Appendix A
Impedance Tables for Lines, Transformers, and Underground Cables
Characteristics of Copper Conductors, Hard-Drawn, 97.3% Conductivity
Size of Conductor Circular Mils |
AWC or B & S |
Number of Strands |
Diameter of Individual Strands (in.) |
Outside Diameter (in.) |
Breaking Strength (lb) |
Weight (Ib/mi) |
Approx. Current Carrying Capacitya (amps) |
Geometric Mean Radius at 60 Cycles (ft) |
ra Resistance (Ω/Conductor/mi) |
Xa Inductive Reactance (Ω/Conductor/mi) at 1 ft Spacing |
X'a Shunt Capacitive Reactance (MΩ · mi/Conductor) at 1 ft Spacing) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
25°C (77°F) |
50°C (122°F) |
|||||||||||||||||||||
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
|||||||||
1,000,000 |
— |
37 |
0.1644 |
1.151 |
43,830 |
16,300 |
1300 |
0.0368 |
0.0585 |
0.0594 |
0.0620 |
0.0634 |
0.0640 |
0.0648 |
0.0672 |
0.0685 |
0.1666 |
0.333 |
0.400 |
0.216 |
0.1081 |
0.0901 |
900,000 |
— |
37 |
0.1560 |
1.092 |
39,610 |
14,670 |
1220 |
0.0349 |
0.0650 |
0.0658 |
0.0682 |
0.0695 |
0.0711 |
0.0718 |
0.0740 |
0.0752 |
0.1693 |
0.339 |
0.406 |
0.220 |
0.1100 |
0.0916 |
800,000 |
— |
37 |
0.1470 |
1.029 |
35,120 |
13,040 |
1130 |
0.0329 |
0.0731 |
0.0739 |
0.0760 |
0.0772 |
0.0800 |
0.0808 |
0.0826 |
0.0837 |
0.1722 |
0.344 |
0.413 |
0.224 |
0.1121 |
0.0934 |
750,000 |
— |
37 |
0.1424 |
0.997 |
33,400 |
12,230 |
1090 |
0.0319 |
0.0780 |
0.0787 |
0.0807 |
0.6818 |
0.0853 |
0.0859 |
0.0878 |
0.0888 |
0.1739 |
0.348 |
0.417 |
10.225 |
0.1132 |
0.0943 |
700,000 |
— |
37 |
0.1375 |
0.963 |
31,170 |
11,410 |
1040 |
0.0306 |
0.0836 |
0.0842 |
0.0661 |
0.0671 |
0.0914 |
0.0920 |
0.0937 |
0.0947 |
0.1789 |
0.352 |
0.422 |
0.229 |
0.1145 |
0.0954 |
500,000 |
— |
37 |
0.1273 |
0.891 |
27,020 |
9,781 |
940 |
0.0285 |
0.0975 |
0.0981 |
0.0997 |
0.1006 |
0.1066 |
0.1071 |
0.1086 |
0.1095 |
0.1799 |
0.360 |
0.432 |
0.235 |
0.1173 |
0.0977 |
500,000 |
— |
37 |
0.1162 |
0.814 |
22,610 |
8,161 |
840 |
0.0260 |
0.1170 |
0.1175 |
0.1188 |
0.1196 |
0.1280 |
0.1283 |
0.1296 |
0.1303 |
0.1845 |
0.369 |
0.443 |
0.241 |
0.1206 |
0.1004 |
500,000 |
— |
19 |
0.1622 |
0.811 |
21,590 |
8,161 |
840 |
0.0256 |
0.1170 |
0.1175 |
0.1188 |
0.1196 |
0.1280 |
0.1283 |
0.1296 |
0.1303 |
0.1853 |
0.371 |
0.445 |
0.241 |
0.1206 |
0.1006 |
450,000 |
— |
19 |
0.1539 |
0.770 |
19,750 |
7,336 |
780 |
0.0243 |
0.1300 |
0.1304 |
0.1316 |
0.1323 |
0.1422 |
0.1426 |
0.1437 |
0.1443 |
0.1879 |
0.376 |
0.451 |
0.245 |
0.1224 |
0.1020 |
400,000 |
— |
19 |
0.1451 |
0.726 |
17,560 |
6,521 |
730 |
0.0229 |
0.1462 |
0.1466 |
0.1477 |
0.1484 |
0.1600 |
0.1603 |
0.1613 |
0.1519 |
0.1909 |
0.382 |
0.458 |
0.249 |
0.1245 |
0.1038 |
350,000 |
— |
19 |
0.1357 |
0.679 |
16,890 |
5,706 |
670 |
0.0214 |
0.1671 |
0.1675 |
0.1684 |
0.1690 |
0.1828 |
0.1831 |
0.1840 |
0.1845 |
0.1943 |
0.389 |
0.466 |
0.254 |
0.1269 |
0.1058 |
350,000 |
— |
12 |
0.1708 |
0.710 |
16,140 |
5,706 |
670 |
0.0225 |
0.1671 |
0.1675 |
0.1684 |
0.1690 |
0.1828 |
0.1831 |
0.1840 |
0.1845 |
0.1918 |
0.384 |
0.460 |
0.251 |
0.1253 |
0.1044 |
300,000 |
— |
19 |
0.1257 |
0.629 |
13,510 |
4,891 |
610 |
0.01987 |
0.1950 |
0.1953 |
0.1961 |
0.1966 |
0.213 |
0.214 |
0.214 |
0.215 |
0.1982 |
0.396 |
0.476 |
0.259 |
0.1296 |
0.1060 |
300,000 |
— |
12 |
0.1581 |
0.657 |
13,170 |
4,891 |
610 |
0.0208 |
0.1950 |
0.1953 |
0.1961 |
0.1966 |
0.213 |
0.214 |
0.214 |
0.215 |
0.1957 |
0.392 |
0.470 |
0.256 |
0.1281 |
0.1068 |
250,000 |
— |
19 |
0.1147 |
0.574 |
11,360 |
4,076 |
540 |
0.01813 |
0.234 |
0.234 |
0.235 |
0.236 |
0.256 |
0.256 |
0.257 |
0.257 |
0.203 |
0.406 |
0.487 |
0.266 |
0.1329 |
0.1108 |
250,000 |
— |
12 |
0.1443 |
0.600 |
11,130 |
4,076 |
540 |
0.01902 |
0.234 |
0.234 |
0.235 |
0.236 |
0.256 |
0.256 |
0.257 |
0.257 |
0.200 |
0.401 |
0.481 |
0.263 |
0.1313 |
0.1094 |
211,600 |
4/0 |
19 |
0.1055 |
0.528 |
9,617 |
3,450 |
480 |
0.01668 |
0.276 |
0.277 |
0.277 |
0.278 |
0.302 |
0.303 |
0.303 |
0.303 |
0.207 |
0.414 |
0.497 |
0.272 |
0.1359 |
0.1132 |
211,600 |
4/0 |
12 |
0.1328 |
0.552 |
9,483 |
3,450 |
490 |
0.01750 |
0.276 |
0.277 |
0.277 |
0.278 |
0.302 |
0.303 |
0.303 |
0.303 |
0.208 |
0.409 |
0.491 |
0.269 |
0.1343 |
0.1119 |
211,600 |
4/0 |
7 |
0.1739 |
0.522 |
9,154 |
3,450 |
480 |
0.01579 |
0.276 |
0.277 |
0.277 |
0.278 |
0.302 |
0.303 |
0.303 |
0.303 |
0.210 |
0.420 |
0.603 |
0.273 |
0.1363 |
0.1136 |
167,800 |
3/0 |
12 |
0.1183 |
0.492 |
7,556 |
2,736 |
420 |
0.01569 |
0.349 |
0.349 |
0.349 |
0.350 |
0.381 |
0.381 |
0.382 |
0.382 |
0.210 |
0.421 |
0.606 |
0.277 |
0.1384 |
0.1153 |
167,800 |
3/0 |
7 |
0.1548 |
0.464 |
7,366 |
2,736 |
420 |
0.01404 |
0.349 |
0.349 |
0.349 |
0.350 |
0.381 |
0.381 |
0.382 |
0.382 |
0.216 |
0.431 |
0.518 |
0.281 |
0.1405 |
0.1171 |
133,100 |
2/0 |
7 |
0.1379 |
0.414 |
5,926 |
2,170 |
360 |
0.01252 |
0.440 |
0.440 |
0.440 |
0.440 |
0.481 |
0.481 |
0.481 |
0.481 |
0.222 |
0.443 |
0.532 |
0.289 |
0.1445 |
0.1205 |
106,600 |
1/0 |
7 |
0.1228 |
0.368 |
4,752 |
1,720 |
310 |
0.01113 |
0.555 |
0.555 |
0.555 |
0.555 |
0.606 |
0.607 |
0.607 |
0.607 |
0.227 |
0.455 |
0.546 |
0.298 |
0.1488 |
0.1240 |
83,690 |
1 |
7 |
0.1093 |
0.328 |
3,804 |
1,364 |
270 |
0.00992 |
0.599 |
0.699 |
0.699 |
0.699 |
0.766 |
0.233 |
0.467 |
0.560 |
0.306 |
0.1528 |
0.1274 |
|||
63,690 |
1 |
3 |
0.1670 |
0.360 |
3,620 |
1,351 |
270 |
0.01016 |
0.692 |
0.692 |
0.692 |
0.692 |
0.757 |
0.232 |
0.464 |
0.557 |
0.299 |
0.1495 |
0.1246 |
|||
66,370 |
2 |
7 |
0.0974 |
0.292 |
3,045 |
1,082 |
230 |
0.00883 |
0.881 |
0.882 |
0.882 |
0.882 |
0.964 |
0.239 |
0.478 |
0.574 |
0.314 |
0.1570 |
0.1308 |
|||
66,370 |
2 |
3 |
0.1487 |
0.320 |
2,913 |
1,071 |
240 |
0.00903 |
0.873 |
0.956 |
0.238 |
0.476 |
0.571 |
0.307 |
0.1637 |
0.1281 |
||||||
66,370 |
2 |
1 |
— |
0.258 |
3,003 |
1,061 |
220 |
0.00836 |
0.884 |
0.946 |
0.242 |
0.484 |
0.581 |
0.323 |
0.1614 |
0.1346 |
||||||
52,630 |
3 |
7 |
0.0867 |
0.260 |
2,433 |
858 |
200 |
0.00787 |
1.112 |
1.216 |
0.245 |
0.490 |
0.588 |
0.322 |
0.1611 |
0.1343 |
||||||
52,630 |
3 |
3 |
0.1325 |
0.286 |
2,359 |
850 |
200 |
0.00805 |
1.101 |
1.204 |
0.244 |
0.488 |
0.585 |
0.316 |
0.1578 |
0.1315 |
||||||
52,630 |
3 |
1 |
— |
0.229 |
2,439 |
841 |
190 |
0.00745 |
1.090 |
Same as DC |
1.192 |
Same as DC |
0.248 |
0.496 |
0.595 |
0.331 |
0.1656 |
0.1380 |
||||
41,740 |
4 |
3 |
0.1180 |
0.254 |
1,879 |
674 |
180 |
0.00717 |
1.388 |
1.518 |
0.250 |
0.499 |
0.599 |
0.324 |
0.1619 |
0.1349 |
||||||
41,740 |
4 |
1 |
— |
0.204 |
1,970 |
667 |
170 |
0.00663 |
1.374 |
1.503 |
0.264 |
0.507 |
0.609 |
0.339 |
0.1697 |
0.1416 |
||||||
33,100 |
5 |
3 |
0.1050 |
0.226 |
1,605 |
534 |
180 |
0.00638 |
1.750 |
1.914 |
0.256 |
0.511 |
0.613 |
0.332 |
0.1661 |
0.1384 |
||||||
33,100 |
5 |
1 |
— |
0.1819 |
1,591 |
529 |
140 |
0.00590 |
1.733 |
1.895 |
0.260 |
0.519 |
0.623 |
0.348 |
0.1738 |
0.1449 |
||||||
26,250 |
6 |
3 |
0.0935 |
0.201 |
1,205 |
424 |
130 |
0.00568 |
2.21 |
2.41 |
0.262 |
0.523 |
0.628 |
0.341 |
0.1703 |
0.1419 |
||||||
26,250 |
6 |
1 |
— |
0.1620 |
1,280 |
420 |
120 |
0.00526 |
2.18 |
2.39 |
0.265 |
0.531 |
0.637 |
0.356 |
0.1779 |
0.1483 |
||||||
20,820 |
7 |
1 |
— |
0.1443 |
1,030 |
333 |
110 |
0.00468 |
2.75 |
3.01 |
0.271 |
0.542 |
0.651 |
0.364 |
0.1821 |
0.1517 |
||||||
16,510 |
8 |
1 |
— |
0.1286 |
826 |
264 |
90 |
0.00417 |
3.47 |
3.80 |
0.277 |
0.564 |
0.665 |
0.372 |
0.1862 |
0.1652 |
||||||
Source: Westinghouse Electric Corporation, Electric Utility Engineering Reference Book—Distribution Systems, East Pittsburgh, PA, 1965.
a For conductor at 75°C, air at 25°C, wind 1.4 mi/h (2 ft/s), frequency = 60 cycles.
