新增中国常用mm2线规对照表(GB/T 3956-2008)，含直径/截面/电阻/AWG对照

2026-08-28 16:09:37 +08:00
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+标称截面mm2,等效实心直径mm,Class1/2铜电阻_20C_Ohm_per_km,Class5软铜电阻_20C_Ohm_per_km,约等AWG,常见用途
+0.5,0.798,36.0,39.0,20,信号线、弱电控制线、屏蔽引线
+0.75,0.977,24.5,26.0,18,控制线、灯线、二次回路
+1.0,1.128,18.1,19.5,17,控制回路、仪器仪表引线
+1.5,1.382,12.1,13.3,15,环路线圈本体、照明支路
+2.5,1.784,7.41,7.98,13,环路线圈本体、插座回路、道闸电源
+4,2.257,4.61,4.95,11,道闸/电机主回路、空调回路
+6,2.764,3.08,3.3,9,道闸电机、小功率设备进线
+10,3.568,1.83,1.91,7,设备电源进线、充电桩支路
+16,4.514,1.15,1.21,5,配电支路、充电桩回路
+25,5.642,0.727,0.78,3,配电干路、进线
+35,6.676,0.524,0.554,2,总进线、充电桩干线
+50,7.979,0.387,0.386,1/0,总进线、母排连接
+70,9.441,0.268,0.272,2/0,大功率进线
+95,10.998,0.193,0.206,3/0,低压出线、大功率回路
+120,12.361,0.153,0.161,4/0,低压主进线
+150,13.820,0.124,0.129,—,低压主进线
+185,15.348,0.0991,0.106,—,低压主进线
+240,17.481,0.0754,0.0801,—,低压主进线、密集型母线
+300,19.544,0.0601,0.0641,—,低压主进线、母线槽
+400,22.568,0.047,0.0486,—,大截面电缆、母线
+500,25.231,0.0366,0.0384,—,大截面电缆、母线
+630,28.322,0.0287,0.0287,—,大截面电缆、母线