Which risk significantly increases when a circuit breaker is improperly sized in an electrical power distribution system?

💡 Explanation

When a circuit breaker is undersized, overload or fault currents may not be interrupted quickly enough because the breaker's current rating is insufficient, leading to overheating of protected components and potentially causing cascading failures extending throughout other parts. Therefore, cascading failures are much likely, rather than harmonic distortion, raised impedance, or core saturation, each require separate initiating events.

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