004-.006 amps). Your house wiring is an electrical system, connected to ground at your electrical panel. Tools, appliances, ...

But the metal case is connected to an electrical path consisting of the ground wire in the power cord plugged into the wall socket, as well as the wire from the wall socket to the breaker panel.

First on the electrical wire color code is black ... to be serving. Equipment grounding conductors channel that unintentional ...