Calculation of the current rating of electric cables . part 1 : current rating equations 100 % load factor and calculation of losses . section 2 : sheath eddy current loss factors for two circuits in flat formation 电缆载流量计算.第1部分:载流量公式100 %负荷因数和损耗计算.第2节:双回路平面排列电缆金属套涡流损耗因数