Which statement best describes a grounding switch?

Which statement best describes a grounding switch?

• A. A device that is opened to disconnect from ground
• B. A device that is closed to connect wires or electric apparatus to ground
• C. A device that monitors voltage
• D. A device that provides fault indication

Answer: (B)

Grounding switches are used to establish a safe ground reference for equipment that workers will touch during maintenance. When you close the switch, the connected wires or electrical apparatus are tied directly to earth, providing a low-impedance path for any stray voltage or stored energy to discharge. This keeps the equipment at ground potential, protecting personnel from shock or arcing while work is performed. The device is not about measuring voltage or signaling faults; those roles are handled by separate instruments. After maintenance is complete, the switch is opened to remove the grounding path and restore normal operation.

Grounding switches are used to establish a safe ground reference for equipment that workers will touch during maintenance. When you close the switch, the connected wires or electrical apparatus are tied directly to earth, providing a low-impedance path for any stray voltage or stored energy to discharge. This keeps the equipment at ground potential, protecting personnel from shock or arcing while work is performed. The device is not about measuring voltage or signaling faults; those roles are handled by separate instruments. After maintenance is complete, the switch is opened to remove the grounding path and restore normal operation.