Copper Wire Resistance Values

(4 AWG thru 25 AWG)


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Bare Copper

( 4 AWG thru 25 AWG )

Size
(AWG)
Diameter
(inches)
Resistance (ohms per 1000 feet @ 20C)
100% IACS 101.5% IACS
  Minimum Nominal Maximum Minimum Nominal Maximum Minimum Nominal Maximum
4 .2023 .2043 .2063 .2437 .2485 .2534 .2401 .2448 .2497
5 .1801 .1819 .1837 .3073 .3134 .3197 .3028 .3088 .3150
6 .1604 .1620 .1636 .3875 .3952 .4031 .3818 .3893 .3971
7 .1429 .1443 .1457 .4885 .4981 .5079 .4813 .4907 .5004
8 .1272 .1285 .1298 .6156 .6281 .6410 .6065 .6188 .6315
9 .1133 .1144 .1155 .7774 .7924 .8079 .7659 .7807 .7960
10 .1009 .1019 .1029 .9795 .9988 1.019 .9650 .9840 1.0036
11 .0898 .0907 .0916 1.236 1.261 1.286 1.218 1.242 1.267
12 .0800 .0808 .0816 1.558 1.589 1.620 1.535 1.565 1.597
13 .0713 .0720 .0727 1.962 2.001 2.040 1.933 1.971 2.010
14 .0635 .0641 .0647 2.477 2.524 2.572 2.441 2.487 2.534
15 .0565 .0571 .0577 3.115 3.181 3.249 3.069 3.134 3.201
16 .0503 .0508 .0513 3.941 4.019 4.099 3.883 3.959 4.038
17 .0448 .0453 .0458 4.944 5.054 5.167 4.871 4.979 5.091
18 .0399 .0403 .0407 6.261 6.386 6.514 6.168 6.291 6.418
19 .0355 .0359 .0363 7.971 8.047 8.229 7.754 7.928 8.108
20 .0317 .0320 .0323 9.941 10.13 10.32 9.79 9.98 10.17
21 .0282 .0285 .0288 12.50 12.77 13.04 12.32 12.58 12.85
22 .0250 .0253 .0256 15.82 16.20 16.59 15.59 15.96 16.35
23 .0224 .0226 .0228 19.95 20.31 20.67 19.66 20.00 20.36
24 .0199 .0201 .0203 25.17 25.67 26.19 24.74 25.29 25.80
25 .0177 .0179 .0181 31.66 32.37 33.10 31.19 31.89 32.61
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