Stranding & Resistance

Stranding and Resistance Chart to BS6360, IEC 60228 & VDE 0295

Class 1 & 2: Shows the obligatory number of strands
Class 5 & 6: Shows the maximum strand diameter, may be fewer strands as long as the maximum ohms/km is not exceeded
Ohms Ω/km: Shows the maximum resistance in that is permissible for untinned copper conductors in the stranding classes indicated

Area (mm²) Stranding Class 1 Stranding Class 2 Ohms Ω/km Stranding Class 5 Stranding Class 6 Stranding Class 6
0.14 N/A N/A N/A 18 x 0.10 18 x 0.10 138.0
0.25 N/A N/A N/A 14 x 0.16 32 x 0.10 79.0
0.34 N/A N/A N/A 19 x 0.16 42 x 0.10 57.0
0.5 1 x 0.80 7 x 0.30 36.0 16 x 0.21 28 x 0.10 39.0
0.75 1 x 0.97 7 x 0.37 24.5 24 x 0.21 42 x 0.16 26.0
1.0 1 x 1.13 7 x 0.43 18.1 32 x 0.21 56 x 0.16 19.5
1.5 1 x 1.38 7 x 0.53 12.1 30 x 0.26 84 x 0.16 13.3
2.5 1 x 1.78 7 x 0.67 7.41 50 x 0.26 140 x 0.16 7.98
4.0 1 x 2.26 7 x 0.85 4.61 56 x 0.31 224 x 0.16 4.95
6.0 1 x 2.76 7 x 1.04 3.08 84 x 0.31 192 x 0.21 3.30
10.0 1 x 3.57 7 x 1.35 1.83 80 x 0.41 320 x 0.21 1.91
16.0 1 x 4.51 7 x 1.70 1.15 128 x 0.41 512 x 0.21 1.21
25.0 N/A 7 x 2.14 0.72 200 x 0.41 800 x 0.21 0.78
35.0 N/A 7 x 2.52 0.524 280 x 0.41 1120 x 0.21 0.554
50.0 N/A 19 x 1.78 0.387 400 x 0.41 705 x 0.31 0.386
70.0 N/A 19 x 2.14 0.268 356 x 0.51 990 x 0.31 0.272
95.0 N/A 19 x 2.52 0.193 485 x 0.51 1340 x 0.31 0.206
120 N/A 37 x 2.03 0.153 614 x 0.51 1690 x 0.31 0.161
150 N/A 37 x 2.25 0.124 765 x 0.51 2123 x 0.31 0.129
185 N/A 37 x 2.52 0.099 944 x 0.51 1470 x 0.41 0.106
240 N/A 61 x 2.25 0.074 1225 x 0.5 1905 x 0.41 0.081