I was in the process of rewiring over 60% of my house and finally all rewiring are done. Yesterday was the finishing aspect for the electricians to do an electrical panel schedule - I have two separate panels A & B and they needed to mark all the circuit breakers existing and new as well as mark on each box/device which panel/circuit they belong to.
So as we were labeling one of the junction boxes were opened with some old wires in them, they had it all "stretched out" in order to figure out which wire goes where.
When one of the walked by the hallway where the box is with wire sticking out, he brushed his shoulder against some wires and suddenly BOOM!!! I heard a small explosion. The junction box is now partially black and this is what he called a "home run" connecting wire to the panel and running to another box.
The wires in the box "appears" to be ok to me. The electrician told me I should consider changing all "old wires" since they are old (1972) and may be the cause of the problem.
Replacing ALL old wires are cost prohibitive. What is the best way to determine why I had an explosion? I cannot see a wire being messed up as a result of the explosion...
and I could not tell if he said it just for me to hire him for another few weeks.
Thanks,
MC