Thanks Bruce good idea.
I went over yesterday and checked all sw. and plug connection.

Checked voltage at panel 255v. A-B 127to N.
Maybe a fluckuation triggering AFCI?

It may be days before any tripping.

When I was checking connections, I drew a visable-audible arc several times but AFCI didn't trip. I've experienced this on other houses I've wired, but without the problems of this house.

Find it interesting that it wouldn't trip.

Last edited by markb; 11/26/09 02:59 PM.