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不同环境温度下载流量修正系数导体工作温度（ºC）环境温度（ºC）（空气中）101520253035404550501.701.621.521.421.321.221.000.75-601.581.501.411.321.221.111.000.860.73651.481.411.341.261.181.091.000.890.77701.411.351.291.221.151.081.000.910.81801.321.271.221.171.111.061.000.930.86901.261.221.181.141.091.041.000.940.89不同环境温度下载流量修正系数导体工作温度（ºC）环境温度（ºC）（土壤中）101520253035501.261.181.101.000.890.77601.201.131.071.000.930.85651.171.121.061.000.940.88701.151.111.051.000.940.88801.131.091.041.000.950.90901.111.071.041.000.960.92电缆在空气中并列敷设时载流量修正系数根数载流量修正系数1236468912S=1d1.000.900.850.800.820.80---S=2d1.000.980.900.950.900.850.800.80S=3d1.001.000.980.980.980.900.850.85不同土壤热阻系数的载流量修正系数电压（KV）截面范围（mm2）土壤热阻系数ρT=(ºC-M/W)0.81.01.21.51.82.0.53.0135及以下50~120150~300400及以上1.061.000.950.890.840.810.750.711.081.000.940.870.800.770.700.651.081.000.930.860.790.760.690.641.091.000.930.850.790.760.680.631035及以下50~120150~300400及以上1.051.000.950.900.840.820.760.701.061.000.940.880.820.800.730.681.071.000.940.870.810.780.710.661.071.000.930.870.810.770.710.65电线电缆穿管敷设于空气中载流量修正系数（参考值）穿管根数修正系数2~40.805~80.609~120.5012以上0.45注：1、穿管电缆根数系指有负荷且发热的导线根数。中性线或保护线可不计。2、一般情况下，穿管根数体积占管内体积的40%左右。3、当管子并列敷设时乘以0.95的修正系数。三芯或三个单芯电缆平行成组直埋于土壤中载流量修正系数（参考值）电缆间距组数23456相互接触70~100(mm)220~250(mm)0.790.6690.630.580.550.850.750.680.640.600.870.970.750.720.69电缆在桥架上无间距配置多层并列时持续载流量的校正系数叠置电缆层数水平排列1234梯架0.800.660.550.50托盘0.700.550.500.45不同埋地深度时载流量修正系数电压（KV）深度L（mm）修正系数L=7001.001.00700L=10000.970.981000L=12500.950.961250L=15000.930.951KV电缆户外明敷无遮阳时标称截面（mm2）校正系数950.991200.981500.971850.962400.94管道组内同步负荷载流量修正系数（参考值）管道间距离组数12345相互接触0.820.750.660.590.5670~100mm-0.760.690.620.60220~250mm-0.770.720.680.67环境温度修正系数导体温度环境温度（空气中）环境温度（土壤中）101520253035404550101520253035501.701.621.521.421.321.221.000.75-1.261.181.101.000.890.77601.581.501.411.321.221.111.000.890.731.201.131.071.000.930.85651.481.411.341.261.181.091.000.890.771.171.121.061.000.940.87701.411.351.291.221.151.081.000.910.811.151.111.051.000.940.88801.321.271.221.171.111.061.000.930.861.131.091.041.000.950.90901.261.221.181.141.091.041.000.940.891.111.071.041.000.960.92穿管修正系数穿管根数2-45-89-1212修正系数0.800.600.500.45桥架修正系数叠置层数1234梯架0.800.650.550.50托盘0.700.550.500.45BV、BLV型绝缘线穿半硬塑料管、波纹管管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.51620252.52532420625324010324050162540506335505063709563120注:半硬塑料管、波纹管的公称管径指外径。BV、BLV型绝缘线穿电线管管径选择单位：mm导线截面（mm2）导线根数234567891011121.0191.51619252.51941962532381038511632382538516435505164767095647612015018576注:1.电线管的管径指外径。2.电线管规格根据GB3640-83。BV、BLV型绝缘线穿钢管管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.515202.546202510253240162540253240503550504065705065658095120658010015080185240100注:1.