Also found in: Acronyms.
1. In electric wiring, a connection from the exposed metal parts of equipment housings to provide a path to ground in the event such parts become energized as a result of failure of the insulation of a conductor housed within the equipment; a ground connection to any noncurrent-carrying metal parts of a wiring installation or equipment, or both.
2. A ground connector to (a) noncurrent-carrying metal parts of electrical equipment or (b) the metallic shields of a wiring installation, or both.