AWG 线规线径对照表


AWG(American wire gauge)美国线规,是一种区分导线直径的标准,又被称为 Brown & Sharpe线规。这种标准化线规系统于1857年起在美国开始使用。AWG前面的数值(如24AWG、26AWG)表示导线形成最后直径前所要经过的孔的数量,数值越大,导线经过孔的等级越高,导线的直径也就越小。粗导线具有更好的物理强度和更低的电阻,但是导线越粗,制作电缆需要的就越多,这会导致电缆更沉、更难以安装、价格也更贵。电缆设计的挑战在于使用尽可能小直径的导线(减小成本和安装复杂性),而同时保证在必要电压频率之下实现导线的最大容量

线号
AWG
公制线径
mm
英制线径
inch
截面积mm^2电阻值
Ω/km
正常载流量
A
最大载流量
A
4/0 *11.6840.4600107.22000.17423.2482.6
3/0 *10.4040.409685.01000.21335.5382.6
2/0 *9.2660.364867.43000.26266.2303.5
1/0 *8.2520.324953.49000.33211.1240.7
17.3480.289342.41000.42167.4190.9
26.5430.256733.62000.53132.7151.3
35.8270.229426.67000.66105.2120.0
45.1890.204321.15000.8483.595.2
54.6200.181916.77001.0666.275.5
64.1150.162013.30001.3352.559.9
73.6650.144310.55001.6841.647.5
83.2640.12858.37002.1133.037.7
92.9060.11446.63002.6726.229.8
102.5880.10195.26003.3620.823.7
112.3040.09074.17004.2416.518.8
122.0520.08083.33205.3113.114.9
131.8290.07202.62706.6910.411.8
141.6280.06412.07508.458.29.4
151.4500.05711.646010.66.57.4
161.2900.05081.318013.55.25.9
171.1510.04531.026016.34.14.7
181.0240.04030.810721.43.23.7
190.9120.03590.566726.92.62.9
200.8130.03200.518933.92.02.3
210.7240.02850.411642.71.61.9
220.6430.02530.324754.31.2801.460
230.5740.02260.258866.81.0221.165
240.5110.02010.204789.40.8080.921
250.4550.01790.16241060.6410.731
260.4040.01590.12811430.5060.577
270.3610.01420.10211680.4030.460
280.3200.01260.08042270.3180.362
290.2870.01130.06472890.2550.291
300.2540.01000.05073610.2000.228
310.2260.00890.04014300.1580.181
320.2030.00800.03165830.1280.146
330.1800.00710.02559440.1010.115
340.1600.00630.02019560.0790.091
350.1420.00560.016912000.0630.072
360.1270.00500.012715300.0500.057
370.1140.00450.009817880.0410.046
380.1020.00400.008124000.0320.036
390.0890.00350.006227400.0250.028
400.0790.00310.004940800.0190.022
410.0710.00280.004042640.0160.018
420.0640.00250.003263000.0130.014
430.0560.00220.002569360.0100.011
440.0510.00200.002091800.0080.009
450.0460.00180.0016102000.0060.007
460.0410.00160.0013163000.0050.006

* 4/0表示 0000,3/0表示 000,2/0表示 00,1/0表示 0

上表中的线径均指线的外径

单位换算:1 inch = 25.4 mm ;1 inch = 1000 mil(密尔)

正常载流值(A) = D外径(mil)^2/500 ; 最大载流值(A) = D外径(mil)^2/438.489