonzalez@yahoo.]

I will try you suggestions.
It's just weird that it trips without the load hooked up and the only thing on is the subpanel arcfault


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[Donaciano_gonzalez@yahoo.]

My fellow electricians say they have never seen this before .
My next step is to remove all breakers from main panel and check all neutrals.

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[Ponchik]

The pigtail neutral is on the upstream side of the monitoring AFCI circuitry.

 

[Donaciano_gonzalez@yahoo.]

Yes

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[Ponchik]

The pigtail neutral is on the upstream side of the monitoring AFCI circuitry.

Yes

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Assuming circuit wiring is not connected to the breaker.
So, with the pigtail disconnected, when you connect the breaker to the buss bar and turn it ON, it stays ON, Correct?
As soon as the pigtail is connected to the neutral buss the breaker trips, correct?

 

[Donaciano_gonzalez@yahoo.]

Correct

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[ptonsparky]

What is the voltage from the panel buss to the neutral bar ? Line to neutral.
You do have a meter...

 

[Donaciano_gonzalez@yahoo.]

124v yes I have a meter

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[hbiss]

Just to go over this again. This sub-panel only has two breakers. Both are exactly the same AFCIs. Only one trips as soon as you apply power to the sub-panel. You changed the AFCI that trips to a new one. Now that breaker does the same thing.

Have you tried moving the breaker that trips to another position in the sub-panel?

-Hal

 

[ptonsparky]

124v yes I have a meter

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Both hots to neutral equal 124?
What is line to line?
Line to EG? Both
Neutral bar to Equipment ground bar?

Unless the voltage changes as you add load, 124 volt is not a neutral issue.

You have already spent more in time than replacing the suspect breakers.

 

[Ponchik]

On the breaker, Have you checked continuity?
between
pigtail neutral and line side of the breaker
Pigtail and load side of the breaker
Load neutral and line side of....
Load neutral and load side of....

 

[mtnelect]

Let's try this.

 

[letgomywago]

Let's try this.

How will that help when a self test dualfunction fails directly from the factory. This isn't a mixed up nuetrals issue the gfi breaker held

 

[hbiss]

Let's try this.

There is nothing connected to the breaker!

-Hal

 

[Donaciano_gonzalez@yahoo.]

No. The utility company found a fault with the neutral on there underground feed to service

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[letgomywago]

No. The utility company found a fault with the neutral on there underground feed to service

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Did that fix it?

 

[Donaciano_gonzalez@yahoo.]

They are repairing right now .
It's a direct burial feed

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