Generally the scariest wiring is found in churches.
It is installed by the faithful, typically.
And the results are miraculous: when no one has yet died.
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Anything installed by illegal immigrant 'experts'...
A Reno couple used such 'talent' on a pretty new home located 800 feet from the fire station. It burnt to the ground while they were in Vegas. Use your imagination! Yeah, the cause was an electrical fire.