Engine: Electricity

Question 404 of 1,386

In a three-phase electrical system, three ground detecting lamps are provided. One lamp goes dark and the others increase in brightness when the "ground test" button is pushed. What is indicated?

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ka karestivo · May 5, 2015

I believe this question is incorrect

ka karestivo · May 5, 2015

when the test button is pressed all three lights should shine brightly, if the bulbs are in good working order. when released a dark lamp, with an operational bulb, will signify a ground on that line.

jc jcpalmersc · Mar 27, 2016

I agree with KARESTIVO; the test button should test the lamp operation not test the circuit for grounds

Engine: Electricity

In a three-phase electrical system, three ground detecting lamps are provided. One lamp goes dark and the others increase in brightness when the "ground test" button is pushed. What is indicated?

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