耐火电缆载流量及外径

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1、2—4NHB—KVV22   NHA—KVV22   0.6/1kV电缆芯数标称截面mm2电缆计算外径mm导体直流电阻+20℃不大于Ω/km试验电压A.CkV.5min绝缘电阻+20℃不小于MΩ.km电缆计算重量kg/km71012141.521.025.726.427.612.13.511.0608830894993192427303730.336.437.138.541.312201883199121552550457102.519.621.022.527.57.413.59.315266117259951214192428.329.632.739.3108312091

2、517228927303735.641.344.9243026183091457421.923.625.34.613.59.266478193810121431.433.635.3101817631967457623.225.127.03.083.57.88779925112810121435.136.138.0194021172380457101025.527.630.039.01.833.56.51010120915162539载流量                 NHB—VV   NHA—VV0.6/1kV          NHB—VV22  NHA—VV22敷设

3、条件标称截面mm2空气敷设单芯二芯三芯四芯1.52.54625334456233141522127364634421016253577101133163729512315062831071315876100122507095120198250308357181229270322159199243281148187228265150185240300411474564652367420320366429489300344环境温度30℃工作温度70℃结构尺寸及电气性能多根电缆敷设载流量修正系数（1-12根）电缆根数1324686912 n（行）12 m（列）          

4、排列形式S             S=dS=2dS=3d1.000.850.951.000.800.951.000.700.900.950.700.900.950.600.900.95--0.850.90--0.800.85--0.80 0.85多根电缆敷设载流量修正系数（上表以外排列形式）n123Sm7-2045678-203456789-1011-1213-1516-1920S=d0.700.600.560.530.510.500.480.410.370.340.320.310.300.300.300.300.30S=2d0.80—0.730.720.710.70——

5、0.680.660.650.310.640.630.620.610.60 环境温度修正系数工作温度℃环境温度℃15202530354045701.171.121.0610.940.870.77