Nominal Cross Section. Area, mm2 16 35 70
No. and diameter of wire, mm 7/1.70 7/2.5 7/3.55
Overall Diameter, mm 5.1 7.5 10.65
Conductor weight , kg / km 142.4 303.0 621.0
max 144.0 314.9 634.7
Single wire weight, kg/km 20.6 44.52 89.74
Conductor Minimum Breaking Load after Stranding, N 5,946 14,097 26,880
Conductor DC resistance at 20 °C Ohm/km, min 1.128 0.5123 0.2585
max 1.154 0.5319 0.2637
Modulus of Elasticity, kN/mm2 124 124 124
Temperature co-efficient of linear expansion of hard-drawn copper (per °C) 16 x10 -6 16 x10 -6 16 x10 -6
Temperature co-efficient of resistance of hard-drawn aluminium (per °C) 0.00393 0.00393 0.00393