What is the purpose of a grounding wire in electrical appliances?

The purpose of a grounding wire in electrical appliances is to prevent electrical shock. Grounding wires serve as a safety mechanism that directs any stray electrical currents away from the user and safely into the ground. This is crucial in preventing potential electrical shocks that could occur if there were a fault in the appliance or if someone accidentally came into contact with a live wire.

In the event of a malfunction or fault, such as a short circuit, the grounding wire helps ensure that the excess current has a safe pathway to the earth, reducing the risk of injury. This protective measure is particularly vital in settings where wet conditions may increase the risk of electrical hazards, which is common in esthetic practices that often use water-based products and equipment.