Question 314Electricity & Electronics - Assistant Engineer

The correct answer is B) totally darkened switchboard ground-detecting light. In an ungrounded distribution system, if a current-carrying conductor accidentally makes contact with a metal wiring conduit, it would create a ground fault. This ground fault would cause the switchboard's ground-detecting light to go completely dark, indicating the presence of the ground fault. The other answer choices are incorrect because: A) the wattmeter reading would not be lower, but rather would be higher due to the ground fault; C) the voltmeter reading would not be higher, but rather would be lower due to the ground fault; and D) the power factor meter would not read 1.0, as the ground fault would affect the power factor.