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Electrical Troubleshooting Quiz - November 8, 2016

Possible causes of motor bearing failure

A belt-driving motor failed, and was promptly replaced with the same model. The failed motor went out for repair, and came back with new a new drive-end bearing. It passed all of the motor shop’s tests, so was put back into the stockroom. It would not stay there for long. After three weeks of operation, the drive-end bearing of the replacement motor failed. It got sent to the motor shop, and the repaired original replaced it. After a few weeks, they swapped places yet again! In each

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