钢管的管径指内径。2.钢管规格根据GB3092-82《低压流体输送用焊接钢管》。BV、BLV型绝缘线穿硬塑料管（轻型）管径选择单位：mm导线截面（mm2）导线根数234567891011121.0201.51620252.54253262032401025324050162532405063354050635070509512063150注:硬塑料管（轻型）的公称管径指外径。BV、BLV型绝缘线穿硬塑料管（重型）管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.51620252.542025326324010253240501625405035505070注:硬塑料管（重型）的管径指外径。BX、BLX型绝缘线穿半硬塑料管、波纹管管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.5202532402.5425324065010325063162540633550506370注：半硬塑料管、波纹管的管径指外径。BX、BLX型绝缘线穿硬塑料管（轻型）管径选择单位：mm导线截面（mm2）导线根数234567891011121.01.52025322.54324061025324050162540506335505063709563120注：硬塑料管（轻型）的管径指外径。BX、BLX型绝缘线穿硬塑料管（重型）管选择单位（mm）导线截面（mm2）导线根数234567891011121.01.52025322.542563240501032405016254050355050注：硬塑料管（重型）的公称管径指外径。电力电缆穿金属最小管径VVVLV0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120150185焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下直线20253240507080一个弯曲时2532507080100二个弯曲时3240507080100125YJVYJLV0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120150185焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下直线15202532405070一个弯曲时1520253240507080二个弯曲时3220253240507080ZQDZLQD0.6/1KV电缆标称截面（MM2）162535507095120150185240焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下直线3240507080一个弯曲时40507080100二个弯曲时507080100125注：适用于三芯、三芯+N及四芯等截面电力电缆。电力电缆穿聚氯乙烯管最小管径YJVYJLV0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120聚氯乙烯硬质电线管（PC）最小管径（mm）电缆穿管长度在30m及以下直线202532405063一个弯曲时202532405063二个弯曲时2532405063注：适用于三芯、三芯+N及四芯等截面电力电缆。VVVLV0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120聚氯乙烯硬质电线管（PC）最小管径（mm）电缆穿管长度在30m及以下直线202532405063一个弯曲时202532405063二个弯曲时2532405063ZQDZLQD0.6/1KV电缆标称截面（MM2）162535507095120聚氯乙烯硬质电线管（PC）最小管径（mm）电缆穿管长度在30m及以下直线324050一个弯曲时32405063二个弯曲时405063铠装电力电缆穿金属管最小管径VV*VLV*0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120150185焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下一个弯曲时25324050708080二个弯曲时253240507080100*：适用于VV22,32,43,VLV22,32,43YJV*YJLV*0.6/1KV电缆标称截面（MM2）1.52.54610162535507095120150185焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下一个弯曲时2532405070100二个弯曲时2532405070801008.7/10KV一个弯曲时80100125二个弯曲时100125*：适用于YJV22,32,YJLV22,32ZQD*ZLQD*0.6/1KV电缆标称截面（MM2）162535507095120150185焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下一个弯曲时7080100二个弯曲时70801008.7/10KV一个弯曲时80100125二个弯曲时100125*：适用于ZQD02,03,22,23,32,33,41,VLV02,03,22,23,32,33,41注：适用于三芯、三芯+N及四芯等截面电缆穿墙保护管。控制电缆穿金属管或聚氯乙烯硬质管最小管径电缆截面（MM2）控制电缆芯数2456,7810121416192430370.75~1.0焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）电缆穿管长度在30m及以下直通1520253240一个弯曲时202532405070二个弯曲时2532405070电缆截面（MM2）焊接钢管（SC）或水煤气钢管（RC）最小管径（mm）1.5~2.5电缆穿管长度在30m及以下直通2025324050一个弯曲时202532405070二个弯曲时253240507080100电缆截面（MM2）聚氯乙烯硬质