Nominal Cross Section. Area, mm2 25 50 120 150 265 400
No. and diameter of wire, mm 7/2.13 7/3.1 19/2.8 19/3.25 19/4.22 37/3.71
Overall Diameter, mm 6.4 9.3 14 16.25 21.1 26
Conductor weight , kg / km 68.4 145 322 434 731 1102
Conductor Minimum Breaking Load after Stranding, N 4,500 8,720 19,890 26,010 45,520 64,000
Max. Conductor DC resistance at 20 °C Ohm/km 1.1453 0.5409 0.2456 0.1823 0.1081 0.0721
Modulus of Elasticity, kN/mm2 58.85 58.85 57 57 57 55
Temperature co-efficient of linear expansion of hard-drawn copper (per °C) 23 x10 -6 23 x10 -6 23 x10 -6 23 x10 -6 23 x10 -6 23 x10 -6
Temperature co-efficient of resistance of hard-drawn aluminium (per °C) 0.004 0.004 0.004 0.004 0.004 0.004