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.

from causing injury if it's energized by a frayed hot wire. In a properly grounded system, appliances and metal boxes connect back to the grounding bus of the breaker panel. From there ...

A ground fault is a type of short circuit where a hot wire comes into contact with ... carry the stray current back to the panel, tripping the breaker. There are many types of circuit breakers ...

If something goes wrong in that panel, it may cause those ... feed wire is clamped to the circuit breaker, while the neutral (white) wire and bare copper ground wire are clamped to the common ...

So if the metal frame is grounded, a wiring fault trips a breaker, flips an RCD or ... Use that to go from the switch to the existing ground lines in the box and you'll be fine.

The ground wire, like the neutral wire, safely brings electricity back to the breaker box. If electricity cannot reach the neutral wire and there is no safety ground wire, it will seek other ways ...