Ground lights are primarily used to indicate the grounding status of equipment. Which statement is true?

Ground lights are primarily used to indicate the grounding status of equipment. Which statement is true?

• A. They indicate phase rotation.
• B. They indicate presence of moisture.
• C. They indicate voltage magnitude.
• D. They indicate grounding status.

Answer: (D)

Ground lights are used to verify that a solid grounding path to earth exists for the equipment. When the grounding conductor is intact and properly connected to the equipment frame, the light will indicate grounding status, giving you a quick, visual confirmation that a fault path to earth is present and that it’s safe to proceed with service or testing. This is why the true statement is that they indicate grounding status. They don’t indicate phase rotation, which requires tracking the relative order of the three phases. They also don’t indicate moisture, which would require a humidity or moisture sensor. They don’t show voltage magnitude, which would require a voltmeter or voltage indicator. Ground lights are specifically about confirming that the equipment is properly grounded.

Ground lights are used to verify that a solid grounding path to earth exists for the equipment. When the grounding conductor is intact and properly connected to the equipment frame, the light will indicate grounding status, giving you a quick, visual confirmation that a fault path to earth is present and that it’s safe to proceed with service or testing. This is why the true statement is that they indicate grounding status.

They don’t indicate phase rotation, which requires tracking the relative order of the three phases. They also don’t indicate moisture, which would require a humidity or moisture sensor. They don’t show voltage magnitude, which would require a voltmeter or voltage indicator. Ground lights are specifically about confirming that the equipment is properly grounded.