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← TechnologyWhich risk increases most when a 480V electrical panel's molded-case circuit breaker repeatedly trips due to overload?
A)Arc flash incident during reset✓
B)Conductor insulation thermal breakdown
C)Transformer core saturation from harmonics
D)Ground fault from neutral conductor uplift
💡 Explanation
When a breaker repeatedly trips due to overload, attempting to reset it can lead to an arc flash event because the contacts may degrade over time and not fully engage, causing ionization of the air and rapid energy release. Therefore, arc flash risk increases, as opposed to insulation breakdown, core saturation or ground faults which require alternative wiring issues.
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