American Wire Gauge (AWG) is the standard way to denote wire size in North America. In AWG, the larger the number, the smaller the wire diameter and thickness. The largest standard size is 0000 AWG, and 40 AWG is the smallest standard size. It may also be called Brown & Sharpe wire gauge or simply the gauge of the wire.
AWG is for single-strand, solid, round, electrically conductive wire. It was first introduced in 1857 as a standard to replace the various measurements used by different manufacturers. Use of larger numbers denoting smaller wires is similar to Standard Wire Gauge, which is used in Britain. Most other countries use an international metric standard of wire cross-section in square millimeters (mm2) defined in International Electrotechnical Commission 60228.
AWG size does not include the size of the insulation protecting a wire.
0000 AWG is defined as 0.46 inches in diameter, and 36 AWG is defined as 0.005 inches in diameter. All other sizes are derived as logarithmic steps between these two defined sizes. There are 39 gauge steps between these sizes, and the ratio is 1-to-92 in diameter. Therefore, each AWG step is the 39th root of 92, or approximately 1.12293 times the change in diameter.
A smaller gauge (larger size) wire can safely conduct more electricity than a larger gauge (smaller size) wire. Decreasing the AWG size of a wire by three will double the cross-sectional area of a wire and double the amount of current it can carry. Changing the AWG size by 10 will change the cross-section by tenfold.
Since aluminum is not as good of a conductor as copper, for calculating how much current an aluminum wire can carry compared to a copper one, consider it as being 2-gauge AWG larger.
AWG
|
Diameter
|
Area
(mm2)
|
电阻值
(Ohm/km)
|
AWG
|
Diameter
|
Area
(mm2)
|
电阻值
(Ohm/km)
|
||
公制mm
|
英制inch
|
公制mm
|
英制inch
|
||||||
4/0
|
11.68
|
0.46
|
107.22
|
0.17
|
22
|
0.643
|
0.0253
|
0.3247
|
54.3
|
3/0
|
10.40
|
0.4096
|
85.01
|
0.21
|
23
|
0.574
|
0.0226
|
0.2588
|
66.8
|
2/0
|
9.27
|
0.3648
|
67.43
|
0.26
|
24
|
0.511
|
0.0201
|
0.2047
|
89.4
|
1/0
|
8.25
|
0.3249
|
53.49
|
0.33
|
25
|
0.44
|
0.0179
|
0.1624
|
106
|
1
|
7.35
|
0.2893
|
42.41
|
0.42
|
26
|
0.404
|
0.0159
|
0.1281
|
143
|
2
|
6.54
|
0.2576
|
33.62
|
0.53
|
27
|
0.361
|
0.0142
|
0.1021
|
168
|
3
|
5.83
|
0.2294
|
26.67
|
0.66
|
28
|
0.32
|
0.0126
|
0.0804
|
227
|
4
|
5.19
|
0.2043
|
21.15
|
0.84
|
29
|
0.287
|
0.0113
|
0.0647
|
289
|
5
|
4.62
|
0.1819
|
16.77
|
1.06
|
30
|
0.254
|
0.0100
|
0.0507
|
361
|
6
|
4.11
|
0.1620
|
13.30
|
1.33
|
31
|
0.226
|
0.0089
|
0.0401
|
430
|
7
|
3.67
|
0.1443
|
10.55
|
1.68
|
32
|
0.203
|
0.0080
|
0.0316
|
583
|
8
|
3.26
|
0.1285
|
8.37
|
2.11
|
33
|
0.18
|
0.0071
|
0.0255
|
944
|
9
|
2.91
|
0.1144
|
6.63
|
2.67
|
34
|
0.16
|
0.0063
|
0.0201
|
956
|
10
|
2.59
|
0.1019
|
5.26
|
3.36
|
35
|
0.142
|
0.0056
