All Aluminum Alloy Conductor (AAAC) Cable – Overhead Transmission & Distribution – BS, IEC, ASTM, DIN

Overhead Line
Description

Product Overview

AAAC is mainly used as bare overhead transmission cable and as primary and secondary distribution cable. It is also suitable for laying across basins, rivers and valleys where special geographical features exist.

Standards: Basic design to BS 3242 / BS EN 50182 / IEC 61089 / ASTM B 399/B 399M / DIN 48201‑6 / AS 1531 standards.

Electrical Properties (at 20°C)

Property Value
Density 2.70 kg/dm³
Temperature Coefficient 0.00360 °C⁻¹
Resistivity 0.0326 Ω·mm²/m
Linear Expansivity 23 × 10⁻⁶ °C⁻¹

Service Conditions

Parameter Range
Ambient Temperature -5°C to 50°C
Wind Pressure 80 – 130 kg/m²
Seismic Acceleration 0.12 – 0.05 g
Isokeraunic Level 10 – 18
Relative Humidity 5 – 100%

Specifications

Property Details
ROHS Compliant ✓
Conductor Material Heat‑treatable magnesium‑silicon type aluminum alloy
Construction Concentrically stranded aluminum alloy wires
Advantages Lighter than ACSR, higher strength than pure aluminium, good for low ice/wind loadings

Construction

AAAC cable consists of aluminum alloy wires. The aluminum alloy wires are concentrically stranded.

This section deals with heat‑treatable magnesium‑silicon type aluminium alloys to the applicable International Standard, the electrical and mechanical properties of which all fall within the values suggested by relevant standard. Conductors to all other recognized specifications can also be supplied. The alloys referred to have higher strength but lower conductivity than pure aluminium.

Being lighter, alloy conductors can sometimes be used to advantage in place of the more conventional ACSR; having lower breaking loads than the latter, their use becomes particularly favourable when ice and wind loadings are low.

Technical Parameters

Table 1 – BS 3242 (AAAC)

Code AL Nominal Area (mm²) Cu Nominal Area Equivalent (mm²) Total Area (mm²) Stranding (No.×mm) Overall Diameter (mm) Weight (kg/km)
- - 6.45 11.7 7/1.47 4.41 32.2
Box - 9.68 18.8 7/1.85 5.55 51.7
Acacia - 12.9 21.9 7/2.08 6.24 66.1
Almond 25 16.1 30.1 7/2.34 7.02 82.9
Ceda 30 19.4 35.5 7/2.54 7.62 97.8
- 40 22.6 42.2 7/2.77 8.31 116.4
Fir 50 25.8 47.8 7/2.95 8.85 131.8
Hazel 100 32.3 59.9 7/3.30 9.9 165
Pine - 38.7 71.7 7/3.61 10.83 197.7
- - 45.2 84.1 7/3.91 11.73 231.6
Willow 150 48.4 89.8 7/4.04 12.12 247.5
- 175 51.6 96.5 7/4.19 12.57 266.2
- 300 58.1 108.8 7/4.45 13.35 299.8
Oak - 64.5 118.9 7/4.65 13.95 327.8
- - 80.6 118.8 19/2.82 14.1 327.6
Mulberry - 96.8 151.1 19/3.18 15.9 416.7
Ash - 113 180.7 19/3.48 17.4 498.1
Elm - 129 211 19/3.76 18.8 582.1
Poplar - 145 239 37/2.87 20.09 658.8
- - 161 270.8 37/3.05 21.35 746.7
Sycamore - 194 303 37/3.23 22.61 834.9
Upas - 226 362.1 37/3.53 24.71 998.6
- - 258 421.8 37/3.81 26.47 1163
Yew - - 479.9 37/4.06 28.42 1323

Table 2 – BS EN 50182 (AAAC)

