[RE-wrenches] AFCI trip on metal roof

Drake drake.chamberlin at redwoodalliance.org
Wed Mar 23 14:08:25 PDT 2016


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
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
<http://athens-electric.com/>http://athens-electric.com/



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