busbar index

Tables of Properties of HC Copper Conductors

Table 12. Current ratings, moments of inertia and section moduli - strips and bars

  Approx. d.c. rating (1) Approx. a.c. (2) rating Moment of inertia, I Modulus of Section, Z  
Busbar Size mm X-Sectional area mm2 Weight kg/m Approx d.c.resistance 20°C mW/m Still air (3)A Free air (3)A Still air A Free air  A Edgewise mm4 Flat
mm4		 Edgewise
mm3		 Flat
mm3		 Busbar size mm
10 x 1.60 16.0 0.143 1077 105 115 105 115 133.3 3.413 26.66 4.266 10 x 1.60
12.5 x 1.60 20.0 0.179 862 125 135 125 135 260.4 4.266 41.66 5.333 12.5 x 1.60
16 x 1.60 25.6 0.229 673 155 170 155 170 546.1 5.461 68.26 6.826 16 x 1.60
20 x 1.60 32.0 0.286 538 185 205 185 205 1066 6.826 106.6 8.533 20 x 1.60
25 x 1.60 40.0 0.357 431 225 250 225 250 2083 8.533 166.6 10.67 25 x 1.60
30 x 1.60 48.0 0.429 359 265 290 265 290 3600 10.24 240.0 12.80 30 x 1.60
10 x 2.00 20.0 0.179 862 115 130 115 130 166.6 6.666 33.32 6.666 10 x 2.00
12.5 x 2.00 25.0 0.223 689 140 155 140 155 325.5 8.333 52.08 8.333 12.5 x 2.00
16 x 2.00 32.0 0.286 538 175 190 175 190 682.6 10.66 85.33 10.66 16 x 2.00
20 x 2.00 40.0 0.357 431 210 230 210 230 1333 13.33 133.3 13.33 20 x 2.00
25 x 2.00 50.0 0.446 344 255 280 255 280 2604 16.66 208.3 16.66 25 x 2.00
30 x 2.00 60.0 0.536 287 295 330 295 330 4500 20.00 300 20.00 30 x 2.00
40 x 2.00 80.0 0.714 215 380 420 380 420 10660 26.66 533 26.66 40 x 2.00
10 x 2.50 25.0 0.223 689 130 145 130 145 208.3 13.02 41.66 10.42 10 x 2.50
12.5 x 2.50 31.25 0.279 557 160 175 160 175 406.9 16.27 65.60 13.02 12.5 x 2.50
16 x 2.50 40.0 0.357 431 195 215 195 215 853.3 20.83 106.70 16.66 16 x 2.50
20 x 2.50 50.0 0.446 344 235 260 235 260 1666 26.04 166.6 20.83 20 x 2.50
25 x 2.50 62.5 0.558 275 285 315 285 315 3255 32.55 260.4 26.04 25 x 2.50
30 x 2.50 75.0 0.670 229 330 370 330 370 5625 39.06 375.0 31.25 30 x 2.50
40 x 2.50 100 0.893 172 425 475 425 475 13330 52.08 666.5 41.66 40 x 2.50
50 x 2.50 125 1.115 137 520 575 520 575 26040 65.10 1041 52.08 50 x 2.50
60 x 2.50 150 1.339 114 605 675 605 675 45000 78.13 1500 62.50 60 x 2.50
10 x 2.75 31.5 0.281 547 150 170 150 170 262.5 26.05 52.5 16.54 10 x 2.75
12.5 x 2.75 39.4 0.352 437 180 200 180 200 512.7 32.56 82.03 20.67 12.5 x 2.75
16 x 2.75 50.4 0.450 342 220 245 220 245 1075 41.67 134.4 26.46 16 x 2.75
20 x 3.0 60.0 0.536 287 260 290 260 290 2000 45.00 200.0 30.00 20 x 3.0
25 x 3.0 75 0.670 229 315 350 314 350 3906 56.25 312.4 37.5 25 x 3.0
30 x 3.0 90 0.803 191 365 405 365 405 6750 67.50 450.0 45.0 30 x 3.0
40 x 3.0 120 1.071 143 470 520 470 520 16000 90.00 800.0 60.0 40 x 3.0
50 x 3.0 150 1.339 114 570 635 570 635 31250 112.50 1250 75.0 50 x 3.0
60 x 3.0 180 1.607 95.7 665 740 665 740 54000 135.00 1800 90.0 60 x 3.0
80 x 3.0 240 2.142 71.8 860 955 860 955 128 x 103 180.00 3200 120.0 80 x 3.0
10 x 4.0 40 0.357 431 175 195 175 195 333.3 53.33 66.66 26.67 10 x 4.0
12.5 x 4.0 50 0.446 344 210 230 210 230 651.0 66.67 104.2 33.34 12.5 x 4.0
16 x 4.0 64 0.571 269 255 285 255 285 1365 85.33 170.6 42.67 16 x 4.0
20 x 4.0 80 0.714 215 305 340 305 340 2666 106.7 266.6 53.35 20 x 4.0
25 x 4.0 100 0.893 172 365 410 365 410 5208 133.3 416.6 66.65 25 x 4.0
