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?
A
there is a ground on the line with the dark lamp
B
the dark lamp must be replaced
C
there are grounds on the lines with the bright lamps
D
this is a normal condition
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Question 1 / 205eccefa4bacbc34ba4d483d9
Question 1 of 205eccefa4bacbc34ba4d483d9
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?
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?