Characteristics of Anaconda Hollow Copper Conductors
Design Number |
Size of Conductor Circular Mils or AWG |
Wires Number |
Diameter (in.) |
Outside Diameter (in.) |
Breaking strain (lb) |
Weight (lb/mi) |
Geometric Mean Radius at 60 Cycles (ft) |
Approx. Current Carrying Capacity (amps)a |
ra Resistance (Ω/Conductor/mi) |
Xa Inductive Reactance |
X'a Shunt Capacitive Reactance |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
25°C (77°F) |
50°C (122°F) |
|||||||||||||||||
DC 25 Cycles |
50 Cycles 60 Cycles |
DC 25 Cycles |
50 Cycles 60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
|||||||||
966 |
890,500 |
28 |
0.1610 |
1.650 |
36,000 |
15,085 |
0.0612 |
1395 |
0.0671 |
0.0676 |
0.0734 |
0.0739 |
0.1412 |
0.282 |
0.339 |
0.1907 |
0.0953 |
0.0794 |
96R 1 |
750,000 |
42 |
0.1296 |
1.155 |
34,200 |
12,345 |
0.0408 |
1160 |
0.0786 |
0.0791 |
0.0860 |
0.0865 |
0.1617 |
0.323 |
0.388 |
0.216 |
0.1080 |
0.0900 |
939 |
650,000 |
50 |
0.1097 |
1.126 |
29,500 |
10,761 |
0.0406 |
1060 |
0.0909 |
0.0915 |
0.0994 |
0.1001 |
0.1621 |
0.324 |
0.389 |
0.218 |
0.1089 |
0.0908 |
360R 1 |
600,000 |
50 |
0.1053 |
1.007 |
27,500 |
9,905 |
0.0387 |
1020 |
0.0984 |
0.0991 |
0.1077 |
0.1084 |
0.1644 |
0.329 |
0.395 |
0.221 |
0.1105 |
0.0921 |
938 |
550,000 |
50 |
0.1009 |
1.036 |
25,200 |
9,103 |
0.0373 |
960 |
0.1076 |
0.1081 |
0.1177 |
0.1183 |
0.1663 |
0.333 |
0.399 |
0.224 |
0.1119 |
0.0932 |
4R 5 |
510,000 |
50 |
0.0970 |
1.000 |
22,700 |
8,485 |
0.0360 |
910 |
0.1173 |
0.1178 |
0.1283 |
0.1289 |
0.1681 |
0.336 |
0.404 |
0.226 |
0.1131 |
0.0943 |
892R 3 |
500,000 |
18 |
0.1558 |
1.080 |
21,400 |
8,263 |
0.0394 |
900 |
0.1178 |
0.1184 |
0.1289 |
0.1296 |
0.1630 |
0.326 |
0.391 |
0.221 |
0.1164 |
0.0920 |
933 |
450,000 |
21 |
0.1353 |
1.074 |
19,300 |
7,476 |
0.0398 |
850 |
0.1319 |
0.1324 |
0.1443 |
0.1448 |
0.1630 |
0.326 |
0.391 |
0.221 |
0.1106 |
0.0922 |
924 |
400,000 |
21 |
0.1227 |
1.014 |
17,200 |
6,642 |
0.0376 |
810 |
0.1485 |
0.1491 |
0.1624 |
0.1631 |
0.1658 |
0.332 |
0.398 |
0.225 |
0.1126 |
0.0939 |
925R 1 |
380,500 |
22 |
0.1211 |
1.003 |
16,300 |
6,331 |
0.0373 |
780 |
0.1565 |
0.1572 |
0.1712 |
0.1719 |
0.1663 |
0.333 |
0.399 |
0.226 |
0.1130 |
0.0942 |
565R 1 |
350,000 |
21 |
0.1196 |
0.950 |
15,100 |
5,813 |
0.0353 |
750 |
0.1695 |
0.1700 |
0.1854 |
0.1860 |
0.1691 |
0.338 |
0.406 |
0.230 |
0.1150 |
0.0958 |
936 |
350,000 |
15 |
0.1444 |
0.860 |
15,400 |
5,776 |
0.0311 |
740 |
0.1690 |
0.1695 |
0.1849 |
0.1854 |
0.1754 |
0.351 |
0.421 |
0.237 |
0.1185 |
0.0988 |
378R 1 |
350,000 |
30 |
0.1059 |
0.736 |
16,100 |
5,739 |
0.0253 |
700 |
0.1685 |
0.1690 |
0.1843 |
0.1849 |
0.1860 |
0.372 |
0.446 |
0.248 |
0.1241 |
0.1034 |
954 |
321,000 |
22 |
0.1113 |
0.920 |
13,850 |
5,343 |
0.0340 |
700 |
0.1851 |
0.1856 |
0.202 |
0.203 |
0.1710 |
0.342 |
0.410 |
0.232 |
0.1161 |
0.0968 |
935 |
300,000 |
18 |
0.1205 |
0.839 |
13,100 |
4,984 |
0.0307 |
670 |
0.1980 |
0.1985 |
0.216 |
0.217 |
0.1761 |
0.352 |
0.423 |
0.239 |
0.1194 |
0.0995 |
903R 1 |
300,000 |
15 |
0.1338 |
0.797 |
13,200 |
4,953 |
0.0289 |
660 |
0.1969 |
0.1975 |
0.215 |
0.216 |
0.1793 |
0.359 |
0.430 |
0.242 |
0.1212 |
0.1010 |
178R 2 |
300,000 |
12 |
0.1507 |
0.750 |
13,050 |
4,937 |
0.0266 |
650 |
0.1964 |
0.1969 |
0.215 |
0.216 |
0.1833 |
0.367 |
0.440 |
0.247 |
0.1234 |
0.1028 |
926 |
250,000 |
18 |
0.1100 |
0.766 |
10,950 |
4,155 |
0.0279 |
600 |
0.238 |
0.239 |
0.260 |
0.261 |
0.1810 |
0.362 |
0.434 |
0.245 |
0.1226 |
0.1022 |
915R 1 |
250,000 |
15 |
0.1214 |
0.725 |
11,000 |
4,148 |
0.0266 |
590 |
0.237 |
0.238 |
0.259 |
0.260 |
0.1834 |
0.367 |
0.440 |
0.249 |
0.1246 |
0.1038 |
24R 1 |
250,000 |
12 |
0.1368 |
0.683 |
11,000 |
4,133 |
0.0245 |
580 |
0.237 |
0.238 |
0.259 |
0.260 |
0.1876 |
0.375 |
0.450 |
0.253 |
0.1267 |
0.1066 |
923 |
4/0 |
18 |
0.1005 |
0.700 |
9,300 |
3,521 |
0.0255 |
530 |
0.281 |
0.282 |
0.307 |
0.308 |
0.1855 |
0.371 |
0.445 |
0.252 |
0.1258 |
0.1049 |
922 |
4/0 |
15 |
0.1109 |
0.663 |
9,300 |
3,510 |
0.0238 |
520 |
0.281 |
0.282 |
0.307 |
0.308 |
0.1889 |
0.378 |
0.453 |
0.256 |
0.1278 |
0.1065 |
50R 2 |
4/0 |
14 |
0.1152 |
0.650 |
9,300 |
3,510 |
0.0234 |
520 |
0.280 |
0.281 |
0.306 |
0.307 |
0.1898 |
0.380 |
0.455 |
0.257 |
0.1285 |
0.1071 |
158R 1 |
3/0 |
16 |
0.0961 |
0.606 |
7,500 |
2,785 |
0.0221 |
460 |
0.354 |
0.355 |
0.387 |
0.388 |
0.1928 |
0.386 |
0.463 |
0.262 |
0.1310 |
0.1091 |
495R 1 |
3/0 |
15 |
0.0996 |
0.595 |
7,600 |
2,785 |
0.0214 |
460 |
0.353 |
0.354 |
0.386 |
0.387 |
0.1943 |
0.389 |
0.466 |
0.263 |
0.1316 |
0.1097 |
570R 2 |
3/0 |
12 |
0.1123 |
0.560 |
7,600 |
2,772 |
0.0201 |
450 |
0.352 |
0.353 |
0.385 |
0.386 |
0.1976 |
0.395 |
0.474 |
0.268 |
0.1338 |
0.1115 |
909R 2 |
2/0 |
15 |
0.0880 |
0.530 |
5,950 |
2,213 |
0.0191 |
370 |
0.446 |
0.446 |
0.487 |
0.487 |
0.200 |
0.400 |
0.481 |
0.271 |
0.1357 |
0.1131 |
412R 2 |
2/0 |
14 |
0.0913 |
0.515 |
6,000 |
2,207 |
0.0184 |
370 |
0.446 |
0.446 |
0.487 |
0.487 |
0.202 |
0.404 |
0.485 |
0.274 |
0.1368 |
0.1140 |
937 |
2/0 |
13 |
0.0950 |
0.505 |
6,000 |
2,203 |
0.0181 |
370 |
0.446 |
0.446 |
0.487 |
0.487 |
0.203 |
0.406 |
0.487 |
0.275 |
0.1375 |
0.1146 |
930 |
125,600 |
14 |
0.0885 |
0.500 |
5,650 |
2,083 |
0.0180 |
360 |
0.473 |
0.473 |
0.517 |
0.517 |
0.203 |
0.406 |
0.487 |
0.276 |
0.1378 |
0.1149 |
934 |
121,300 |
15 |
0.0836 |
0.500 |
5,400 |
2,015 |
0.0179 |
350 |
0.491 |
0.491 |
0.537 |
0.537 |
0.203 |
0.407 |
0.488 |
0.276 |
0.1378 |
0.1149 |
901 |
119,400 |
12 |
0.0936 |
0.470 |
5,300 |
1,979 |
0.0165 |
340 |
0.507 |
0.507 |
0.555 |
0.555 |
0.207 |
0.415 |
0.498 |
0.280 |
0.1400 |
0.1167 |
Source: Westinghouse Electric Corporation, Electric Utility Engineering Reference Book—Distribution Systems, East Pittsburgh, PA, 1965.
a For conductor at 75°C, air at 25°C, wind 1.4 mi/h (2 ft/s), frequency = 60 cycles, average tarnished surface.
