I have two kitchen lights controlled by two three way switches. The CB trips on this circuit. I thought we had a bad CB but the new CB also trips. I noticed one of the two lights was on before the new CB tripped. No work has been done on this circuit for many years. Any ideas what might be causing the CB to trip?
Insulation may have biodegraded or become brittle due to light bulb heat, and flaked off the wire. Then the wire touched something it was not supposed to touch and a short resulted.
You will have to find where any problem might be, it could be in an outlet box other than where the light in question is or where the swithces controlling the light are.
The average homeowner who lost his house in the Oklahoma tornadoes should move for good and not rebuild. Too much complexity watchdogging the contractor. Too much a chance to be defrauded.