A ground wire provides a conduction path to ground that is independent of the normal path that carries current within an electrical appliance. … The ground wire and the fuse or breaker (circuit breaker) are standard protective devices used in standard electrical circuits.
What is a ground wire and what is it for?
The ground connections, also called grounding, link the plug of each electrical appliance with the earth, so that in the event that some type of leakage current arises, or discharge of atmospheric origin such as lightning, the harmful energy flows towards the terrain and be diverted