GB 50054-2011 第3.3.2条
| | When selecting conductor cross-sections, the **neutral line (N line)** cross-section should be the same as the phase line (when the phase line cross-section ≤16mm²); if the phase line cross-section >16mm², the N line cross-section may be **not less than 50% of the phase line**, but the influence of harmonic currents must be considered (e.g., LED dimming circuits). |