Wire Resistance & Properties (AWG & Metric)
AWG |
Stranding |
Diameter |
Cross Sect. Area |
Circular Mils
|
D.C. Resistance (Ohms/1000 feet) |
Copper |
Aluminum |
in |
mm |
in² |
mm² |
@ 68°F (20°C) |
@ 167°F (75°C) |
@ 68°F (20°C) |
@ 167°F (75°C) |
20 |
solid |
0.032 |
0.81 |
0.001 |
0.52 |
1,020 |
10.150 |
11.953 |
- |
- |
20 |
10 |
0.037 |
0.94 |
0.001 |
0.69 |
1,020 |
10.900 |
12.836 |
- |
- |
19 |
solid |
0.036 |
0.91 |
0.001 |
0.65 |
1,200 |
8.051 |
9.481 |
- |
- |
18 |
solid |
0.040 |
1.02 |
0.001 |
0.82 |
1,620 |
6.390 |
7.770 |
- |
- |
18 |
7 |
0.046 |
1.17 |
0.002 |
1.07 |
1,620 |
6.538 |
7.950 |
- |
- |
16 |
solid |
0.051 |
1.29 |
0.002 |
1.31 |
2,580 |
4.021 |
4.890 |
- |
- |
14 |
solid |
0.064 |
1.63 |
0.003 |
2.08 |
4,110 |
2.525 |
3.070 |
- |
- |
12 |
solid |
0.081 |
2.06 |
0.005 |
3.32 |
6,530 |
1.587 |
1.930 |
- |
- |
10 |
solid |
0.102 |
2.59 |
0.008 |
5.27 |
10,380 |
0.995 |
1.210 |
- |
- |
8 |
solid |
0.128 |
3.25 |
0.013 |
8.30 |
16,510 |
0.628 |
0.764 |
- |
- |
6 |
7 |
0.184 |
4.67 |
0.027 |
17.16 |
26,240 |
0.404 |
0.491 |
0.661 |
0.808 |
4 |
7 |
0.232 |
5.89 |
0.042 |
27.27 |
41,740 |
0.253 |
0.308 |
0.416 |
0.508 |
2 |
7 |
0.292 |
7.42 |
0.067 |
43.20 |
66,360 |
0.160 |
0.194 |
0.261 |
0.319 |
1 |
19 |
0.332 |
8.43 |
0.087 |
55.85 |
83,690 |
0.127 |
0.154 |
0.207 |
0.253 |
0 |
19 |
0.372 |
9.45 |
0.109 |
70.12 |
105,600 |
0.100 |
0.122 |
0.165 |
0.201 |
00 |
19 |
0.418 |
10.62 |
0.137 |
88.53 |
133,100 |
0.080 |
0.097 |
0.130 |
0.159 |
000 |
19 |
0.470 |
11.94 |
0.173 |
111.93 |
167,800 |
0.063 |
0.077 |
0.103 |
0.126 |
0000 |
19 |
0.528 |
13.41 |
0.219 |
141.26 |
211,600 |
0.050 |
0.061 |
0.082 |
0.100 |
250MCM |
37 |
0.575 |
14.61 |
0.260 |
167.53 |
250,000 |
0.042 |
0.052 |
0.069 |
0.085 |
300MCM |
37 |
0.630 |
16.00 |
0.312 |
201.11 |
300,000 |
0.035 |
0.043 |
0.058 |
0.071 |
350MCM |
37 |
0.681 |
17.30 |
0.364 |
234.99 |
350,000 |
0.030 |
0.037 |
0.050 |
0.061 |
400MCM |
37 |
0.728 |
18.49 |
0.416 |
268.55 |
400,000 |
0.026 |
0.032 |
0.043 |
0.053 |
500MCM |
37 |
0.813 |
20.65 |
0.519 |
334.92 |
500,000 |
0.021 |
0.026 |
0.035 |
0.042 |
600MCM |
61 |
0.893 |
22.68 |
0.626 |
404.07 |
600,000 |
0.018 |
0.021 |
0.029 |
0.035 |
700MCM |
61 |
0.964 |
24.49 |
0.730 |
470.88 |
700,000 |
0.015 |
0.018 |
0.025 |
0.030 |
750MCM |
61 |
0.998 |
25.35 |
0.782 |
504.68 |
750,000 |
0.014 |
0.017 |
0.023 |
0.028 |
800MCM |
61 |
0.114 |
2.90 |
0.010 |
6.59 |
800,000 |
0.013 |
0.016 |
0.022 |
0.027 |
900MCM |
61 |
1.094 |
27.79 |
0.940 |
606.45 |
900,000 |
0.012 |
0.014 |
0.019 |
0.024 |
1000MCM |
61 |
1.152 |
29.26 |
1.042 |
672.45 |
1,000,000 |
0.011 |
0.013 |
0.017 |
0.021 |
Notes:
- MCM means Thousands of Circular Mils
- Stranding is the number of wire strands needed to make-up the whole conductor.
- Source: 2008 National Electrical Code.