一、电线电缆选用的一般原则在选用电线电缆时，一般要注意电线电缆型号、规格(导体截面)的选择。⒈电线电缆型号的选择选用电线电缆时，要考虑用途，敷设条件及安全性；例如:根据用途的不同，可选用电力电缆、架空绝缘电缆、控制电缆等；根据敷设条件的不同，可选用一般塑料绝缘电缆、钢带铠装电缆、钢丝铠装电缆、防腐电缆等；根据安全性要求，可选用阻燃电缆、无卤阻燃电缆、耐火电缆等。⒉电线电缆规格的选择确定电线电缆的使用规格(导体截面)时，一般应考虑发热，电压损失，经济电流密度，机械强度等选择条件。根据经验，低压动力线因其负荷电流较大，故一般先按发热条件选择截面，然后验算其电压损失和机械强度；低压照明线因其对电压水平要求较高，可先按允许电压损失条件选择截面，再验算发热条件和机械强度；对高压线路，则先按经济电流密度选择截面，然后验算其发热条件和允许电压损失；而高压架空线路，还应验算其机械强度。若用户没有经验，则应征询有关单位或人士的意见。1、同一规格铝芯导线载流量约为铜芯的0.7倍，选用铝芯导线可比铜芯导线大一个规格，交联聚乙烯绝缘可选用小一档规格，耐火电线电缆则应选较大规格。2、本表计算容量是以三相380V、Cosφ＝0.85为基准，若单相220V、Cosφ＝0.85，容量则应×1/3。3、当环境温度较高或采用明敷方式等，其安全载流量都会下降，此时应选用较大规格；当用于頻繁起动电机时，应选用大2～3个规格。4、本表聚氯乙烯绝缘电线按单根架空敷设方式计算，若为穿管或多根敷设，则应选用大2～3个规格。5、以上数据仅供参考，最终设计和确定电缆的型号和规格应参照有关资料或电工手册。X67SC4122.L12X67DO9332.L12X67DV1311.L08X67DV1311.L12X67BC8513.L12X67BCD321.L12X67BCD321.L12-1X67BCE321.L12X67BCG321.L12X67BCJ321X67BCJ321.L12X67CA0A41.0020X67CA0A41.0050X67CA0A41.0100X67CA0A41.0150X67CA0A41.0200X67CA0A51.0020X67CA0A51.0050X67CA0A51.0100X67CA0A51.0150X67CA0A51.0200X67CA0B02.0020X67CA0B02.0050X67CA0B02.0100X67CA0B02.0150X67CA0B12.0005X67CA0B12.0020X67CA0B12.0050X67CA0B12.0100X67CA0B12.0150X67CA0B22.0050X67CA0B22.0150X67CA0B22.0500X67CA0B32.0050X67CA0B32.0150X67CA0B32.0500X67CA0B42.0050X67CA0B42.0150X67CA0B42.0500X67CA0B52.0050X67CA0B52.0150X67CA0B52.0500X67CA0C02.0020X67CA0C02.0050X67CA0C02.0100X67CA0C02.0150X67CA0C12.0020X67CA0C12.0050X67CA0C12.0100X67CA0C12.0150X67CA0C22.0050X67CA0C22.0150X67CA0C22.0500X67CA0C32.0050X67CA0C32.0150X67CA0C32.0500X67CA0C42.0020X67CA0C42.0050X67CA0C52.0020X67CA0C52.0050X67CA0D40.0020X67CA0D40.0050X67CA0D40.0100X67CA0D40.0150X67CA0D40.0200X67CA0D50.0020X67CA0D50.0050X67CA0D50.0100X67CA0D50.0150X67CA0D50.0200X67CA0E41.0010X67CA0E41.0050X67CA0E41.0150X67CA0E41.0300X67CA0E41.0350X67CA0E41.0500X67CA0E61.0020X67CA0E61.0050X67CA0E61.0100X67CA0E61.0150X67CA0E81.0015X67CA0I41.0020X67CA0I41.0050X67CA0I41.0100X67CA0I51.0020X67CA0I51.0050X67CA0P00.0002X67CA0P00.0004
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