Characteristics of General Cable Type HH Hollow Copper Conductors
Conductor Size Circular Mils or AWG |
Outsidea Diameter (in.) |
Wall Thickness (in.) |
Weight (Ib/mi) |
Breaking Strength (lb) |
Geometric Mean Radius (ft) |
Approx. Current Carrying Capacityb (amps) |
ra Resistance (Ω/Conductor/mi) |
Xa Inductive Reactance |
X'a Shunt Capacitive Reactance |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
25°C (77°F) |
50°C (122°F) |
|||||||||||||||||||
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
|||||||
1,000,000 |
2.103 |
0.150c |
16,160 |
43,190 |
0.0833 |
1620 |
0.0576 |
0.0576 |
0.0577 |
0.0577 |
0.0630 |
0.0630 |
0.0631 |
0.0631 |
0.1257 |
0.251 |
0.302 |
0.1734 |
0.0867 |
0.0722 |
950,000 |
2.035 |
0.147c |
15,350 |
41,030 |
0.0805 |
1565 |
0.0606 |
0.0606 |
0.0607 |
0.0607 |
0.0663 |
0.0664 |
0.0664 |
0.0664 |
0.1274 |
0.255 |
0.306 |
0.1757 |
0.0879 |
0.0732 |
900,000 |
1.966 |
0.144c |
14,540 |
38,870 |
0.0778 |
1505 |
0.0640 |
0.0640 |
0.0641 |
0.0641 |
0.0700 |
0.0701 |
0.0701 |
0.0701 |
0.1291 |
0.258 |
0.310 |
0.1782 |
0.0891 |
0.0742 |
850,000 |
1.901 |
0.140c |
13,730 |
36,710 |
0.0751 |
1450 |
0.0677 |
0.0678 |
0.0678 |
0.0678 |
0.0741 |
0.0742 |
0.0742 |
0.0742 |
0.1309 |
0.262 |
0.314 |
0.1805 |
0.0903 |
0.0752 |
800,000 |
1.820 |
0.137c |
12,920 |
34,550 |
0.0722 |
1390 |
0.0720 |
0.0720 |
0.0720 |
0.0721 |
0.0788 |
0.0788 |
0.0788 |
0.0788 |
0.1329 |
0.266 |
0.319 |
0.1833 |
0.0917 |
0.0764 |
790,000 |
1.650 |
0.131d |
12,760 |
34,120 |
0.0646 |
1335 |
0.0729 |
0.0729 |
0.0730 |
0.0730 |
0.0797 |
0.0798 |
0.0799 |
0.0799 |
0.1385 |
0.277 |
0.332 |
0.1906 |
0.0953 |
0.0794 |
750,000 |
1.750 |
0.133c |
12,120 |
32,390 |
0.0691 |
1325 |
0.0768 |
0.0768 |
0.0768 |
0.0769 |
0.0840 |
0.0840 |
0.0841 |
0.0841 |
0.1351 |
0.270 |
0.324 |
0.1864 |
0.0932 |
0.0777 |
700,000 |
1.686 |
0.130c |
11,310 |
30,230 |
0.0665 |
1265 |
0.0822 |
0.0823 |
0.0823 |
0.0823 |
0.0900 |
0.0900 |
0.0901 |
0.0901 |
0.1370 |
0.274 |
0.329 |
0.1891 |
0.0945 |
0.0788 |
650,000 |
1.610 |
0.126c |
10,500 |
28,070 |
0.0635 |
1200 |
0.0886 |
0.0886 |
0.0886 |
0.0887 |
0.0969 |
0.0970 |
0.0970 |
0.0970 |
0.1394 |
0.279 |
0.335 |
0.1924 |
0.0962 |
0.0802 |
600,000 |
1.558 |
0.123c |
9,692 |
25,910 |
0.0615 |
1140 |
0.0959 |
0.0960 |
0.0960 |
0.0960 |
0.1050 |
0.1051 |
0.1051 |
0.1051 |
0.1410 |
0.282 |
0.338 |
0.1947 |
0.0974 |
0.0811 |
550,000 |
1.478 |
0.119c |
8,884 |
23,750 |
0.0583 |
1075 |
0.1047 |
0.1048 |
0.1048 |
0.1048 |
0.1146 |
0.1146 |
0.1147 |
0.1147 |
0.1437 |
0.287 |
0.345 |
0.1985 |
0.0992 |
0.0827 |
512,000 |
1.400 |
0.115c |
8,270 |
22,110 |
0.0551 |
1020 |
0.1124 |
0.1125 |
0.1125 |
0.1125 |
0.1230 |
0.1230 |
0.1231 |
0.1231 |
0.1466 |
0.293 |
0.352 |
0.202 |
0.1012 |
0.0843 |
500,000 |
1.390 |
0.115c |
8,076 |
21,590 |
0.0547 |
1005 |
0.1151 |
0.1151 |
0.1152 |
0.1152 |
0.1259 |
0.1260 |
0.1260 |
0.1260 |
0.1469 |
0.294 |
0.353 |
0.203 |
0.1014 |
0.0845 |
500,000 |
1.268 |
0.109d |
8,074 |
21,590 |
0.0494 |
978 |
0.1151 |
0.1152 |
0.1152 |
0.1152 |
0.1259 |
0.1260 |
0.1260 |
0.1261 |
0.1521 |
0.304 |
0.365 |
0.209 |
0.1047 |
0.0872 |
500,000 |
1.100 |
0.130d |
8,068 |
21,590 |
0.0420 |
937 |
0.1150 |
0.1151 |
0.1152 |
0.1153 |
0.1258 |
0.1259 |
0.1260 |
0.1260 |
0.1603 |
0.321 |
0.385 |
0.219 |
0.1098 |
0.0915 |
500,000 |
1.020 |
0.144d |
8,063 |
21,590 |
0.0384 |
915 |
0.1150 |
0.1150 |
0.1152 |
0.1152 |
0.1258 |
0.1259 |
0.1260 |
0.1261 |
0.1648 |
0.330 |
0.396 |
0.225 |
0.1124 |
0.0937 |
450,000 |
1.317 |
0.111c |
7,268 |
19,430 |
0.0518 |
939 |
0.1279 |
0.1280 |
0.1280 |
0.1280 |
0.1400 |
0.1401 |
0.1401 |
0.1401 |
0.1496 |
0.299 |
0.359 |
0.207 |
0.1033 |
0.0861 |
450,000 |
1.188 |
0.105d |
7,266 |
19,430 |
0.0462 |
910 |
0.1278 |
0.1279 |
0.1279 |
0.1280 |
0.1399 |
0.1400 |
0.1400 |
0.1401 |
0.1554 |
0.311 |
0.373 |
0.214 |
0.1070 |
0.0892 |
400,000 |
1.218 |
0.106c |
6,460 |
17,270 |
0.0478 |
864 |
0.1439 |
0.1440 |
0.1440 |
0.1440 |
0.1575 |
0.1576 |
0.1576 |
0.1576 |
0.1537 |
0.307 |
0.369 |
0.212 |
0.1061 |
0.0884 |
400,000 |
1.103 |
0.100d |
6,458 |
17,270 |
0.0428 |
838 |
0.1438 |
0.1439 |
0.1439 |
0.1440 |
0.1574 |
0.1575 |
0.1575 |
0.1576 |
0.1593 |
0.319 |
0.382 |
0.219 |
0.1097 |
0.0914 |
350,000 |
1.128 |
0.102c |
5,653 |
15,110 |
0.0443 |
790 |
0.1644 |
0.1645 |
0.1645 |
0.1645 |
0.1799 |
0.1800 |
0.1800 |
0.1800 |
0.1576 |
0.315 |
0.378 |
0.218 |
0.1089 |
0.0907 |
350,000 |
1.014 |
0.096d |
5,650 |
15,110 |
0.0393 |
764 |
0.1644 |
0.1645 |
0.1645 |
0.1646 |
0.1799 |
0.1800 |
0.1800 |
0.1801 |
0.1637 |
0.328 |
0.393 |
0.225 |
0.1127 |
0.0939 |
300,000 |
1.020 |
0.096c |
4,845 |
12,950 |
0.0399 |
709 |
0.1918 |
0.1919 |
0.1919 |
0.1919 |
0.210 |
0.210 |
0.210 |
0.210 |
0.1628 |
0.326 |
0.391 |
0.225 |
0.1124 |
0.0937 |
300,000 |
0.919 |
0.091d |
4,843 |
12,950 |
0.0355 |
687 |
0.1917 |
0.1918 |
0.1918 |
0.1919 |
0.210 |
0.210 |
0.210 |
0.210 |
0.1688 |
0.338 |
0.405 |
0.232 |
0.1162 |
0.0968 |
250,000 |
0.914 |
0.091c |
4,037 |
10,790 |
0.0357 |
626 |
0.230 |
0.230 |
0.230 |
0.230 |
0.252 |
0.252 |
0.252 |
0.252 |
0.1685 |
0.337 |
0.404 |
0.233 |
0.1163 |
0.0970 |
250,000 |
0.818 |
0.086d |
4,036 |
10,790 |
0.0315 |
606 |
0.230 |
0.230 |
0.230 |
0.230 |
0.252 |
0.252 |
0.252 |
0.252 |
0.1748 |
0.350 |
0.420 |
0.241 |
0.1203 |
0.1002 |
250,000 |
0.766 |
0.094d |
4,034 |
10,790 |
0.0292 |
594 |
0.230 |
0.230 |
0.230 |
0.230 |
0.252 |
0.252 |
0.252 |
0.252 |
0.1787 |
0.357 |
0.429 |
0.245 |
0.1226 |
0.1022 |
214,500 |
0.650 |
0.098d |
3,459 |
9,265 |
0.0243 |
524 |
0.268 |
0.268 |
0.268 |
0.268 |
0.293 |
0.293 |
0.293 |
0.294 |
0.1879 |
0.376 |
0.451 |
0.257 |
0.1285 |
0.1071 |
4/0 |
0.733 |
0.082d |
3,415 |
9,140 |
0.0281 |
539 |
0.272 |
0.272 |
0.272 |
0.272 |
0.297 |
0.297 |
0.298 |
0.298 |
0.1806 |
0.361 |
0.433 |
0.248 |
0.1242 |
0.1035 |
3/0 |
0.608 |
0.080d |
2,707 |
7,240 |
0.0230 |
454 |
0.343 |
0.343 |
0.343 |
0.343 |
0.375 |
0.375 |
0.375 |
0.375 |
0.1907 |
0.381 |
0.458 |
0.262 |
0.1309 |
0.1091 |
2/0 |
0.500 |
0.080d |
2,146 |
5,750 |
0.0180 |
382 |
0.432 |
0.432 |
0.432 |
0.432 |
0.472 |
0.473 |
0.473 |
0.473 |
0.201 |
0.403 |
0.483 |
0.276 |
0.1378 |
0.1149 |
Source: Westinghouse Electric Corporation, Electric Utility Engineering Reference Book—Distribution Systems, East Pittsburgh, PA, 1965.
a Conductors of smaller diameter for given cross-sectional are also available; in the naught sizes, some additional diameter expansion is possible.
b For conductor at 75°C, air at 25°C, wind 1.4 mi/h (2 ft/s), frequency = 60 cycles.
c Thickness at edges of interlocked segments.
d Thickness uniform throughout.
