Which risk increases when incorrectly sized miniature circuit breakers (MCBs) are installed in an industrial control panel?

💡 Explanation

When undersized MCBs are installed, component stress increases when sustained overcurrent occurs, because the breaker's thermal trip mechanism fails to activate quickly enough, leading to overheating and potential damage of downstream components. Therefore elevated component stress results, rather than nuisance tripping, harmonic distortion, or reduced power factor which have different causality.

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