1/104电缆的选型与配线选择电线平方数和电流一般铜线安全电流最大为:2.5平方毫米铜电源线的安全载流量--28A。4平方毫米铜电源线的安全载流量--35A。6平方毫米铜电源线的安全载流量--48A。10平方毫米铜电源线的安全载流量--65A。16平方毫米铜电源线的安全载流量--91A。25平方毫米铜电源线的安全载流量--120A。如果是铝线截面积要取铜线的1.5-2倍。如果铜线电流小于28A,按每平方毫米10A来取肯定安全。如果铜线电流大于120A,按每平方毫米5A来取。导线的截面积所能正常通过的电流可根据其所需要导通的电流总数进行选择,一般可按照如下顺口溜进行确定:十下五,百上二,二五三五四三倍,七零九五两倍半,铜线升级算.就是10平方以下的铝线,平方毫米数乘以5就可以了,要是铜线呢,就升一个档,比如2.5平方的铜线,就按铝线4平方计算.一百以上的都是截面积乘以2,二十五平方以下的乘以4,三十五平方以上的乘以3,70和95平方都乘以2.5,这么几句口诀应该很好记吧,说明:只能作为估算,不是很准确。另外如果按室内记住电线6平方毫米以下的铜线,每平方电流不超过10A就是安全的,从这个角度讲,你可以选择1.5平方的铜线或2.5平方的铝线。10米内,导线电流密度6A/平方毫米比较合适,10-50米,3A/平方毫米,50-200米,2A/平方毫米,500米以上要小于1A/平方毫米。从这个角度,如果不是很远的情况下,你可以选择4平方铜线或者6平方铝线。如果真是距离150米供电(不说是不是高楼),一定采用4平方的铜线。导线的阻抗与其长度成正比,与其线径成反比。请在使用电源时,特别注意输入与输出导线的线材与线径问题。以防止电流过大使导线过热而造成事故。导线线径一般按如下公式计算:铜线:S=IL/54.4*U`铝线:S=IL/34*U`式中:I——导线中通过的最大电流(A)L——导线的长度(M)U`——充许的电压降(V)S——导线的截面积(MM2)说明:1、U`电压降可由整个系统中所用的设备范围内,分给系统供电用的电源电压额定值综合起来考虑选用。2、计算出来的截面积往上靠.绝缘导线载流量估算铝芯绝缘导线载流量与截面的倍数关系导线截面(mm2)11.52.5461016253550载流是截面倍数9876543.532.5载流量(A)9142332486090100123150210238300估算口诀:二点五下乘以九,往上减一顺号走。三十五乘三点五,双双成组减点五。条件有变加折算,高温九折铜升级。穿管根数二三四,八七六折满载流。2/1040.6/1kV单芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE1×1.01×1.51×2.51×41×61×101×161×251×351×501×701×951×1201×1501×1851×2401×3001×4001×5001×6301×8001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.728.832.536.55.96.16.57.07.59.110.112.113.214.916.919.020.922.825.127.930.533.937.641.946.6495669871101632273404405817961067132116051977254631483981499062857908●0.6/1k两芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE2×1.02×1.52×2.52×42×62×102×162×252×351.131.381.782.242.764.055.106.427.5610.611.111.912.813.817.019.122.524.81051201491892413645067489713/1042×502×702×952×1202×1502×1852×2402×3008.910.712.614.215.817.620.322.727.932.336.540.344.449.255.260.412681765237229553611447356907153●0.6/1k三芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE3×1.03×1.53×2.53×43×63×103×163×253×353×503×703×953×1203×1503×1853×2403×3003×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.710.911.412.313.214.317.419.522.925.228.332.836.940.744.849.755.860.973.5162182224283357559761107413751830249932903938494162397699994212560●0.6/1kV四芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE4×1.04×1.54×2.54×44×61.131.381.782.242.7611.912.513.514.616.51451722222914114/1044×104×164×254×354×504×704×954×1204×1504×1854×2404×3004×4004.055.106.427.568.910.712.614.215.817.620.322.725.719.622.226.329.133.038.543.248.052.958.966.172.881.65958212881699225731914291537865978228106764327316900●0.6/1kV五芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE5×1.05×1.55×2.55×45×65×105×165×255×355×505×705×955×1205×1505×1855×2405×3005×4001.131.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.712.713.414.515.717.121.424.228.931.936.542.548.053.158.865.373.380.890.71692022633484637231041158120912798395453456681821210358132861615721065●0.6/1kV三加一芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE5/1043×1.5+1×13×2.5+1×1.53×4+1×2.53×6+1×43×10+1×63×16+1×103×25+1×163×35+1×163×50+1×253×70+1×353×95+1×503×120+1×703×150+1×703×185+1×953×240+1×1203×300+1×1503×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.71.131.381.782.242.764.055.105.106.427.568.910.710.712.614.215.817.612.313.214.315.518.621.525.227.331.336.040.745.449.154.861.467.775.61652092663605407861209148120422856384548895719721593161156414659●0.6/1kV三加二芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE3×1.5+2×13×2.5+2×1.53×4+2×2.53×6+2×43×10+2×63×16+2×103×25+2×163×35+2×163×50+2×253×70+2×353×95+2×503×120+2×703×150+2×703×185+2×953×240+2×1203×300+2×1503×400+2×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.71.131.381.782.242.764.055.105.106.427.568.910.710.712.614.215.817.613.114.115.316.619.723.127.028.933.438.543.648.952.358.465.372.180.4189239315418617913136316652301320843245582647982421060213145160446/104●0.6/1kV四加一芯低烟无卤耐火电缆DW-NH(B)-YJEDW-NH(A)-YJE标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/km主芯地线DW-NH(B)-YJEDW-NH(A)-YJEDW-NH(B)-YJEDW-NH(A)-YJE4×1.5+1×14×2.5+1×1.54×4+1×2.54×6+1×44×10+1×64×16+1×104×25+1×164×35+1×164×50+1×254×70+1×354×95+1×504×120+1×704×150+1×704×185+1×954×240+1×1204×300+1×1504×400+1×1851.381.782.242.764.055.106.427.568.910.712.614.215.817.620.322.725.71.131.381.782.242.764.055.105.106.427.568.910.710.712.614.215.817.613.314.315.516.920.523.727.930.435.340.645.751.155.561.969.376.485.619525133144066997714721877257735894822614273419236119571482218837●0.6/1k两芯铠装低烟无卤耐火电缆DW-NH(B)-YJE23DW-NH(A)-YJE23标称截面mm2导体直径mm电缆近似外径mm电缆近似重量kg/kmDW-NH(B)-YJE23DW-NH(A)-YJE23DW-NH(B)-YJE23DW-NH(A)-YJE232×1.52×2.52×42×62×102×162×252×