Code Stranding (No.×mm) Nominal Area (mm²) Overall Diameter (mm) Weight (kg/km) Rated Strength (kN) Electrical Resistance (Ω/km) Current Rating* (A)
Box 7/1.85 18.8 5.55 51.4 5.55 1.748 87
Acacia 7/2.08 23.8 6.24 64.9 7.02 1.3828 101
Almond 7/2.34 30.1 7.02 82.2 8.88 1.0926 116
Cedar 7/2.54 35.5 7.62 96.8 10.46 0.9273 129
Deodar 7/2.77 42.2 8.31 115.2 12.44 0.7797 143
Fir 7/2.95 47.8 8.85 130.6 14.11 0.6875 155
Hazel 7/3.30 59.9 9.9 163.4 17.66 0.5494 178
Pine 7/3.61 71.6 10.83 195.6 21.14 0.4591 199
Holly 7/3.91 84.1 11.73 229.5 24.79 0.3913 219
Willow 7/4.04 89.7 12.12 245 26.47 0.3665 228
Oak 7/4.65 118.9 13.95 324.5 35.07 0.2767 272
Mulberry 19/3.18 150.9 15.9 414.3 44.52 0.2192 314
Ash 19/3.48 180.7 17.4 496.1 53.31 0.183 351
Elm 19/3.76 211 18.8 579.2 62.24 0.1568 386
Poplar 37/2.87 239.4 20.09 659.4 70.61 0.1387 416
Sycamore 37/3.23 303.2 22.61 835.2 89.4 0.1095 480
Upas 37/3.53 362.1 24.71 997.5 106.82 0.0917 535
Yew 37/4.06 479 28.42 1319.6 141.31 0.0693 633
Totara 37/4.14 498.1 28.98 1372.1 146.93 0.0666 648
Rubus 61/3.50 586.9 31.5 1622 173.13 0.0567 714
Sorbus 61/3.71 659.4 33.39 1822.5 194.53 0.0505 764
Araucaria 61/4.14 821.1 37.26 2269.4 242.24 0.0406 868
Redwood 61/4.56 996.2 41.04 2753.2 293.88 0.0334 970

Table 3 – IEC 61089 (AAAC)

Nominal Area (mm²) Stranding (No.×mm) Overall Diameter (mm) Weight (kg/km) Rated Strength (kN) Electrical Resistance (Ω/km) Current Rating* (A)
16 18.4 5.49 50.4 5.43 1.7896 86
25 28.8 6.87 78.7 8.49 1.1453 113
40 46 8.67 125.9 13.58 0.7158 151
63 72.5 10.89 198.3 21.39 0.4545 200
100 115 13.9 316.3 33.95 0.2877 266
125 144 15.5 395.4 42.44 0.2302 305
160 184 17.55 506.1 54.32 0.1798 355
200 230 19.65 632.7 67.91 0.1439 407
250 288 21.95 790.8 84.88 0.1151 466
315 363 24.71 998.9 106.95 0.0916 535
400 460 27.86 1268.4 135.81 0.0721 618
450 518 29.54 1426.9 152.79 0.0641 663
500 575 31.15 1585.5 169.76 0.0577 706
560 645 33.03 1778.4 190.14 0.0516 755
630 725 35.01 2000.7 213.9 0.0458 809
710 817 37.17 2254.8 241.07 0.0407 866
800 921 39.42 2540.6 271.62 0.0361 928
900* 1036 41.91 2861.1 305.58 0.0321 992
1000* 1151 44.11 3179 339.53 0.0289 1051
1120* 1289 46.75 3560.5 380.27 0.0258 1118
1250* 1439 49.39 3973.7 424.41 0.0231 1185

Table 4 – ASTM B 399 / B 399M (AWG/MCM)

AWG/MCM Nominal Area (mm²) Stranding (No.×mm) Overall Diameter (mm) Weight (kg/km) Rated Strength (kN) Electrical Resistance (Ω/km) Current Rating* (A)
6 13.2 7/1.55 4.65 36.2 4.18 2.5361 69
4 21.1 7/1.96 5.88 57.9 6.69 1.586 93
2 33.5 7/2.47 7.41 92 10.6 0.9987 123
0 53.5 7/3.12 9.36 146.8 17 0.62592 165
2/0 67.3 7/3.50 10.5 184.8 20.4 0.49738 190
3/0 84.9 7/3.93 11.79 233 25.7 0.3945 219
4/0 107 7/4.42 13.26 294.7 32.5 0.31188 253
250 126 19/2.91 14.55 346.7 38.8 0.26509 280
300 152 19/3.19 15.95 416.7 46.6 0.22059 313
350 178 19/3.45 17.25 487.3 52 0.1886 345
400 203 19/3.69 18.45 557.5 59.5 0.16486 375
450 228 19/3.91 19.55 626 66.8 0.14683 402
500 253 19/4.12 20.6 695 74.2 0.13224 429
550 279 37/3.10 21.7 766.2 83.9 0.11995 455
600 303 37/3.23 22.61 831.9 91 0.11049 478
650 330 37/3.37 23.59 905.5 94.9 0.1015 504
700 354 37/3.49 24.43 971.2 101 0.09464 525
750 381 37/3.62 25.34 1045 109 0.08796 549
800 404 37/3.73 26.11 1109 116 0.08285 569
900 456 37/3.96 27.72 1250 131 0.07351 612
1000 508 37/4.18 29.26 1393 146 0.06597 653
1250 631 61/3.63 32.67 1732 179 0.05306 743
1500 759 61/3.98 35.82 2082 215 0.04414 827
1750 886 61/4.30 38.7 2431 251 0.03781 904

