Which risk increases when a power distribution system uses undersized neutral conductors in a three-phase four-wire circuit?

💡 Explanation

When neutral conductors are undersized in three-phase systems, harmonic currents generated by non-linear loads circulate, disproportionately overloading the neutral conductor because harmonics sum rather than cancel. Therefore, harmonic overload risk increases, rather than transformer saturation, skin effect changes, or reactive power imbalances which are driven by different factors.

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