30 x 4.0 120 1.071 143 430 475 430 475 8999 1600 599.6 80.00 30 x 4.0
40 x 4.0 160 1.428 107 545 610 540 605 21330 213.3 1066.5 106.7 40 x 4.0
50 x 4.0 200 1.785 86.2 665 740 660 735 41660 266.7 1666 133.4 50 x 4.0
60 x 4.0 240 2.142 71.8 775 860 770 855 72000 320.0 2400 160.0 60 x 4.0
80 x 4.0 320 2.856 53.8 995 1120 980 1105 170 x 10E3 426.7 4268 213.4 80 x 4.0
100 x 4.0 400 3.571 43.1 1210 1365 1185 1340 333 x 10E3 533.3 6666 266.7 100 x 4.0
10 x 5.0 50 0.446 344 200 225 200 225 416.7 104.2 83.34 41.68 10 x 5.0
12.5 x 5.0 62.5 0.558 275 240 265 240 265 813.4 130.2 130.1 52.08 12.5 x 5.0
16 x 5.0 80 0.714 215 290 325 290 325 1707 166.7 213.4 66.68 16 x 5.0
20 x 5.0 100 0.893 172 345 385 345 385 3333 208 333.3 83.20 20 x 5.0
25 x 5.0 125 1.116 137 415 465 415 465 6560 260.4 520.8 104.2 25 x 5.0
30 x 5.0 150 1.339 114 485 540 480 540 11250 312.5 750.0 125.0 30 x 5.0
40 x 5.0 200 1.785 86.2 615 685 610 680 26670 416.7 1334 166.7 40 x 5.0
50 x 5.0 250 2.232 68.9 745 830 740 820 52080 520.8 2083 208.3 50 x 5.0
60 x 5.0 300 2.678 57.4 870 970 865 960 90000 625.0 3000 250.0 60 x 5.0
80 x 5.0 400 3571 431 1120 1260 1110 1250 213 x 10E3 833.3 5333 333.3 80 x 5.0
100 x 5.0 500 4464 344 1355 1530 1345 1520 417 x 10E3 1042 8334 416.8 100 x 5.0
10 x 6.3 63 0.562 273 235 260 235 260 525 208.4 105.0 66.16 10 x 6.3
12.5 x 6.3 78.75 0.703 218 275 305 275 305 1025 260.5 164.0 82.70 12.5 x 6.3
16 x 6.3 100.8 0.899 171 335 370 335 370 2150 333.4 268.8 105.8 16 x 6.3
20 x 6.0 120 1.071 143 385 430 385 430 4000 360.0 400.0 120.0 20 x 6.0
25 x 6.0 150 1.339 114 460 515 460 515 7813 450.0 625.0 150.0 25 x 6.0
30 x 6.0 180 1.607 95.7 535 600 535 595 13500 540.0 900.0 180.0 30 x 6.0
40 x 6.0 240 2.142 71.8 680 760 675 755 32000 720.0 1600 240.0 40 x 6.0
50 x 6.0 300 2.678 57.4 825 915 815 910 62500 900.0 2500 300.0 50 x 6.0
60 x 6.0 360 3.214 47.8 965 1075 955 1065 108 x 10E3 1080 3600 360.0 60 x 6.0
80 x 6.0 480 4.285 35.9 1230 1370 1220 1355 256 x10E3 1440 6400 480.0 80 x 6.0
100 x 6.0 600 5.356 28.7 1490 1680 1480 1670 500 x10E3 1800 10000 600.0 100 x 6.0
120 x 6.0 720 6.428 23.9 1750 1970 1700 1915 864 x10E3 2160 14400 720.0 120 x 6.0
160 x 6.0 960 8.570 17.9 2250 2535 2130 2400 2.05 x10E6 2880 25600 960.0 160 x 6.0
20 x 8.0 160 1.428 107 460 510 455 510 5333 853.3 533.0 213.3 20 x 8.0
25 x 8.0 200 1.785 86.2 545 610 545 605 10420 1067 833.6 266.7 25 x 8.0
30 x 8.0 240 2.142 71.8 630 705 630 700 18000 1280 1200 320.0 30 x 8.0
40 x 8.0 320 2.856 53.8 800 890 795 885 42670 1707 2134 426.8 40 x 8.0
50 x 8.0 400 3.571 43.1 965 1070 950 1055 83300 2133 3333 533.3 50 x 8.0
60 x 8.0 480 4.285 35.9 1120 1250 1110 1235 144 x 10E3 2560 4800 640.0 60 x 8.0
80 x 8.0 640 5.713 26.9 1435 1595 1420 1580 341 x 10E3 3413 8533 853.3 80 x 8.0
100 x 8.0 800 7.142 21.5 1735 1955 1595 1800 667 x 10E3 4267 13330 1067 100 x 8.0
120 x 8.0 960 8.570 17.9 2032 2290 1760 1985 1.15 x 10E6 5120 19200 1280 120 x 8.0
160 x 8.0 1280 11.43 13.4 2610 2935 2230 2510 2.73 x 10E6 6827 34140 1707 160 x 8.0
200 x 8.0 1600 14.27 10.8 3170 3570 2760 3110 5.33 x 10E6 8533 53330 2133 200 x 8.0
20 x 10 200 1.785 86.2 525 585 480 535 6670 1667 667 333.4 20 x 10
