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Engine_2014 : Electricity - 1024/2299
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In conducting a megger test as shown in figure "A" of the illustration, a ground is detected. For testing purposes, how can the motor itself be eliminated or confirmed as the source of the ground?
A) Disconnect the motor feeder cable leads at the motor and perform the megger test again at the disconnected motor feeder cable leads.
B) Disconnect the motor feeder cable leads at the motor starter and perform the megger test again at the disconnected motor feeder cable leads.
C) Disconnect the motor feeder cable leads at both ends and perform the megger test again at either end of the motor feeder cable leads.
D) Disconnect the motor feeder cable leads from the motor itself and perform the megger test again as shown in figure "B".
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Illustration EL-0009

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