Characteristics of Alcoa Aluminum Conductors, Hard-Drawn, 61% Conductivity
Size of Conductor Circular Mils or AWG |
No. of Strands |
Diameter of Individual Strands (in.) |
Outside Diameter (in.) |
Ultimate Strength (lb) |
Weight (lb/mi) |
Geometric Mean Radius at 60 Cycles (ft) |
Approx. Current Carrying Capacitya (amps) |
ra Resistance (Ω/Conductor/mi) |
Xa Inductive Reactance (Ω/Conductor/mi) at 1 ft Spacing |
Xa Shunt Capacitive Reactance (MΩ · mi/Conductor) at 1 ft Spacing |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
25°C (77°F) |
50°C (122°F) |
||||||||||||||||||||
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
||||||||
6 |
7 |
0.0612 |
0.184 |
528 |
130 |
0.00556 |
100 |
3.56 |
3.56 |
3.56 |
3.56 |
3.91 |
3.91 |
3.91 |
3.91 |
0.2626 |
0.5251 |
0.6301 |
0.3468 |
0.1734 |
0.1445 |
4 |
7 |
0.0772 |
0.232 |
826 |
207 |
0.00700 |
134 |
2.24 |
2.24 |
2.24 |
2.24 |
2.46 |
2.46 |
2.46 |
2.46 |
0.2509 |
0.5017 |
0.6201 |
0.3302 |
0.1651 |
0.1376 |
3 |
7 |
0.0867 |
0.260 |
1,022 |
261 |
0.00787 |
155 |
1.77 |
1.77 |
1.77 |
1.77 |
1.95 |
1.95 |
1.95 |
1.95 |
0.2450 |
0.4899 |
0.5879 |
0.3221 |
0.1610 |
0.1342 |
2 |
7 |
0.0974 |
0.292 |
1,266 |
329 |
0.00883 |
180 |
1.41 |
1.41 |
1.41 |
1.41 |
1.55 |
1.55 |
1.55 |
1.55 |
0.2391 |
0.4782 |
0.5739 |
0.3139 |
0.1570 |
0.1308 |
1 |
7 |
0.1094 |
0.328 |
1,537 |
414 |
0.00992 |
209 |
1.12 |
1.12 |
1.12 |
1.12 |
1.23 |
1.23 |
1.23 |
1.23 |
0.2333 |
0.4665 |
0.5598 |
0.3055 |
0.1528 |
0.1273 |
1/0 |
7 |
0.1228 |
0.368 |
1,865 |
523 |
0.01113 |
242 |
0.885 |
0.8851 |
0.8853 |
0.885 |
0.973 |
0.9731 |
0.9732 |
0.973 |
0.2264 |
0.4528 |
0.5434 |
0.2976 |
0.1488 |
0.1240 |
1/0 |
19 |
0.0745 |
0.373 |
2,090 |
523 |
0.01177 |
244 |
0.885 |
0.8851 |
0.8853 |
0.885 |
0.973 |
0.9731 |
0.9732 |
0.973 |
0.2246 |
0.4492 |
0.5391 |
0.2964 |
0.1482 |
0.1235 |
2/0 |
7 |
0.1379 |
0.414 |
2,350 |
659 |
0.01251 |
282 |
0.702 |
0.7021 |
0.7024 |
0.702 |
0.771 |
0.7711 |
0.7713 |
0.771 |
0.2216 |
0.4431 |
0.5317 |
0.2890 |
0.1445 |
0.1204 |
2/0 |
19 |
0.0837 |
0.419 |
2,586 |
659 |
0.01321 |
283 |
0.702 |
0.7021 |
0.7024 |
0.702 |
0.771 |
0.7711 |
0.7713 |
0.771 |
0.2188 |
0.4376 |
0.5251 |
0.2882 |
0.1441 |
0.1201 |
3/0 |
7 |
0.1548 |
0.464 |
2,845 |
832 |
0.01404 |
327 |
0.557 |
0.5571 |
0.5574 |
0.558 |
0.612 |
0.6121 |
0.6124 |
0.613 |
0.2157 |
0.4314 |
0.5177 |
0.2810 |
0.1405 |
0.1171 |
3/0 |
19 |
0.0940 |
0.470 |
3,200 |
832 |
0.01483 |
328 |
0.557 |
0.5571 |
0.5574 |
0.558 |
0.612 |
0.6121 |
0.6124 |
0.613 |
0.2129 |
0.4258 |
0.5110 |
0.2801 |
0.1400 |
0.1167 |
4/0 |
7 |
0.1739 |
0.522 |
3,590 |
1049 |
0.01577 |
380 |
0.441 |
0.4411 |
0.4415 |
0.442 |
0.485 |
0.4851 |
0.4855 |
0.486 |
0.2099 |
0.4196 |
0.5036 |
0.2726 |
0.1363 |
0.1136 |
4/0 |
19 |
0.1055 |
0.528 |
3,890 |
1049 |
0.01666 |
381 |
0.441 |
0.4411 |
0.4415 |
0.442 |
0.485 |
0.4851 |
0.4855 |
0.486 |
0.2071 |
0.4141 |
0.4969 |
0.2717 |
0.1358 |
0.1132 |
250,000 |
37 |
0.0822 |
0.575 |
4,860 |
1239 |
0.01841 |
425 |
0.374 |
0.3741 |
0.3746 |
0.375 |
0.411 |
0.4111 |
0.4115 |
0.412 |
0.2020 |
0.4040 |
0.4848 |
0.2657 |
0.1328 |
0.1107 |
266,800 |
7 |
0.1953 |
0.586 |
4,525 |
1322 |
0.01771 |
441 |
0.350 |
0.3502 |
0.3506 |
0.351 |
0.385 |
0.3852 |
0.3855 |
0.386 |
0.2040 |
0.4079 |
0.4895 |
0.2642 |
0.1321 |
0.1101 |
266,800 |
37 |
0.0849 |
0.594 |
5,180 |
1322 |
0.01902 |
443 |
0.350 |
0.3502 |
0.3506 |
0.351 |
0.385 |
0.3852 |
0.3855 |
0.386 |
0.2004 |
0.4007 |
0.4809 |
0.2633 |
0.1316 |
0.1097 |
300,000 |
19 |
0.1257 |
0.629 |
5,300 |
1487 |
0.01983 |
478 |
0.311 |
0.3112 |
0.3117 |
0.312 |
0.342 |
0.3422 |
0.3426 |
0.343 |
0.1983 |
0.3965 |
0.4758 |
0.2592 |
0.1296 |
0.1080 |
300,000 |
37 |
0.0900 |
0.630 |
5,830 |
1487 |
0.02017 |
478 |
0.311 |
0.3112 |
0.3117 |
0.312 |
0.342 |
0.3422 |
0.3426 |
0.343 |
0.1974 |
0.3947 |
0.4737 |
0.2592 |
0.1296 |
0.1080 |
336,400 |
19 |
0.1331 |
0.666 |
5,940 |
1667 |
0.02100 |
514 |
0.278 |
0.2782 |
0.2788 |
0.279 |
0.306 |
0.3062 |
0.3067 |
0.307 |
0.1953 |
0.3907 |
0.4688 |
0.2551 |
0.1276 |
0.1063 |
336,400 |
37 |
0.0954 |
0.668 |
6,400 |
1667 |
0.02135 |
514 |
0.278 |
0.2782 |
0.2788 |
0.279 |
0.306 |
0.3062 |
0.3067 |
0.307 |
0.1945 |
0.3890 |
0.4668 |
0.2549 |
0.1274 |
0.1062 |
350,000 |
37 |
0.0973 |
0.681 |
6,680 |
1735 |
0.02178 |
528 |
0.267 |
0.2672 |
0.2678 |
0.268 |
0.294 |
0.2942 |
0.2947 |
0.295 |
0.1935 |
0.3870 |
0.4644 |
0.2537 |
0.1268 |
0.1057 |
397,500 |
19 |
0.1447 |
0.724 |
6,880 |
1967 |
0.02283 |
575 |
0.235 |
0.2352 |
0.2359 |
0.236 |
0.258 |
0.2582 |
0.2589 |
0.259 |
0.1911 |
0.3822 |
0.4587 |
0.2491 |
0.1246 |
0.1038 |
477,000 |
19 |
0.1585 |
0.793 |
8,090 |
2364 |
0.02501 |
646 |
0.196 |
0.1963 |
0.1971 |
0.198 |
0.215 |
0.2153 |
0.2160 |
0.216 |
0.1865 |
0.3730 |
0.4476 |
0.2429 |
0.1214 |
0.1012 |
500,000 |
19 |
0.1623 |
0.812 |
8,475 |
2478 |
0.02560 |
664 |
0.187 |
0.1873 |
0.1882 |
0.189 |
0.206 |
0.2062 |
0.2070 |
0.208 |
0.1853 |
0.3707 |
0.4448 |
0.2412 |
0.1206 |
0.1005 |
500,000 |
37 |
0.1162 |
0.813 |
9,010 |
2478 |
0.02603 |
664 |
0.187 |
0.1873 |
0.1882 |
0.189 |
0.206 |
0.2062 |
0.2070 |
0.208 |
0.1845 |
0.3689 |
0.4427 |
0.2410 |
0.1205 |
0.1004 |
556,500 |
19 |
0.1711 |
0.856 |
9,440 |
2758 |
0.02701 |
710 |
0.168 |
0.1683 |
0.1693 |
0.170 |
0.185 |
0.1853 |
0.1862 |
0.187 |
0.1826 |
0.3652 |
0.4383 |
0.2374 |
0.1187 |
0.0989 |
636,000 |
37 |
0.1311 |
0.918 |
11,240 |
3152 |
0.02936 |
776 |
0.147 |
0.1474 |
0.1484 |
0.149 |
0.162 |
0.1623 |
0.1633 |
0.164 |
0.1785 |
0.3569 |
0.4283 |
0.2323 |
0.1162 |
0.0968 |
715,500 |
37 |
0.1391 |
0.974 |
12,640 |
3546 |
0.03114 |
817 |
0.137 |
0.1314 |
0.1326 |
0.133 |
0.144 |
0.1444 |
0.1455 |
0.146 |
0.1754 |
0.3508 |
0.4210 |
0.2282 |
0.1141 |
0.0951 |
750,000 |
37 |
0.1424 |
0.997 |
12,980 |
3717 |
0.03188 |
864 |
0.125 |
0.1254 |
0.1267 |
0.127 |
0.137 |
0.1374 |
0.1385 |
0.139 |
0.1743 |
0.3485 |
0.4182 |
0.2266 |
0.1133 |
0.0944 |
750,000 |
61 |
0.1109 |
0.998 |
13,510 |
3717 |
0.03211 |
864 |
0.125 |
0.1254 |
0.1267 |
0.127 |
0.137 |
0.1374 |
0.1385 |
0.139 |
0.1739 |
0.3477 |
0.4173 |
0.2263 |
0.1132 |
0.0943 |
795,000 |
37 |
0.1466 |
1.026 |
13,770 |
3940 |
0.03283 |
897 |
0.117 |
0.1175 |
0.1188 |
0.120 |
0.129 |
0.1294 |
0.1306 |
0.131 |
0.1728 |
0.3455 |
0.4146 |
0.2244 |
0.1122 |
0.0935 |
874,500 |
37 |
0.1538 |
1.077 |
14,830 |
4334 |
0.03443 |
949 |
0.107 |
0.1075 |
0.1089 |
0.110 |
0.118 |
0.1185 |
0.1198 |
0.121 |
0.1703 |
0.3407 |
0.4088 |
0.2210 |
0.1105 |
0.0921 |
954,000 |
37 |
0.1606 |
1.024 |
16,180 |
4728 |
0.03596 |
1000 |
0.0979 |
0.0985 |
0.1002 |
0.100 |
0.108 |
0.1085 |
0.1100 |
0.111 |
0.1682 |
0.3363 |
0.4036 |
0.2179 |
0.1090 |
0.0908 |
1,000,000 |
61 |
0.1280 |
1.152 |
17,670 |
4956 |
0.03707 |
1030 |
0.0934 |
0.0940 |
0.0956 |
0.0966 |
0.103 |
0.1035 |
0.1050 |
0.106 |
0.1666 |
0.3332 |
0.3998 |
0.2162 |
0.1081 |
0.0901 |
1,000,000 |
91 |
0.1048 |
1.153 |
18,380 |
4956 |
0.03720 |
1030 |
0.0934 |
0.0940 |
0.0956 |
0.0966 |
0.103 |
0.1035 |
0.1050 |
0.106 |
0.1664 |
0.3328 |
0.3994 |
0.2160 |
0.1080 |
0.0900 |
1,033,500 |
37 |
0.1672 |
1.170 |
18,260 |
5122 |
0.03743 |
1050 |
0.0904 |
0.0910 |
0.0927 |
0.0936 |
0.0994 |
0.0999 |
0.1015 |
0.102 |
0.1661 |
0.3322 |
0.3987 |
0.2150 |
0.1075 |
0.0895 |
1,113,000 |
61 |
0.1351 |
1.216 |
19,660 |
5517 |
0.03910 |
1110 |
0.0839 |
0.0845 |
0.0864 |
0.0874 |
0.0922 |
0.0928 |
0.0945 |
0.0954 |
0.1639 |
0.3278 |
0.3934 |
0.2124 |
0.1062 |
0.0885 |
1,192,500 |
61 |
0.1398 |
1.258 |
21,000 |
5908 |
0.04048 |
1160 |
0.0783 |
0.0790 |
0.0810 |
0.0821 |
0.0860 |
0.0866 |
0.0884 |
0.0895 |
0.1622 |
0.3243 |
0.3892 |
0.2100 |
0.1050 |
0.0875 |
1,192,500 |
91 |
0.1145 |
1.259 |
21,400 |
5908 |
0.04062 |
1160 |
0.0783 |
0.0790 |
0.0810 |
0.0821 |
0.0860 |
0.0866 |
0.0884 |
0.0895 |
0.1620 |
0.3240 |
0.3888 |
0.2098 |
0.1049 |
0.0874 |
1,272,000 |
61 |
0.1444 |
1.300 |
22,000 |
6299 |
0.04180 |
1210 |
0.0734 |
0.0741 |
0.0762 |
0.0774 |
0.0806 |
0.0813 |
0.0832 |
0.0843 |
0.1606 |
0.3211 |
0.3853 |
0.2076 |
0.1038 |
0.0865 |
1,351,500 |
61 |
0.1489 |
1.340 |
23,400 |
6700 |
0.04309 |
1250 |
0.0691 |
0.0699 |
0.0721 |
0.0733 |
0.0760 |
0.0767 |
0.0787 |
0.0798 |
0.1590 |
0.3180 |
0.3816 |
0.2054 |
0.1027 |
0.0856 |
1,431,000 |
61 |
0.1532 |
1.379 |
24,300 |
7091 |
0.04434 |
1300 |
0.0653 |
0.0661 |
0.0685 |
0.0697 |
0.0718 |
0.0725 |
0.0747 |
0.0759 |
0.1576 |
0.3152 |
0.3782 |
0.2033 |
0.1016 |
0.0847 |
1,510,500 |
61 |
0.1574 |
1.417 |
25,600 |
7487 |
0.04556 |
1320 |
0.0618 |
0.0627 |
0.0651 |
0.0665 |
0.0679 |
0.0687 |
0.0710 |
0.0722 |
0.1562 |
0.3123 |
0.3748 |
0.2014 |
0.1007 |
0.0839 |
1,590,000 |
61 |
0.1615 |
1.454 |
27,000 |
7883 |
0.04674 |
1380 |
0.0597 |
0.0596 |
0.0622 |
0.0636 |
0.0645 |
0.0653 |
0.0677 |
0.0690 |
0.1549 |
0.3098 |
0.3718 |
0.1997 |
0.0998 |
0.0832 |
1,590,000 |
91 |
0.1322 |
1.454 |
28,100 |
7883 |
0.04691 |
1380 |
0.0587 |
0.0596 |
0.0622 |
0.0636 |
0.0645 |
0.0653 |
0.0677 |
0.0690 |
0.1547 |
0.3094 |
0.3713 |
0.1997 |
0.0998 |
0.0832 |
Source: Westinghouse Electric Corporation, Electric Utility Engineering Reference Book—Distribution Systems, East Pittsburgh, PA, 1965.
