[RE-wrenches] AFCI trip on metal roof

[Jerry Shafer]

Wrenches,
We have had AFCI issues with also no problems to be found, in some cases
very early am or late pm and we fould that its comming from AC Compressor
contactors on the same building, also arc welders will cause a trip
Jerry
On Mar 23, 2016 11:08 AM, "Drake" <drake.chamberlin at redwoodalliance.org>
wrote:

> Hello Wrenches,
>
> We have a project with an array on a large metal roof. The AFCI has been
> tripping. Investigating the system, there is no evidence of any arcing: the
> wiring and connections are all very tight.
>
> SMA tech support says it is likely that the nuisance tripping comes from
> electrical noise getting picked up by the large metal roof.
>
> What has been your overall experience with nuisance tripping of arc fault
> protection? What were the suspected causes? What was the solution?
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
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