A ground wire is a safety feature in electrical systems that helps prevent electric shock and equipment damage. It provides a path for excess electrical current to flow safely into the ground, reducing the risk of electrical fires and ensuring that devices operate correctly. Ground wires are typically connected to metal parts of electrical equipment and to the earth. In residential wiring, the ground wire is usually green or bare copper. It works alongside other wires, such as the hot wire and neutral wire, to create a complete circuit. Proper grounding is essential for the safety of both people and electrical devices in homes and buildings.