GB 50054-2011 第3.3.3条
| | The cross-section of the protective earthing conductor (PE conductor) shall meet the thermal stability requirements: when the phase conductor cross-section is ≤16mm², the PE conductor cross-section shall **equal that of the phase conductor**; when 16mm² < phase conductor ≤35mm², the PE conductor cross-section shall **be 16mm²**; when the phase conductor >35mm², the PE conductor cross-section shall **be not less than 50% of the phase conductor**. |