a For conductor at 75°C, wind 1.4 mi/h (2 ft/s), frequency = 60 cycles.
Characteristics of Aluminum Cable, Steel Reinforced (Aluminum Company of America)
Aluminum |
Steel |
ra Resistance(Ω/Conductor/mi) |
X'a |
X'a |
|||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Circular Mils or AWG Aluminum |
Strands |
Layers |
Strand Diameter (in.) |
Strands |
Strand Diameter (in.) |
Outside Diameter (in.) |
Copper Equivalenta Circular Miles or AWG |
Ultimate Strength (lb) |
Weight (lb/mi) |
Geometric Mean Radius at 60 cycles (ft) |
Approx. Current Carrying Capacityb (amps) |
25°C (77°F) |
Small Currents |
50°C (122°F) Current Approx. 75% Capacityc |
xa Inductive Reactance (H/Conductor/mi) at 1 ft Spacing All Currents |
X'a Shunt Capacitive Reactance (MH · mi/Conductor) at 1 ft Spacing |
|||||||||||||||
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
||||||||||||||||||
1,590,000 |
54 |
3 |
0.1716 |
19 |
0.1030 |
1.545 |
1,000,000 |
56,000 |
10,777 |
0.0520 |
1380 |
0.0587 |
0.0588 |
0.0590 |
0.0591 |
0.0646 |
0.0656 |
0.0675 |
0.0684 |
0.1495 |
0.299 |
0.359 |
0.1953 |
0.0977 |
0.0814 |
||||||
1,510,500 |
54 |
3 |
0.1673 |
19 |
0.1004 |
1.506 |
950,000 |
53,200 |
10,237 |
0.0507 |
1340 |
0.0618 |
0.0619 |
0.0621 |
0.0622 |
0.0680 |
0.0690 |
0.0710 |
0.0720 |
0.1508 |
0.302 |
0.362 |
0.1971 |
0.0986 |
0.0821 |
||||||
1,431,000 |
54 |
3 |
0.1628 |
19 |
0.0977 |
1.465 |
900,000 |
50,400 |
9,699 |
0.0493 |
1300 |
0.0652 |
0.0653 |
0.0655 |
0.0656 |
0.0718 |
0.0729 |
0.0749 |
0.0760 |
0.1522 |
0.304 |
0.365 |
0.1991 |
0.0996 |
0.0830 |
||||||
1,351,000 |
54 |
3 |
0.1582 |
19 |
0.0949 |
1.424 |
850,000 |
47,600 |
9,160 |
0.0479 |
1250 |
0.0691 |
0.0692 |
0.0694 |
0.0695 |
0.0761 |
0.0771 |
0.0792 |
0.0803 |
0.1536 |
0.307 |
0.369 |
0.201 |
0.1006 |
0.0838 |
||||||
1,272,000 |
54 |
3 |
0.1535 |
19 |
0.0921 |
1.382 |
800,000 |
44,800 |
8,621 |
0.0465 |
1200 |
0.0734 |
0.0735 |
0.0737 |
0.0738 |
0.0808 |
0.0819 |
0.0840 |
0.0851 |
0.1551 |
0.310 |
0.372 |
0.203 |
0.1016 |
0.0847 |
||||||
1,192,500 |
54 |
3 |
0.1486 |
19 |
0.0892 |
1.338 |
750,000 |
43,100 |
8,082 |
0.0450 |
1160 |
0.0783 |
0.0784 |
0.0786 |
0.0788 |
0.0862 |
0.0872 |
0.0894 |
0.0906 |
0.1568 |
0.314 |
0.376 |
0.206 |
0.1028 |
0.0857 |
||||||
1,113,000 |
54 |
3 |
0.1436 |
19 |
0.0862 |
1.293 |
700,000 |
40,200 |
7,544 |
0.0435 |
1110 |
0.0839 |
0.0840 |
0.0842 |
0.0844 |
0.0924 |
0.0935 |
0.0957 |
0.0969 |
0.1585 |
0.317 |
0.380 |
0.208 |
0.1040 |
0.0867 |
||||||
1,033,500 |
54 |
3 |
0.1384 |
7 |
0.1384 |
1.246 |
650,000 |
37,100 |
7,019 |
0.0420 |
1060 |
0.0903 |
0.0905 |
0.0907 |
0.0908 |
0.0994 |
0.1005 |
0.1025 |
0.1035 |
0.1603 |
0.321 |
0.385 |
0.211 |
0.1053 |
0.0878 |
||||||
954,000 |
54 |
3 |
0.1329 |
7 |
0.1329 |
1.196 |
600,000 |
34,200 |
6,479 |
0.0403 |
1010 |
0.0979 |
0.0980 |
0.0981 |
0.0982 |
0.1078 |
0.1088 |
0.1118 |
0.1128 |
0.1624 |
0.325 |
0.390 |
0.214 |
0.1068 |
0.0890 |
||||||
900,000 |
54 |
3 |
0.1291 |
7 |
0.1291 |
1.162 |
566,000 |
32,300 |
6,112 |
0.0391 |
970 |
0.104 |
0.104 |
0.104 |
0.104 |
0.1145 |
0.1155 |
0.1175 |
0.1185 |
0.1639 |
0.328 |
0.393 |
0.216 |
0.1078 |
0.0898 |
||||||
874,500 |
54 |
3 |
0.1273 |
7 |
0.1273 |
1.146 |
550,000 |
31,400 |
5,940 |
0.0386 |
950 |
0.107 |
0.107 |
0.107 |
0.108 |
0.1178 |
0.1188 |
0.1218 |
0.1228 |
0.1646 |
0.329 |
0.395 |
0.217 |
0.1083 |
0.0903 |
||||||
795,000 |
54 |
3 |
0.1214 |
7 |
0.1214 |
1.093 |
500,000 |
28,500 |
5,399 |
0.0368 |
900 |
0.117 |
0.118 |
0.118 |
0.119 |
0.1288 |
0.1308 |
0.1358 |
0.1378 |
0.1670 |
0.334 |
0.401 |
0.220 |
0.1100 |
0.0917 |
||||||
795,000 |
26 |
2 |
0.1749 |
7 |
0.1360 |
1.108 |
500,000 |
31,200 |
5,770 |
0.0375 |
900 |
0.117 |
0.117 |
0.117 |
0.117 |
0.1288 |
0.1288 |
0.1288 |
0.1288 |
0.1660 |
0.332 |
0.399 |
0.219 |
0.1095 |
0.0912 |
||||||
795,000 |
30 |
2 |
0.1628 |
19 |
0.0977 |
1.140 |
500,000 |
38,400 |
6,517 |
0.0393 |
910 |
0.117 |
0.117 |
0.117 |
0.117 |
0.1288 |
0.1288 |
0.1288 |
0.1288 |
0.1637 |
0.327 |
0.393 |
0.217 |
0.1085 |
0.0904 |
||||||
715,500 |
54 |
3 |
0.1151 |
7 |
0.1151 |
1.036 |
450,000 |
26,300 |
4,859 |
0.0349 |
830 |
0.131 |
0.131 |
0.131 |
0.132 |
0.1442 |
0.1452 |
0.1472 |
0.1482 |
0.1697 |
0.339 |
0.407 |
0.224 |
0.1119 |
0.0932 |
||||||
715,500 |
26 |
2 |
0.1659 |
7 |
0.1290 |
1.051 |
450,000 |
28,100 |
5,193 |
0.0355 |
840 |
0.131 |
0.131 |
0.131 |
0.131 |
0.1442 |
0.1442 |
0.1442 |
0.1442 |
0.1687 |
0.337 |
0.405 |
0.223 |
0.1114 |
0.0928 |
||||||
715,500 |
30 |
2 |
0.1544 |
19 |
0.0926 |
1.081 |
450,000 |
34,600 |
5,865 |
0.0372 |
840 |
0.131 |
0.131 |
0.131 |
0.131 |
0.1442 |
0.1442 |
0.1442 |
0.1442 |
0.1664 |
0.333 |
0.399 |
0.221 |
0.1104 |
0.0920 |
||||||
666,600 |
54 |
3 |
0.1111 |
7 |
0.1111 |
1.000 |
419,000 |
24,500 |
4,527 |
0.0337 |
800 |
0.140 |
0.140 |
0.141 |
0.141 |
0.1541 |
0.1571 |
0.1591 |
0.1601 |
0.1715 |
0.343 |
0.412 |
0.226 |
0.1132 |
0.0943 |
||||||
636,000 |
54 |
3 |
0.1085 |
7 |
0.1085 |
0.977 |
400,000 |
23,600 |
4,319 |
0.0329 |
770 |
0.147 |
0.147 |
0.148 |
0.148 |
0.1618 |
0.1638 |
0.1678 |
0.1688 |
0.1726 |
0.345 |
0.414 |
0.228 |
0.1140 |
0.0950 |
||||||
636,000 |
26 |
2 |
0.1564 |
7 |
0.1216 |
0.990 |
400,000 |
25,000 |
4,616 |
0.0335 |
780 |
0.147 |
0.147 |
0.147 |
0.147 |
0.1618 |
0.1618 |
0.1618 |
0.1618 |
0.1718 |
0.344 |
0.412 |
0.227 |
0.1135 |
0.0946 |
||||||
636,000 |
30 |
2 |
0.1456 |
19 |
0.0874 |
1.019 |
400,000 |
31,500 |
5,213 |
0.0351 |
780 |
0.147 |
0.147 |
0.147 |
0.147 |
0.1618 |
0.1618 |
0.1618 |
0.1618 |
0.1693 |
0.339 |
0.406 |
0.225 |
0.1125 |
0.0937 |
||||||
605,000 |
54 |
3 |
0.1059 |
7 |
0.1059 |
0.953 |
380,500 |
22,500 |
4,109 |
0.0321 |
750 |
0.154 |
0.155 |
0.155 |
0.155 |
0.1695 |
0.1715 |
0.1755 |
0.1775 |
0.1739 |
0.348 |
0.417 |
0.230 |
0.1149 |
0.0957 |
||||||
605,000 |
26 |
2 |
0.1525 |
7 |
0.1186 |
0.966 |
380,500 |
24,100 |
4,391 |
0.0327 |
760 |
0.154 |
0.154 |
0.154 |
0.154 |
0.1700 |
0.1720 |
0.1720 |
0.1720 |
0.1730 |
0.346 |
0.415 |
0.229 |
0.1144 |
0.0953 |
||||||
556,500 |
26 |
2 |
0.1463 |
7 |
0.1138 |
0.927 |
350,000 |
22,400 |
4,039 |
0.0313 |
730 |
0.168 |
0.168 |
0.168 |
0.168 |
0.1849 |
0.1859 |
0.1859 |
0.1859 |
0.1751 |
0.350 |
0.420 |
0.232 |
0.1159 |
0.0965 |
||||||
556,500 |
30 |
2 |
0.1362 |
7 |
0.1362 |
0.953 |
350,000 |
27,200 |
4,588 |
0.0328 |
730 |
0.168 |
0.168 |
0.168 |
0.168 |
0.1849 |
0.1859 |
0.1859 |
0.1859 |
0.1728 |
0.346 |
0.415 |
0.230 |
0.1149 |
0.0957 |
||||||
500,000 |
30 |
2 |
0.1291 |
7 |
0.1291 |
0.904 |
314,500 |
24,400 |
4,122 |
