How is a wall box grounded?

A wall box is typically grounded by connecting a grounding wire from the electrical system to the grounding screw or terminal on the box itself. This wire is usually a bare copper or green insulated wire that ensures the box is at ground potential, providing safety against electrical faults. If the wall box is metal, it must be bonded to the grounding system to prevent electric shock hazards. In cases where the box is non-metallic, grounding may not be necessary, but proper grounding of the circuit remains essential.