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Which outcome occurs when undersized circuit breakers protect industrial induction motor circuits during startup?

A)Nuisance tripping due to inrush current
B)Motor overheating due to harmonics
C)Arc flash hazard during normal operation
D)Increased energy consumption from reactive power

💡 Explanation

When undersized breakers protect induction motors, nuisance tripping results from exceeding the breaker's instantaneous trip setting because induction motors draw a high inrush current during startup. Therefore nuisance tripping occurs, rather than overheating, arc flash, or increased consumption which require sustained overloads or insulation failures.

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