Busbar Electrical Ampacity Chart

Busbar Electrical Ampacity Charts

TABLE 1. AMPACITIES OF COPPER BUSBARS ALLOY 11000

Dimension, In. Area Weight Per Ft in Lb. DC Resistance at 20 C, Microhms/Ft. 30 C Rise 50 C Rise 65 C Rise Area 30 C Rice 50 C Rice 65 C Rice 30 C Rice 50 C Rice 65 C Rice
Sq. In Circ Mils Thousands Skin Effect Ratio at 90 C 60Hz Ampacity Amp* Skin Effect Ratio at 90 C 60 Hz Ampacity Amp* Skin Effect Ratio at 90 C 60 Hz Ampacity Amp* mm2 Density A/mm2 Density A/mm2 Density A/mm2 Density A/in2 Density A/in2 Density A/in2
1/16 x 1/2 0.0312 39.7 0.121 264 1 103 1 136 1 157 20.1 5.1 6.8 7.8 3301 4359 5032
1/16 x 3/4 0.0469 59.7 0.181 175 1 145 1 193 1 225 30.3 4.8 6.4 7.4 3092 4115 4797
1/16 x 1 0.0625 79.6 0.241 1321 187 1 250 1 285 40.3 4.6 6.2 7.1 2992 4000 4560
1/16 x 1 1/2 0.0938 119 0.362 87.7 1 270 1 355 1 410 60.5 4.5 5.9 6.8 2878 3785 4371
1/16 x 2 0.125 159 0.483 65.8 1.01 345 1.01 460 1.01 530 80.6 4.3 5.7 6.6 2760 3680 4240

1/8 x 1/2 0.0625 79.6 0.241 132 1 153 1 205 1 235 40.3 3.8 5.1 5.8 2448 3280 3760
1/8 x 3/4 0.0938 119 0.362 87.7 1 215 1 285 1 325 60.5 3.6 4.75.4 2292 3038 3465
1/8 x 1 0.125 159 0.483 65.8 1.01 270 1.01 360 1.01 415 80.6 3.3 4.5 5.1 2160 2880 3320
1/8 x 1 1/2 0.188 239 0.726 43.8 1.01 385 1.01 510 1.01 590 121.3 3.2 4.2 4.9 2048 2713 3138
1/8 x 2 0.25 318 0.966 32.9 1.02 495 1.02 660 1.02 760 161.3 3.1 4.1 4.7 1980 2640 3040
1/8 x 2 1/2 0.312 397 1.21 26.4 1.02 600 1.02 800 1.02 920 201.3 3.0 4.0 4.6 1923 2564 2949
1/8 x 3 0.375477 1.45 21.9 1.03 710 1.03 940 1.03 1100 241.9 2.9 3.9 4.5 1893 2507 2933
1/8 x 3 1/2 0.438 558 1.69 18.8 1.04 810 1.03 1100 1.03 1250 282.6 2.9 3.9 4.4 1849 2511 2854
1/8 x 4 0.5 636 1.93 16.5 1.04 900 1.04 1200 1.04 1400 322.6 2.8 3.7 4.3 1800 2400 2800

3/16 x 1/2 0.0938 119 0.362 87.7 1 195 1 260 1 300 60.5 3.2 4.3 5.0 2079 2772 3198
3/16 x 3/4 0.141 179 0.545 58.41.01 270 1.01 360 1.01 415 91.0 3.0 4.0 4.6 1915 2553 2943
3/16 x 1 0.188 239 0.726 43.8 1.01 340 1.01 455 1.01 520 121.3 2.8 3.8 4.3 1809 2420 2766
3/16 x 1 1/2 0.281 358 1.09 29.3 1.02 480 1.02 630 1.02 730 181.3 2.6 3.5 4.0 1708 2242 2598
3/16 x 2 0.375 477 1.45 21.9 1.03 610 1.03 810 1.03 940 241.9 2.5 3.3 3.9 1627 2160 2507
3/16 x 2 1/2 0.469 597 1.81 17.5 1.04 740 1.04 980 1.03 1150302.6 2.4 3.2 3.8 1578 2090 2452
3/16 x 3 0.562 715 2.17 14.6 1.05 870 1.05 1150 1.04 1350 362.6 2.4 3.2 3.7 1548 2046 2402
3/16 x 3 1/2 0.656 835 2.53 12.5 1.07 990 1.06 1300 1.06 1500 423.2 2.3 3.1 3.5 1509 1982 2287
3/16 x 4 0.75 955 2.9 11 1.09 1100 1.08 1450 1.07 1700 483.9 2.3 3.0 3.5 1467 1933 2267

1/4 x 1/2 0.125 159 0.483 65.8 1.01 240 1.01 315 1.01 360 80.63.0 3.9 4.5 1920 2520 2880
1/4 x 3/4 0.188 239 0.726 43.8 1.01 320 1.01 425 1.01 490 121.3 2.6 3.5 4.0 1702 2261 2606
1/4 x 1 0.25 318 0.966 32.9 1.02 400 1.02 530 1.02 620 161.3 2.5 3.3 3.8 1600 2120 2480
1/4 x 1 1/2 0.375 477 1.45 21.9 1.03 560 1.03 740 1.03 860 241.9 2.3 3.1 3.6 1493 1973 2293
1/4 x 2 0.5 637 1.93 16.5 1.04 710 1.04 940 1.04 1100 322.6 2.2 2.9 3.4 1420 1880 2200
1/4 x2 1/2 0.625 796 2.41 13.2 1.06 850 1.06 1150 1.06 1300 403.2 2.1 2.9 3.2 1360 1840 2080
1/4 x 3 0.75 955 2.9 11 1.08 990 1.08 1300 1.07 1550 483.9 2.0 2.7 3.2 1320 1733 2067
1/4 x 3 1/2 0.875 1110 3.38 9.4 1.1 1150 1.09 1500 1.09 1750 564.5 2.0 2.7 3.1 1314 1714 2000
1/4 x 4 1 1270 3.86 8.23 1.12 1250 1.11 1700 1.1 1950 645.2 1.9 2.6 3.0 1250 1700 1950
1/4 x 5 1.25 1590 4.83 6.58 1.161500 1.15 2000 1.14 2350 806.5 1.9 2.5 2.9 1200 1600 1880
1/4 x 6 1.5 1910 5.8 5.49 1.18 1750 1.17 2350 1.17 2700 967.7 1.8 2.4 2.8 1167 1567 1800

3/8 x 3/4 0.281 358 1.09 29.3 1.02 415 1.02 550 1.02 630 181.3 2.3 3.0 3.5 1477 1957 2242
3/8 x 1 0.375 477 1.45 21.9 1.03 510 1.03 680 1.03 790 241.9 2.1 2.8 3.3 1360 1813 2107
3/8 x 1 1/2 0.562 715 2.17 14.6 1.05 710 1.04...