The plant manager calls you into her office and tells you about a months-old motor failure problem in an area of the plant you’re not familiar with. Though this area makes up about 10% of the production floor, it’s responsible for 90% of the motor failures. Maintenance had sent the motors out to be examined by a motor shop. The shop suggested there were grounding problems, so maintenance drove ground rods for each motor. But that did not solve the problem. The plant manager says ...
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