Gentlemen and women:

I am not sure if you all remember, but I had the circuit breaker panel with
the bad aluminum feeder cable that was shooting sparks.

We finally put the new panel in yesterday -- by *we* I mean *I* stood around
while my electrician buddy did the work. We used 6 AFCI's in the panel for
the bedroom and kitchen circuits. When it came time to power the panel back
up, AFCI breaker number 6 refused to latch.

Here is the big question: How do you locate the arc fault that's tripping
the breaker? In this old house the wire is buried deep in plaster walls and
routed from the basement up to the attic and back down again, FWIW, it's not
K&T, just old cloth-covered wiring from the 40's. My buddy had a word for
it I had never heard before -- ragwire.

TKS