0.0311 |
690 |
0.187 |
0.187 |
0.187 |
0.187 |
0.206 |
0.1754 |
0.351 |
0.421 |
0.234 |
0.1167 |
0.0973 |
|||||||||
477,000 |
26 |
2 |
0.1355 |
7 |
0.1054 |
0.858 |
300,000 |
19,430 |
3,462 |
0.0290 |
670 |
0.196 |
0.196 |
0.196 |
0.196 |
0.216 |
0.1790 |
0.358 |
0.430 |
0.237 |
0.1186 |
0.0988 |
|||||||||
477,000 |
30 |
2 |
0.1261 |
7 |
0.1261 |
0.883 |
300,000 |
23,300 |
3,933 |
0.0304 |
670 |
0.196 |
0.196 |
0.196 |
0.196 |
0.216 |
0.1766 |
0.353 |
0.424 |
0.235 |
0.1176 |
0.0980 |
|||||||||
397,500 |
26 |
2 |
0.1236 |
7 |
0.0961 |
0.783 |
250,000 |
16,190 |
2,885 |
0.0265 |
590 |
0.235 |
0.259 |
0.1836 |
0.367 |
0.441 |
0.244 |
0.1219 |
0.1015 |
||||||||||||
397,500 |
30 |
2 |
0.1151 |
7 |
0.1151 |
0.806 |
250,000 |
19,980 |
3,277 |
0.0278 |
600 |
0.235 |
Same as DC |
0.259 |
Same as DC |
0.1812 |
0.362 |
0.435 |
0.242 |
0.1208 |
0.1006 |
||||||||||
336,400 |
26 |
2 |
0.1138 |
7 |
0.0885 |
0.721 |
4/0 |
14,050 |
2,442 |
0.0244 |
530 |
0.278 |
0.306 |
0.1872 |
0.376 |
0.451 |
0.250 |
0.1248 |
0.1039 |
||||||||||||
336,400 |
30 |
2 |
0.1059 |
7 |
0.1059 |
0.741 |
4/0 |
17,040 |
2,774 |
0.0255 |
530 |
0.278 |
0.306 |
0.1855 |
0.371 |
0.445 |
0.248 |
0.1238 |
0.1032 |
||||||||||||
300,000 |
26 |
2 |
0.1074 |
7 |
0.0835 |
0.680 |
188,700 |
12,650 |
2,178 |
0.0230 |
490 |
0.311 |
0.342 |
0.1908 |
0.382 |
0.458 |
0.254 |
0.1269 |
0.1057 |
||||||||||||
300,000 |
30 |
2 |
0.1000 |
7 |
0.1000 |
0.700 |
188,700 |
15,430 |
2,473 |
0.0241 |
500 |
0.311 |
0.342 |
0.1883 |
0.377 |
0.452 |
0.252 |
0.1258 |
0.1049 |
||||||||||||
266,800 |
26 |
2 |
0.1013 |
7 |
0.0788 |
0.642 |
3/0 |
11,250 |
1,936 |
0.0217 |
460 |
0.350 |
0.385 |
0.1936 |
0.387 |
0.465 |
0.258 |
0.1289 |
0.1074 |
||||||||||||
For Current Approx. 75% Capacityc |
Single Layer Conductors |
||||||||||||||||||||||||||||||
Small Currents |
Current A pprox. 75% Capacityc |
||||||||||||||||||||||||||||||
25 |
50 |
60 |
25 |
50 |
60 |
||||||||||||||||||||||||||
266,800 |
6 |
1 |
0.2109 |
7 |
0.0703 |
0.633 |
3/0 |
9,645 |
1,802 |
0.00684 |
460 |
0.351 |
0.351 |
0.351 |
0.352 |
0.386 |
0.430 |
0.510 |
0.552 |
0.194 |
0.388 |
0.466 |
0.252 |
0.504 |
0.605 |
0.259 |
0.1294 |
0.1079 |
|||
4/0 |
6 |
1 |
0.1878 |
1 |
0.1878 |
0.563 |
2/0 |
8,420 |
1,542 |
0.00814 |
340 |
0.441 |
0.442 |
0.444 |
0.445 |
0.485 |
0.514 |
0.567 |
0.592 |
0.218 |
0.437 |
0.524 |
0.242 |
0.484 |
0.581 |
0.267 |
0.1336 |
0.1113 |
|||
3/0 |
6 |
1 |
0.1672 |
1 |
0.1672 |
0.502 |
1/0 |
6,675 |
1,223 |
0.00600 |
300 |
0.556 |
0.557 |
0.559 |
0.560 |
0.612 |
0.642 |
0.697 |
0.723 |
0.225 |
0.450 |
0.540 |
0.259 |
0.517 |
0.621 |
0.275 |
0.1377 |
0.1147 |
|||
2/0 |
6 |
1 |
0.1490 |
1 |
0.1490 |
0.447 |
1 |
5,345 |
970 |
0.00510 |
270 |
0.702 |
0.702 |
0.704 |
0.706 |
0.773 |
0.806 |
0.866 |
0.895 |
0.231 |
0.462 |
0.554 |
0.267 |
0.534 |
0.641 |
0.284 |
0.1418 |
0.1182 |
|||
1/0 |
6 |
1 |
0.1327 |
1 |
0.1327 |
0.398 |
2 |
4,280 |
769 |
0.00446 |
230 |
0.885 |
0.885 |
0.887 |
0.888 |
0.974 |
1.01 |
1.08 |
1.12 |
0.237 |
0.473 |
0.568 |
0.273 |
0.547 |
0.656 |
0.292 |
0.1460 |
0.1216 |
|||
1 |
6 |
1 |
0.1182 |
1 |
0.1182 |
0.355 |
3 |
3,480 |
610 |
0.00418 |
200 |
1.12 |
1.12 |
1.12 |
1.12 |
1.23 |
1.27 |
1.34 |
1.38 |
0.242 |
0.483 |
0.580 |
0.277 |
0.554 |
0.665 |
0.300 |
0.1500 |
0.1250 |
|||
2 |
6 |
1 |
0.1052 |
1 |
0.1052 |
0.316 |
4 |
2,790 |
484 |
0.00418 |
180 |
1.41 |
1.41 |
1.41 |
1.41 |
1.55 |
1.59 |
1.66 |
1.69 |
0.247 |
0.493 |
0.592 |
0.277 |
0.554 |
0.665 |
0.308 |
0.1542 |
0.1285 |
|||
2 |
7 |
1 |
0.0974 |
1 |
0.1299 |
0.325 |
4 |
3,525 |
566 |
0.00504 |
180 |
1.41 |
1.41 |
1.41 |
1.41 |
1.55 |
1.59 |
1.62 |
1.65 |
0.247 |
0.493 |
0.592 |
0.267 |
0.535 |
0.642 |
0.306 |
0.1532 |
0.1276 |
|||
3 |
6 |
1 |
0.0937 |
1 |
0.0937 |
0.281 |
5 |
2,250 |
384 |
0.00430 |
160 |
1.78 |
1.78 |
1.78 |
1.78 |
1.95 |
1.95 |
2.04 |
2.07 |
0.252 |
0.503 |
0.604 |
0.275 |
0.551 |
0.661 |
0.317 |
0.1583 |
0.1320 |
|||
4 |
6 |
1 |
0.0834 |
1 |
0.0834 |
0.250 |
6 |
1,830 |
304 |
0.00437 |
140 |
2.24 |
2.24 |
2.24 |
2.24 |
2.47 |
2.50 |
2.54 |
2.57 |
0.257 |
0.514 |
0.611 |
0.274 |
0.549 |
0.659 |
0.325 |
0.1627 |
0.1355 |
|||
4 |
7 |
1 |
0.0772 |
1 |
0.1029 |
0.257 |
6 |
2,288 |
356 |
0.00452 |
140 |
2.24 |
2.24 |
2.24 |
2.24 |
2.47 |
2.50 |
2.53 |
2.55 |
0.257 |
0.515 |
0.618 |
0.273 |
0.545 |
0.655 |
0.323 |
0.1615 |
0.1346 |
|||
5 |
6 |
1 |
0.0743 |
1 |
0.0743 |
0.223 |
7 |
1,460 |
241 |
0.00416 |
120 |
2.82 |
2.82 |
2.82 |
2.82 |
3.10 |
3.12 |
3.16 |
3.18 |
0.262 |
0.525 |
0.630 |
0.279 |
0.557 |
0.665 |
0.333 |
0.1666 |
0.1388 |
|||
6 |
6 |
1 |
0.0661 |
1 |
0.0661 |
0.198 |
8 |
1,170 |
191 |
0.00394 |
100 |
3.56 |
3.56 |
3.56 |
3.56 |
3.92 |
3.94 |
3.97 |
3.98 |
0.268 |
0.536 |
0.643 |
0.281 |
0.561 |
0.673 |
0.342 |
0.1708 |
0.1423 |
|||
a Based on copper 97%, aluminum 61% conductivity.
b For conductor at 75°C, air at 25°C, wind 1.4 mi/h (2 ft/s), frequency = 60 cycles.
c “Current Approx. 75% Capacity” is 75% of the “Approx. Current Carrying Capacity in Amps.” and is approximately the current which will produce 50°C conductor temperature (25°C rise) with 25°C air temperature, wind 1.4 mi/h.
Characteristics of “Expanded” Aluminum Cable, Steel Reinforced (Aluminum Company of America)
Circular Mils AWG Aluminum |
Aluminum |
Steel |
Filler Section |
Outside Diameter (in.) |
Copper Equivalent Circular Miles or AWG |
Ultimate Strength (lb) |
Weight (lb/mi) |
Geometric Mean Radius at 60 Cycles (ft) |
Approx. Current Carrying Capacity (amps) |
ra Resistance (Ω/Conductor/mi) |
xa |
X'a |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Strands |
Layers |
Strand Diameter (in.) |
Strands |
Strand Diameter (in.) |
Aluminum |
Paper |
25°C (77°F) Small Currents |
50°C (122°F) Current approx. 75% Capacity* |
Inductive Reactance (D/Conductor/mi) at1 ft Spacing All Currents |
Shunt Capacitive Reactance (MD · mi/Conductor) at 1 ft Spacing |
|||||||||||||||||||
Strand |
Strand Diameter (in.) |
Strands |
Layers |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
||||||||||||
850,000 |
54 |
2 |
0.1255 |
19 |
0.0834 |
4 |
0.1182 |
23 |
2 |
1.38 |
534,000 |
35,371 |
7,200 |
||||||||||||||||
1,150,000 |
54 |
2 |
0.1409 |
19 |
0.0921 |
4 |
0.1353 |
24 |
2 |
1.55 |
724,000 |
41,900 |
9,070 |
(a) |
(a) |
(a) |
(a) |
(a) |
(a) |
(a) |
(a) |
(a) |
(a) |
||||||
1,338,000 |
66 |
2 |
0.1350 |
19 |
0.100 |
4 |
0.184 |
18 |
2 |
1.75 |
840,000 |
49,278 |
11,340 |
||||||||||||||||
(a) Electrical characteristics not available until laboratory measurements are completed.