25 x 10 250 2.232 68.9 625 695 580 645 13020 2083 1042 416.6 25 x 10
30 x 10 300 2.678 57.4 720 825 700 795 22500 2500 1500 500.0 30 x 10
40 x 10 400 3.571 43.1 910 1030 880 995 53330 3333 2667 666.6 40 x 10
50 x 10 500 4.464 34.4 1090 1235 1060 1200 104 x 10E3 4167 4168 833.4 50 x l0
60 x 10 600 5.356 28.7 1270 1435 1200 1355 180 x 10E3 5000 6000 1000 60 x 10
80 x 10 800 7.142 21.5 1615 1840 1525 1735 427 x 10E3 6667 10670 1333 80 x 10
100 x 10 1000 8.928 17.2 1950 2225 1800 2065 833 x 10E3 8333 16670 1667 100 x 10
120 x 10 1200 10.71 14.3 2285 2610 2100 2395 144 x 10E3 10000 23980 2000 120 x 10
160 x 10 1600 14.28 10.7 2930 3380 2620 3040 341 x 10E3 13330 42660 2666 160 x 10
200 x 10 2000 17.84 8.62 3550 4150 3140 3630 6.67 x 10E6 16670 66670 3334 200 x 10
250 x 10 2500 22.30 6.89 4320 5030 3710 4310 13.0 x 10E6 20830 104 x 103 4166 250 x 10
25 x 12 300 2.678 57.4 700 710 640 650 15630 3599 1250 599.8 25 x 12
30 x 12 360 3.214 47.8 805 820 750 765 27000 4319 1800 719.8 30 x 12
40 x 12 480 4.285 35.9 1010 1100 950 1030 64000 5759 3200 959.8 40 x 12
50 x 12 600 5.356 28.7 1210 1330 1160 1275 125 x 10E3 7199 5000 1199 50 x 12
60 x 12 720 6.428 23.9 1405 1550 1320 1455 216 x 10E3 8639 7200 1439 60 x 12
80 x 12 960 8.570 17.9 1785 2000 1670 1870 512 x 10E3 11519 12800 1919 80 x 12
100 x 12 1200 10.71 14.3 2155 2420 2010 2255 1.00 x 10E6 14390 20000 2398 100 x 12
120 x 12 1440 12.85 11.9 2520 2880 2310 2640 1.73 x 10E6 17280 28800 2880 120 x 12
160 x 12 1920 17.14 8.97 3225 3650 2860 3235 4.10 x 10E6 23040 51200 3840 160 x 12
200 x 12 2400 21.43 7.18 3910 4480 3380 3870 8.00 x 10E6 28790 80000 4798 200 x 12
250 x 12 3000 26.78 5.74 4750 5440 4060 4650 15.6 x 10E6 35990 125 x 103 5998 250 x 12
25 x 16 400 3.571 43.1 840 960 740 855 20830 8533 16.7 x 103 1067 25 x 16
30 x 16 480 4.285 35.9 960 1095 845 975 35990 10240 24.0 x 103 1280 30 x 16
40 x 16 640 5.713 26.9 1200 1370 1055 1220 85330 13650 42.7 x 103 1706 40 x 16
50 x 16 800 7.142 21.5 1430 1635 1260 1450 167 x 10E3 17070 66.7 x 103 2134 50 x 16
60 x 16 960 8.570 17.9 1660 1895 1460 1685 288 x 10E3 20480 96.0 x 103 2560 60 x 16
80 x 16 1280 11.43 13,4 2100 2400 1850 2130 683 x 10E3 27310 171 x 103 3414 80 x 16
100 x 16 1600 14.28 10.7 2530 2880 2220 2560 1.33 x 10E6 34130 267 x 103 4266 100 x 16
120 x 16 1920 17.14 8.97 2940 3360 2590 2990 2.30 x 10E6 40960 384 x 103 5120 120 x 16
160 x 16 2560 22.85 6.73 3750 4360 3180 3700 5.46 x 10E6 54610 683 x 103 6826 160 x 16
200 x 16 3200 28.57 5.38 4540 5725 3760 4370 10.7 x 10E6 68270 1.07 x 106 8534 200 x 16
250 x 16 4000 35.71 4.31 5520 6425 4500 5250 20.8 x 10E6 85330 1.67 x 106 10670 250 x 16
300 x 16 4800 42.84 3.59 6460 7525 5270 6150 36.0 x 10E6 102 x 103 2.40 x 106 12800 300 x 16

 

Notes:

1. Ratings apply for single bars on edge operating in a 40°C ambient temperature with 50°C temperature rise. For other ambient and working temperatures apply formula 8, section 3.

2. a.c. ratings are for frequencies up to 60 Hz.

3. 'Free air' conditions assume some air movement other than convection currents, and may be applicable for outside installations. 'Still' and 'free' air conditions both assume no enclosure.