Test Your Knowledge – Part 1

For the next few weeks we will post a motor reliability question for you to test your knowledge. Scroll to the end to see the correct answer.

Per IEEE Standard 43-2013, what is the recommended minimum resistance-to-ground for a 460V AC Induction motor manufactured after 1970?

A. 100 MΩ
B. (1/kV) +1 MΩ
C. 1/kV MΩ
D. 5 MΩ

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The correct answer is D.