|
0.0169
|
1,200
|
11
|
2.30
|
0.0907
|
4.17
|
4.24
|
36
|
0.127
|
0.0050
|
0.0127
|
1,530
|
12
|
2.05
|
0.0808
|
3.332
|
5.31
|
37
|
0.114
|
0.0045
|
0.0098
|
1,788
|
13
|
1.82
|
0.0720
|
2.627
|
6.69
|
38
|
0.102
|
0.0040
|
0.0081
|
2,400
|
14
|
1.63
|
0.0641
|
2.075
|
8.45
|
39
|
0.089
|
0.0035
|
0.0062
|
2,740
|
15
|
1.45
|
0.0571
|
1.646
|
10.6
|
40
|
0.079
|
0.0031
|
0.0049
|
4,080
|
16
|
1.29
|
0.0508
|
1.318
|
13.5
|
41
|
0.071
|
0.0028
|
0.0040
|
4,264
|
17
|
1.15
|
0.0453
|
1.026
|
16.3
|
42
|
0.064
|
0.0025
|
0.0032
|
6,300
|
18
|
1.02
|
0.0403
|
0.8107
|
21.4
|
43
|
0.056
|
0.0022
|
0.0025
|
6,936
|
19
|
0.912
|
0.0359
|
0.5667
|
26.9
|
44
|
0.051
|
0.0020
|
0.0020
|
9,180
|
20
|
0.813
|
0.0320
|
0.5189
|
33.9
|
45
|
0.046
|
0.0018
|
0.0016
|
10,200
|
21
|
0.724
|
0.0285
|
0.4116
|
42.7
|
46
|
0.041
|
0.0016
|
0.0013
|
16,300
|
AWG | 外径 |
截面积
(mm2)
|
电阻值
(Ohm/km)
|
AWG | Diameter |
截面积
(mm2)
|
电阻值
(Ohm/km)
|
||
公制mm | 英制inch | 公制mm | 英制inch | ||||||
4/0 | 11.68 | 0.46 | 107.22 | 0.17 | 22 | 0.643 | 0.0253 | 0.3247 | 54.3 |
3/0 | 10.40 | 0.4096 | 85.01 | 0.21 | 23 | 0.574 | 0.0226 | 0.2588 | 66.8 |
2/0 | 9.27 | 0.3648 | 67.43 | 0.26 | 24 | 0.511 | 0.0201 | 0.2047 | 89.4 |
1/0 | 8.25 | 0.3249 | 53.49 | 0.33 | 25 | 0.44 | 0.0179 | 0.1624 | 106 |
1 | 7.35 | 0.2893 | 42.41 | 0.42 | 26 | 0.404 | 0.0159 | 0.1281 | 143 |
2 | 6.54 | 0.2576 | 33.62 | 0.53 | 27 | 0.361 | 0.0142 | 0.1021 | 168 |
3 | 5.83 | 0.2294 | 26.67 | 0.66 | 28 | 0.32 | 0.0126 | 0.0804 | 227 |
4 | 5.19 | 0.2043 | 21.15 | 0.84 | 29 | 0.287 | 0.0113 | 0.0647 | 289 |
5 | 4.62 | 0.1819 | 16.77 | 1.06 | 30 | 0.254 | 0.0100 | 0.0507 | 361 |
6 | 4.11 | 0.1620 | 13.30 | 1.33 | 31 | 0.226 | 0.0089 | 0.0401 | 430 |
7 | 3.67 | 0.1443 | 10.55 | 1.68 | 32 | 0.203 | 0.0080 | 0.0316 | 583 |
8 | 3.26 | 0.1285 | 8.37 | 2.11 | 33 | 0.18 | 0.0071 | 0.0255 | 944 |
9 | 2.91 | 0.1144 | 6.63 | 2.67 | 34 | 0.16 | 0.0063 | 0.0201 | 956 |
10 | 2.59 | 0.1019 | 5.26 | 3.36 | 35 | 0.142 | 0.0056 | 0.0169 | 1,200 |
11 | 2.30 | 0.0907 | 4.17 | 4.24 | 36 | 0.127 | 0.0050 | 0.0127 | 1,530 |
12 | 2.05 | 0.0808 | 3.332 | 5.31 | 37 | 0.114 | 0.0045 | 0.0098 | 1,788 |
13 | 1.82 | 0.0720 | 2.627 | 6.69 | 38 | 0.102 | 0.0040 | 0.0081 | 2,400 |
14 | 1.63 | 0.0641 | 2.075 | 8.45 | 39 | 0.089 | 0.0035 | 0.0062 | 2,740 |
15 | 1.45 | 0.0571 | 1.646 | 10.6 | 40 | 0.079 | 0.0031 | 0.0049 | 4,080 |
16 | 1.29 | 0.0508 | 1.318 | 13.5 | 41 | 0.071 | 0.0028 | 0.0040 | 4,264 |
17 | 1.15 | 0.0453 | 1.026 | 16.3 | 42 | 0.064 | 0.0025 | 0.0032 | 6,300 |
18 | 1.02 | 0.0403 | 0.8107 | 21.4 | 43 | 0.056 | 0.0022 | 0.0025 | 6,936 |
19 | 0.912 | 0.0359 | 0.5667 | 26.9 | 44 | 0.051 | 0.0020 | 0.0020 | 9,180 |
20 | 0.813 | 0.0320 | 0.5189 | 33.9 | 45 | 0.046 | 0.0018 | 0.0016 | 10,200 |
21 | 0.724 | 0.0285 | 0.4116 | 42.7 | 46 | 0.041 | 0.0016 | 0.0013 | 16,300 |
Post time: Aug-01-2022