Characteristics of Copperweld Copper Conductors
Size of Conductor |
Copper Equivalent Circular Mile or AWG |
Rated Breaking Load (lb) |
Weight (lb/mi) |
Geometric Mean Radius at 60 Cycles (ft) |
Approx. Current Carrying Capacity at 60 Cycles (amps)a |
ra Resistance (Ω/Conductor/mi) at 25°C (77°F) Small Currents |
ra Resistance (Ω/Conductor/mi) at 50°C (122°F) Current Approx. 75% of Capacityb |
Xa Inductive Reactance (Ω/Conductor/mi) 1 ft Spacing Average Currents |
X'a Capacitive Reactance (MΩ · mi/Conductor) 1 ft Spacing |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nominal Designation |
(Number and Diameter of Wires) |
Outside Diameter (in.) |
||||||||||||||||||||
Copperweld |
Copper |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
DC |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
25 Cycles |
50 Cycles |
60 Cycles |
|||||||
350 E |
7x. 1576” |
12x. 1576” |
0.788 |
350,000 |
32,420 |
7409 |
0.0220 |
660 |
0.1658 |
0.1728 |
0.1789 |
0.1812 |
0.1812 |
0.1915 |
0.201 |
0.204 |
0.1929 |
0.386 |
0.463 |
0.243 |
0.1216 |
0.1014 |
350 EK |
4x. 1470” |
15x. 1470” |
0.735 |
350,000 |
23,850 |
6536 |
0.0245 |
680 |
0.1658 |
0.1682 |
0.1700 |
0.1705 |
0.1812 |
0.1845 |
0.1873 |
0.1882 |
0.1875 |
0.375 |
0.450 |
0.248 |
0.1241 |
0.1034 |
350 V |
3x. 1751” |
9x. 1893” |
0.754 |
350,000 |
23,480 |
6578 |
0.0226 |
650 |
0.1655 |
0.1725 |
0.1800 |
0.1828 |
0.1809 |
0.1910 |
0.202 |
0.206 |
0.1915 |
0.383 |
0.460 |
0.246 |
0.1232 |
0.1027 |
300 E |
7x. 1459” |
12x. 1459” |
0.729 |
300,000 |
27,770 |
6351 |
-0.0204 |
500 |
0.1934 |
0.200 |
0.207 |
0.209 |
0.211 |
0.222 |
0.232 |
0.235 |
0.1969 |
0.394 |
0.473 |
0.249 |
0.1244 |
0.1037 |
300 EK |
4x. 1361” |
15x. 1361” |
0.680 |
300,000 |
20,960 |
5602 |
0.0227 |
610 |
0.1934 |
0.1958 |
0.1976 |
0.198 |
0.211 |
0.215 |
0.218 |
0.219 |
0.1914 |
0.383 |
0.460 |
0.254 |
0.1269 |
0.1057 |
300 V |
3x. 1621” |
9x.1752” |
0.698 |
300,000 |
20,730 |
5639 |
0.0208 |
590 |
0.1930 |
0.200 |
0.208 |
0.210 |
0.211 |
0.222 |
0.233 |
0.237 |
0.1954 |
0.391 |
0.469 |
0.252 |
0.1259 |
0.1050 |
250 E |
7x. 1332” |
12x. 1332” |
0.666 |
250,000 |
23,920 |
5292 |
0.01859 |
540 |
0.232 |
0.239 |
0.245 |
0.248 |
0.254 |
0.265 |
0.275 |
0.279 |
0.202 |
0.403 |
0.484 |
0.255 |
0.1276 |
0.1604 |
250 EK |
4x. 1242” |
15x. 1242” |
0.621 |
250,000 |
17,840 |
4669 |
0.0207 |
540 |
0.232 |
0.235 |
0.236 |
0.237 |
0.254 |
0.258 |
0.261 |
0.261 |
0.1960 |
0.392 |
0.471 |
0.260 |
0.1301 |
0.1084 |
250 V |
3x. 1480” |
9x.1600” |
0.637 |
250,000 |
17,420 |
4699 |
0.01911 |
530 |
0.232 |
0.239 |
0.246 |
0.249 |
0.253 |
0.264 |
0.276 |
0.281 |
0.200 |
0.400 |
0.480 |
0.258 |
0.1292 |
0.1077 |
4/0 E |
7x. 1225” |
12x. 1225” |
0.613 |
4/0 |
20,730 |
4479 |
0.01711 |
480 |
0.274 |
0.281 |
0.287 |
0.290 |
0.300 |
0.312 |
0.323 |
0.326 |
0.206 |
0.411 |
0.493 |
0.261 |
0.1306 |
0.1088 |
4/0 G |
2x. 1944” |
5x. 1944” |
0.583 |
4/0 |
1,540 |
4168 |
0.01409 |
460 |
0.273 |
0.284 |
0.294 |
0.298 |
0.299 |
0.318 |
0.336 |
0.342 |
0.215 |
0.431 |
0.517 |
0.265 |
0.1324 |
0.1103 |
4/0 EK |
4x. 1143” |
15x. 1143” |
0.571 |
4/0 |
15,370 |
3951 |
0.01903 |
490 |
0.274 |
0.277 |
0.278 |
0.279 |
0.300 |
0.304 |
0.307 |
0.308 |
0.200 |
0.401 |
0.481 |
0.266 |
0.1331 |
0.1109 |
4/0 V |
3x. 1361” |
9x. 1472” |
0.586 |
4/0 |
15,000 |
3977 |
0.01758 |
470 |
0.274 |
0.281 |
0.288 |
0.291 |
0.299 |
0.311 |
0.323 |
0.328 |
0.204 |
0.409 |
0.490 |
0.264 |
0.1322 |
0.1101 |
4/0 F |
1x. 1833” |
6x. 1833” |
0.550 |
4/0 |
12,290 |
3750 |
0.01558” |
470 |
0.273 |
0.280 |
0.285 |
0.287 |
0.299 |
0.309 |
0.318 |
0.322 |
0.210 |
0.421 |
0.505 |
0.269 |
0.1344 |
0.1220 |
3/0 E |
7x. 1091” |
12x. 1091” |
0.545 |
3/0 |
16,800 |
3522 |
0.01521 |
420 |
0.346 |
0.353 |
0.359 |
0.361 |
0.378 |
0.391 |
0.402 |
0.407 |
0.212 |
0.423 |
0.608 |
0.270 |
0.1348 |
0.1123 |
3/0 J |
3x. 1851” |
4x.1851” |
0.555 |
3/0 |
16,170 |
3732 |
0.01158 |
410 |
0.344 |
0.356 |
0.367 |
0.372 |
0.377 |
0.398 |
0.419 |
0.428 |
0.225 |
0.451 |
0.541 |
0.268 |
0.1341 |
0.1118 |
310 G |
2x. 1731” |
2x. 1731” |
0.519 |
3/0 |
12,860 |
3305 |
0.01254 |
400 |
0.344 |
0.355 |
0.365 |
0.369 |
0.377 |
0.397 |
0.416 |
0.423 |
0.221 |
0.443 |
0.531 |
0.273 |
0.1365 |
0.1137 |
3/0 EK |
4x. 1018” |
4x. 1018” |
0.509 |
3/0 |
12,370 |
3134 |
0.01697 |
420 |
0.346 |
0.348 |
0.350 |
0.351 |
0.378 |
0.382 |
0.386 |
0.386 |
0.206 |
0.412 |
0.495 |
0.274 |
0.1372 |
0.1143 |
3/0 V |
3x. 1311” |
9x.1311” |
0.522 |
3/0 |
12,220 |
3154 |
0.01566 |
410 |
0.345 |
0.352 |
0.360 |
0.362 |
0.377 |
0.390 |
0.403 |
0.408 |
0.210 |
0.420 |
0.504 |
0.273 |
0.1363 |
0.1136 |
3/0 F |
1x. 1632” |
6x. 1632” |
0.490 |
3/0 |
9980 |
2974 |
0.01388 |
410 |
0.344 |
0.351 |
0.366 |
0.358 |
0.377 |
0.388 |
0.397 |
0.401 |
0.216 |
0.432 |
0.519 |
0.277 |
0.1385 |
0.1155 |
2/0 K |
4x. 1780” |
3x. 1780” |
0.534 |
2/0 |
17,600 |
3411 |
0.00912 |
360 |
0.434 |
0.447 |
0.459 |
0.466 |
0.475 |
0.499 |
0.524 |
0.535 |
0.237 |
0.476 |
0.570 |
0.271 |
0.1355 |
0.1129 |
2/0 J |
3x. 1648” |
4x. 1648” |
0.494 |
2/0 |
13,430 |
2960 |
0.01029 |
350 |
0.434 |
0.446 |
0.457 |
0.462 |
0.475 |
0.498 |
0.520 |
0.530 |
0.231 |
0.463 |
0.555 |
0.277 |
0.1383 |
0.1152 |
2/0 G |
2x. 1542” |
6x. 1542” |
0.463 |
2/0 |
10,510 |
2622 |
0.01119 |
350 |
0.434 |
0.445 |
0.456 |
0.459 |
0.475 |
0.497 |
0.518 |
0.526 |
0.227 |
0.454 |
0.545 |
0.281 |
0.1406 |
0.1171 |
2/0 V |
3x. 1080” |
9x. 1167” |
0.465 |
2/0 |
9,846 |
2502 |
0.01395 |
360 |
0.435 |
0.442 |
0.450 |
0.452 |
0.476 |
0.489 |
0.504 |
0.509 |
0.216 |
0.432 |
0.518 |
0.281 |
0.1404 |
0.1170 |
2/0 F |
1x. 1454” |
6x. 1454” |
0.436 |
2/0 |
8,094 |
2359 |
0.01235 |
350 |
0.434 |
0.441 |
0.446 |
0.448 |
0.475 |
0.487 |
0.497 |
0.501 |
0.222 |
0.444 |
0.533 |
0.285 |
0.1427 |
0.1189 |
1/0 K |
4x. 1585” |
3x. 1585” |
0.475 |
1/0 |
14,490 |
2703 |
0.00812 |
310 |
0.548 |
0.560 |
0.573 |
0.579 |
0.599 |
0.625 |
0.652 |
0.664 |
0.243 |
0.487 |
0.584 |
0.279 |
0.1397 |
0.1164 |
1/0 J |
3x. 1467” |
4x. 1467” |
0.440 |
1/0 |
10,970 |
2346 |
0.00917 |
310 |
0.548 |
0.559 |
0.570 |
0.576 |
0.699 |
0.624 |
0.648 |
0.659 |
0.237 |
0.474 |
0.589 |
0.285 |
0.1423 |
0.1188 |
1/0 G |
2x. 1373” |
5x. 1373” |
0.412 |
1/0 |
8,563 |
2078 |
0.00995 |
310 |
0.548 |
0.559 |
0.568 |
0.573 |
0.699 |
0.623 |
0.645 |
0.654 |
0.233 |
0.466 |
0.559 |
0.289 |
0.1447 |
0.1206 |
1/0 F |
1x. 1294” |
6x. 1294” |
0.388 |
1/0 |
6,536 |
1870 |
0.01099 |
310 |
0.548 |
0.554 |
0.559 |
0.562 |
0.599 |
0.612 |
0.622 |
0.627 |
0.228 |
0.456 |
0.547 |
0.294 |
0.1469 |
0.1224 |
1 N |
5x. 1546” |
2x. 1546” |
0.464 |
1 |
15,410 |
2541 |
0.00638 |
