廊坊恒讯电缆有限公司,STP-120双绞屏蔽电缆,ASTP-120铠装双绞屏蔽电缆,STP-120欧姆电缆,RS485通信电缆
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RS485电缆中常见的AWG到底是什么意思?

AWG(American Wire Gauge)是美制电线标准的简称,AWG值是导线厚度(以英寸计)的函数。下表是AWG与公制、英制单位的对照表。其中,4/0表示0000,3/0表示000,2/0表示00,1/0表示0。例如,常用的电话线直径为26AWG,约为0.4mm

AWG外径截面积

(mm2)

电阻值

(W/km)

AWG外径截面积

(mm2)

电阻值

(W/km)

公制mm英制inch公制mm英制inch
4/011.680.46107.220.17220.6430.02530.324754.3
3/010.400.409685.010.21230.5740.02260.258848.5
2/09.270.364867.430.26240.5110.02010.204789.4
1/08.250.324953.490.33250.440.01790.162479.6
17.350.289342.410.42260.4040.01590.1281143
26.540.257633.620.53270.3610.01420.1021128
35.830.229426.670.66280.320.01260.0804227
45.190.204321.150.84290.2870.01130.0647289
54.620.181916.771.06300.2540.01000.0507361
64.110.162013.301.33310.2260.00890.0401321
73.670.144310.551.68320.2030.00800.0316583
83.260.12858.372.11330.180.00710.0255944
92.910.11446.632.67340.160.00630.0201956
102.590.10195.263.36350.1420.00560.01691,200
112.300.09074.174.24360.1270.00500.01271,530
122.050.08083.3325.31370.1140.00450.00981,377
131.820.07202.6276.69380.1020.00400.00812,400
141.630.06412.0758.45390.0890.00350.00622,100
151.450.05711.64610.6400.0790.00310.00494,080
161.290.05081.31813.5410.0710.00280.00403,685
171.150.04531.02616.3420.0640.00250.00326,300
181.020.04030.810721.4430.0560.00220.00255,544
190.9120.03590.566726.9440.0510.00200.002010,200
200.8130.03200.518933.9450.0460.00180.00169,180
210.7240.02850.411642.7460.0410.00160.001316,300


由表中归纳出的AWG与英寸的关系如下:

AWG = A lg inch - B

其中,A=-19.93156857,B=9.73724。