Question 527Electricity & Electronics - QMED
70% to passIf all of the ground detection lamps burn with equal brilliance, whether the test button is depressed or released, what does this indicate?
Ano ground-faults exist
Ba ground-fault exists in all phases
Ca high impedance ground-fault exists
Da dead ground-fault exists
AI Explanation
The correct answer is A) no ground-faults exist. If all the ground detection lamps burn with equal brilliance regardless of whether the test button is depressed or released, this indicates that there are no ground-faults present in the system. The equal brightness of the lamps signifies that the ground detection circuit is functioning properly and there is no abnormal grounding condition. The other options are incorrect because: B) a ground-fault in all phases would cause unequal brightness of the lamps, C) a high impedance ground-fault would also result in unequal lamp brightness, and D) a "dead" ground-fault, meaning no ground-fault at all, would not cause the lamps to burn equally.
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