Table 5 – DIN 48201 Part 6 (AAAC)

Nominal Area (mm²) Theoretical Area (mm²) Stranding (No.×mm) Overall Diameter (mm) Weight (kg/km) Rated Strength (kN) Electrical Resistance (Ω/km) Current Rating* (A)
16 15.89 7/1.70 5.1 43 4.44 2.0742 78
25 24.25 7/2.10 6.3 66 6.77 1.3593 102
35 34.36 7/2.50 7.5 94 9.6 0.9591 126
50 49.48 7/3.00 9 135 13.82 0.666 158
50 48.35 19/1.80 9 133 13.5 0.6849 156
70 65.81 19/2.10 10.5 181 18.38 0.5032 189
95 93.27 19/2.50 12.5 256 26.05 0.3551 234
120 116.99 19/2.80 14 322 32.68 0.2831 269
150 147.11 37/2.25 15.8 406 41.09 0.2256 309
185 181.62 37/2.50 17.5 500 50.73 0.1828 352
240 242.54 61/2.25 20.3 670 67.74 0.1371 420
300 299.43 61/2.50 22.5 827 83.63 0.111 477
400 400.14 61/2.89 26 1104 111.76 0.0831 568
500 499.83 61/3.23 29.1 1379 139.6 0.0665 649
625* 626.2 91/2.96 32.6 1732 174.9 0.0531 742
800* 802.09 91/3.35 36.9 2218 224.02 0.0415 857
1000* 999.71 91/3.74 41.1 2767 279.22 0.0333 971

Table 6 – AS 1531 (AAAC / 1120)

Code name Construction (No./mm) Sectional area (mm²) Calculated equivalent aluminium area (mm²) Approx. overall diameter (mm) Approx. weight (kg/km) Calculated breaking load (kN) Calculated DC resistance at 20°C (Ω/km)
Chlorine 7/2.50 34.4 32.8 7.5 94.3 8.18 0.864
Chromium 7/2.75 41.6 39.7 8.3 113 9.91 0.713
Fluorine 7/3.00 49.5 47.2 9.0 135 11.8 0.599
Helium 7/3.75 77.3 73.7 11.3 211 17.6 0.383
Hydrogen 7/4.50 111 106 13.5 304 24.3 0.266
Iodine 7/4.75 124 118 14.3 339 27.1 0.239
Krypton 19/3.25 158 150 16.3 433 37.4 0.189
Lutetium 19/3.50 183 173 17.5 503 41.7 0.163
Neon 19/3.75 210 199 18.8 576 47.8 0.142
Nitrogen 37/3.00 262 248 21.0 721 62.2 0.114
Nobelium 37/3.25 307 291 22.8 845 72.8 0.0973
Oxygen 19/4.75 337 320 23.8 924 73.6 0.0884
Phosphorus 37/3.75 409 387 26.3 1,120 93.1 0.0731
Selenium 61/3.25 506 478 29.3 1,400 114 0.0592
Silicon 61/3.50 587 555 31.5 1,620 127 0.0511
Sulphur 61/3.75 674 636 33.8 1,860 145 0.0444

Table 7 – AS 1531 (AAAC / 6201)

Code name Construction (No./mm) Sectional area (mm²) Calculated equivalent aluminium area (mm²) Approx. overall diameter (mm) Approx. weight (kg/km) Calculated breaking load (kN) Calculated DC resistance at 20°C (Ω/km)
Diamond 7/2.50 34.4 29.3 7.5 94.3 9.64 0.967
Dolomite 7/2.75 41.6 35.4 8.3 113 11.6 0.799
Emerald 7/3.00 49.5 42.2 9.0 135 13.9 0.671
Garnet 7/3.75 77.3 65.8 11.3 211 21.7 0.430
Jade 7/4.50 111 94.8 13.5 304 31.2 0.298
Jasper 7/4.75 124 106 14.3 339 34.8 0.268
Opal 19/3.25 158 134 16.3 433 44.2 0.212
Patronite 19/3.50 183 155 17.5 503 51.3 0.183
Pearl 19/3.75 210 178 18.8 576 58.8 0.159
Ruby 37/3.00 262 221 21.0 721 73.5 0.128
Ruthenium 37/3.25 307 260 22.8 845 86.1 0.109
Rutile 19/4.75 337 285 23.8 924 94.4 0.0991
Sapphire 37/3.75 409 345 26.3 1,120 115 0.0819
Spinel 61/3.25 506 427 29.3 1,400 135 0.0662
Tantalum 61/3.50 587 495 31.5 1,620 156 0.0572
Topaz 61/3.75 674 568 33.8 1,860 179 0.0498

* Current ratings are for guidance; actual values depend on installation conditions.