He used the screwdriver to remove the CO2 detector. That's what shorted it out. I agree, he should have exhausted GFI's and breakers before opening the receptacle up. No trace required. It was a tripped breaker.That wasn't the mistake. The mistake was dismantling a receptacle, without first making sure he knew what breaker it was connected to. Depending on what the failure was, and what else was happening in the house, the power could have returned unexpectedly.
110 (V) can hurt you badly, especially, if it is not a glancing shock. I think the electric chair uses less than 100 (V) to execute someone.
This was a case where:
a) All the circuit breakers in the breaker box should have been toggled. Sometimes, under short-circuit loads, the breaker will trip without flipping to "off." As such, it is necessary to toggle each breaker, one at a time, until the flipped one is found and reset.
b) All GFCI outlets should have been found and checked.
c) All upstream outlets from the malfunctioning one needed to be checked (assuming the problem was not obviously at a GFCI or a breaker.)
d) If you can't prove power is disconnected, then you have to turn everything off before working on the malfunctioning outlet. "TURN THEM ALL OFF." The master disconnect helps.
e) The correct tools to trace wiring inside a house should have been used.
Electric chairs use more than 15 amps...






