Ahh, the plot thickens. How ya been Eagle? Things booming down here. The first thing I would do is break the lites off the circuit and ohm it out just to see if its fault free. Now dont ask me me why but i have been told that GFI's will cause arc faults to trip. I never catch a gfi off an arc fault circuit cause i dont want to find out if it's true! lol.
Did you change out the panel that the circuit landed in? Its all in how far the AHJ makes you go with the upgrade. We did two service upgrades today. One one a 1940's house and one on a house 15 years old. The 40's house we had to do a disco and new panel but left all branch circuits as is...no afci and no gfi. I still dont feel that all the kinks have been worked out of this new technology, especially when it is used in a retrofit application. I wont tell you to remove afci breaker, but ________ (you fill in the rest)
