Which statement about ground lights in electrical equipment is true?

Which statement about ground lights in electrical equipment is true?

• A. They indicate ambient lighting levels only.
• B. They indicate grounding continuity.
• C. They indicate motor speed.
• D. They indicate installation date.

Answer: (B)

Ground lights are there to show grounding continuity in electrical equipment. A small indicator is connected so that when the equipment frame is properly bonded to the service ground, a current path exists and the light remains on. This gives a quick visual check that the protective grounding path is intact, which is essential for safely carrying fault current back to the source and allowing protective devices to operate correctly if a fault occurs. If the ground path is interrupted or missing, the light goes out, signaling a potential shock hazard and the need for service. They do not indicate ambient lighting levels, motor speed, or installation date.

Ground lights are there to show grounding continuity in electrical equipment. A small indicator is connected so that when the equipment frame is properly bonded to the service ground, a current path exists and the light remains on. This gives a quick visual check that the protective grounding path is intact, which is essential for safely carrying fault current back to the source and allowing protective devices to operate correctly if a fault occurs. If the ground path is interrupted or missing, the light goes out, signaling a potential shock hazard and the need for service. They do not indicate ambient lighting levels, motor speed, or installation date.