I have a brand new installed "GE A-Series" panelboard. Bolt on THQB's. after a teacher somehow got a peice of jewrey stuck in an outlet.She claimed the breaker never tripped, after looking at the plug face and the jewlrey peice it had arced pretty bad. To test the theory I directly shorted circuit. The breaker did not trip, the jumper wire melted and caught fire. I tried another breaker, same thing. Brand new go figure.