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← TechnologyWhich consequence results when undersized residential circuit breakers repeatedly trip under expected load?
A)Conductor insulation thermal degradation occurs✓
B)Overvoltage transients damage connected electronics
C)Increased inductive reactance diminishes supply
D)Power factor markedly improves negligibly
💡 Explanation
Repeated tripping from an undersized breaker causes prolonged moderate overcurrent events; because ohmic heating increases with I^2*R, thermal runaway accelerates the insulation breakdown, therefore increasing risk of arcing faults rather than improving power factor or affecting voltage, which result from reactive loads.
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