280 |
0.691 |
0.705 |
0.719 |
0.726 |
0.755 |
0.787 |
0.818 |
0.832 |
0.256 |
0.512 |
0.614 |
0.281 |
0.1405 |
0.1171 |
1 K |
4x. 1412” |
3x. 1412” |
0.423 |
1 |
11,900 |
2144 |
0.00723 |
270 |
0.691 |
0.704 |
0.716 |
0.722 |
0.755 |
0.784 |
0.813 |
0.825 |
0.249 |
0.498 |
0.598 |
0.288 |
0.1438 |
0.1198 |
1 J |
3x. 1307” |
4x. 1307” |
0.392 |
1 |
9,000 |
1881 |
0.00817 |
270 |
0.691 |
0.703 |
0.714 |
0.719 |
0.755 |
0.783 |
0.808 |
0.820 |
0.243 |
0.486 |
0.583 |
0.293 |
0.1465 |
0.1221 |
1 G |
2x. 1222” |
5x. 1222” |
0.367 |
1 |
6,956 |
1649 |
0.00887 |
260 |
0.691 |
0.702 |
0.712 |
0.716 |
0.755 |
0.781 |
0.805 |
0.815 |
0.239 |
0.478 |
0.573 |
0.298 |
0.1488 |
0.1240 |
1 F |
1x. 1153” |
6x. 1153” |
0.346 |
1 |
5,266 |
1483 |
0.00980 |
270 |
0.691 |
0.698 |
0.704 |
0.705 |
0.755 |
0.769 |
0.781 |
0.786 |
0.234 |
0.468 |
0.561 |
0.302 |
0.1509 |
0.1258 |
2 P |
6x. 1540” |
1x. 1540” |
0.452 |
2 |
16,870 |
2487 |
0.00501 |
250 |
0.871 |
0.886 |
0.901 |
0.909 |
0.952 |
0.988 |
1.024 |
1.040 |
0.268 |
0.536 |
0.643 |
0.281 |
0.1406 |
0.1172 |
2 N |
5x. 1377” |
2x. 1377” |
0.413 |
2 |
12,880 |
2015 |
0.00568 |
240 |
0.871 |
0.885 |
0.899 |
0.906 |
0.952 |
0.986 |
1.020 |
1.035 |
0.261 |
0.523 |
0.627 |
0.289 |
0.1445 |
0.1208 |
2 K |
4x. 1257” |
3x. 1257” |
0.377 |
2 |
9,730 |
1701 |
0.00644 |
240 |
0.871 |
0.884 |
0.896 |
0.902 |
0.952 |
0.983 |
1.014 |
1.028 |
0.255 |
0.510 |
0.612 |
0.296 |
0.1479 |
0.1232 |
2 J |
3x. 1164” |
4x.1164” |
0.349 |
2 |
7,322 |
1476 |
0.00727 |
230 |
0.871 |
0.883 |
0.894 |
0.899 |
0.952 |
0.982 |
1.010 |
1.022 |
0.249 |
0.498 |
0.598 |
0.301 |
0.1506 |
0.1255 |
2 A |
1x. 1699” |
2x.1699” |
0.366 |
2 |
5,876 |
1356 |
0.00763 |
240 |
0.869 |
0.875 |
0.880 |
0.882 |
0.950 |
0.962 |
0.973 |
0.979 |
0.247 |
0.493 |
0.592 |
0.298 |
0.1489 |
0.1241 |
2 G |
2x. 1089” |
5x.1089” |
0.327 |
2 |
5,626 |
1307 |
0.00790 |
230 |
0.871 |
0.882 |
0.892 |
0.896 |
0.952 |
0.980 |
1.006 |
1.016 |
0.246 |
0.489 |
0.587 |
0.306 |
0.1529 |
0.1276 |
2 F |
1x. 1026” |
6x. 1026” |
0.308 |
2 |
4,233 |
1176 |
0.00873 |
230 |
0.871 |
0.878 |
0.884 |
0.885 |
0.952 |
0.967 |
0.979 |
0.986 |
0.230 |
0.479 |
0.576 |
0.310 |
0.1551 |
0.1292 |
3 P |
6x. 1371” |
1x. 1371” |
0.411 |
3 |
13,910 |
1973 |
0.00445 |
220 |
1.098 |
1.113 |
1.127 |
1.136 |
1.200 |
1.239 |
1.273 |
1.296 |
0.274 |
0.647 |
0.657 |
0.290 |
0.1448 |
0.1207 |
3 N |
5x. 1226” |
2x. 1226” |
0.368 |
3 |
10,390 |
1598 |
0.00506 |
210 |
1.098 |
1.112 |
1.126 |
1.133 |
1.200 |
1.237 |
1.273 |
1.289 |
0.267 |
0.634 |
0.641 |
0.298 |
0.1487 |
0.1239 |
3 K |
4x. 1120” |
3x. 1120” |
0.336 |
3 |
7,910 |
1349 |
0.00674 |
210 |
1.098 |
1.111 |
1.123 |
1.129 |
1.200 |
1.233 |
1.267 |
1.281 |
0.261 |
0.622 |
0.626 |
0.304 |
0.1520 |
0.1266 |
3 J |
3x. 1036” |
4x. 1036” |
0.311 |
3 |
5,956 |
1171 |
0.00648 |
200 |
1.098 |
1.110 |
1.121 |
1.126 |
1.200 |
1.232 |
1.262 |
1.275 |
0.255 |
0.609 |
0.611 |
0.309 |
0.1547 |
0.1289 |
3 A |
1x. 1513” |
2x. 1513” |
0.326 |
3 |
4,810 |
1075 |
0.00679 |
210 |
1.096 |
1.102 |
1.107 |
1.109 |
1.198 |
1.211 |
1.226 |
1.229 |
0.252 |
0.606 |
0.606 |
0.306 |
0.1531 |
0.1275 |
4 P |
6x. 1221” |
1x. 1221” |
0.366 |
4 |
11,420 |
1584 |
0.00397 |
190 |
1.385 |
1.400 |
1.414 |
1.423 |
1.514 |
1.555 |
1.598 |
1.616 |
0.280 |
0.559 |
0.671 |
0.298 |
0.1489 |
0.1241 |
4 N |
5x. 1092” |
2x. 1092” |
0.328 |
4 |
8,460 |
1267 |
0.00.451 |
180 |
1.385 |
1.399 |
1.413 |
1.420 |
1.514 |
1.554 |
1.593 |
1.610 |
0.273 |
0.546 |
0.655 |
0.306 |
0.1528 |
0.1274 |
4 D |
2x. 1615” |
1x. 1615” |
0.348 |
4 |
7,340 |
1191 |
0.00586 |
190 |
1.382 |
1.389 |
1.396 |
1.399 |
1.511 |
1.529 |
1.544 |
1.542 |
0.262 |
0.523 |
0.628 |
0.301 |
0.1507 |
0.1256 |
4 A |
1x. 1347” |
2x. 1347” |
0.290 |
4 |
3,938 |
853 |
0.00604 |
180 |
1.382 |
1.388 |
1.393 |
1.395 |
1.511 |
1.525 |
1.540 |
1.545 |
0.258 |
0.517 |
0.620 |
0.316 |
0.1572 |
0.1310 |
5 P |
6x. 1087” |
1x. 1087” |
0.326 |
5 |
9,311 |
1240 |
0.00353 |
160 |
1.747 |
1.762 |
1.776 |
1.785 |
1.909 |
1.954 |
2.00 |
2.02 |
0.285 |
0.571 |
0.685 |
0.306 |
0.1531 |
0.1275 |
5 D |
2x. 1438” |
1x. 1438” |
0.310 |
5 |
6,035 |
944 |
0.00504 |
160 |
1.742 |
1.749 |
1.756 |
1.759 |
1.905 |
1.924 |
1.941 |
1.939 |
0.268 |
0.535 |
0.642 |
0.310 |
0.1548 |
0.1290 |
5 A |
1x. 1200” |
2x. 1200” |
0.258 |
5 |
3,193 |
675 |
0.00538 |
160 |
1.742 |
1.748 |
1.753 |
1.755 |
1.905 |
1.920 |
1.938 |
1.941 |
0.264 |
0.528 |
0.634 |
0.323 |
0.1514 |
0.1245 |
6 D |
2x. 1281” |
1x. 1281” |
0.276 |
6 |
4,942 |
749 |
0.00449 |
140 |
2.20 |
2.21 |
2.21 |
2.22 |
2.40 |
2.42 |
2.44 |
2.44 |
0.273 |
0.547 |
0.555 |
0.318 |
0.1590 |
0.1325 |
6 A |
1x. 1068” |
2x. 1068” |
0.230 |
6 |
2,585 |
536 |
0.00479 |
140 |
2.20 |
2.20 |
2.21 |
2.21 |
2.40 |
2.42 |
2.44 |
2.44 |
0.270 |
0.540 |
0.648 |
0.331 |
0.1655 |
0.1379 |
6 C |
1x. 1046” |
2x. 1046” |
0.225 |
6 |
2,143 |
514 |
0.00469 |
130 |
2.20 |
2.20 |
2.21 |
2.21 |
2.40 |
2.42 |
2.44 |
2.44 |
0.271 |
0.542 |
0.651 |
0.333 |
0.1663 |
0.1384 |
7 D |
2x. 1141” |
1x. 1141” |
0.246 |
7 |
4,022 |
594 |
0.00400 |
120 |
2.77 |
2.78 |
2.79 |
2.79 |
3.03 |
3.06 |
3.07 |
3.07 |
0.279 |
0.558 |
0.670 |
0.326 |
0.1831 |
0.1359 |
7 A |
1x. 1266” |
2x. 0895” |
0.223 |
7 |
2,754 |
495 |
0.00441 |
120 |
2.77 |
2.78 |
2.78 |
2.78 |
3.03 |
3.06 |
3.07 |
3.07 |
0.274 |
0.548 |
0.658 |
0.333 |
0.1665 |
0.1388 |
8 D |
2x. 1016” |
1x. 1016” |
0.219 |
8 |
3,256 |
471 |
0.00356 |
110 |
3.49 |
3.50 |
3.51 |
3.51 |
3.82 |
3.84 |
3.86 |
3.86 |
0.285 |
0.570 |
0.684 |
0.334 |
0.1872 |
0.1392 |
8 A |
1x. 1127” |
2x. 0797” |
0.199 |
8 |
2,233 |
392 |
0.00394 |
100 |
3.49 |
3.50 |
3.51 |
3.51 |
3.82 |
3.84 |
3.86 |
3.87 |
0.280 |
0.560 |
0.672 |
0.341 |
0.1706 |
0.1422 |
8 C |
1x. 0808” |
2x. 0834” |
0.179 |
8 |
1,362 |
320 |
0.00373 |
100 |
3.49 |
3.50 |
3.51 |
3.51 |
3.82 |
3.84 |
3.86 |
3.86 |
0.283 |
0.565 |
0.679 |
0.349 |
0.1744 |
0.1453 |
9½D |
2x. 0808” |
1x. 0808” |
0.174 |
9½ |
1,743 |
298 |
0.00283 |
85 |
4.91 |
4.92 |
4.92 |
4.93 |
5.37 |
5.39 |
5.42 |
5.42 |
0.297 |
0.593 |
0.712 |
0.351 |
0.1754 |
0.1462 |
Source: Westinghouse Electric Corporation, Electric Utility Engineering Reference Book—Distribution Systems, East Pittsburgh, PA, 1965.
a Based on a conductor temperature of 75°C and an ambient of 25°C wind 1.4 mi/h (2 ft/s), (frequency = 60 cycles, average tarnished surface).
b Resistances at 50°C total temperature, based on an ambient of 25°C plus 25°C rise due to heating effect of current. The of approximate magnitude of the current necessary to produce the 25°C rise is 75% of the “approximate current-carrying capacity 60 cycles.”