Conductor Stranding to BS6360/IEC60228

Cross section
mm²
Stranding
Class 1
Stranding
Class 2
Resistance Ω/km
Classes 1 & 2
Stranding
Class 5
Stranding
Class 6
Resistance Ω/km
Classes 5 & 6
Approx
weight kg/km
0.14
-
-
-
-
18 x 0.10
138
1.35
0.25
-
-
-
14 x 0.16
32 x 0.10
79
2.4
0.34
-
-
-
19 x 0.16
42 x 0.10
57
3.3
0.5
1 x 0.80
7 x 0.30
36.0
16 x 0.21
28 x 0.16
39
4.8
0.75
1 x 0.97
7 x 0.37
24.5
24 x 0.21
42 x 0.16
26
7.2
1.0
1 x 1.13
7 x 0.43
18.1
32 x 0.21
56 x 0.16
19.5
9.6
1.5
1 x 1.38
7 x 0.53
12.1
30 x 0.26
84 x 0.16
13.3
14.4
2.5
1 x 1.78
7 x 0.67
7.41
50 x 0.26
140 x 0.16
7.98
24
4.0
1 x 2.26
7 x 0.85
4.61
56 x 0.31
224 x 0.16
4.95
38
6.0
1 x 2.76
7 x 1.04
3.08
84 x 0.31
192 x 0.21
3.3
58
10
1 x 3.57
7 x 1.35
1.83
80 x 0.41
320 x 0.21
1.91
96
16
1 x 4.51
7 x 1.70
1.15
128 x 0.41
512 x 0.21
1.21
154
25
-
7 x 2.14
0.72
200 x 0.41
800 x 0.21
0.78
240
35
-
7 x 2.52
0.524
280 x 0.41
1120 x 0.21
0.554
336
50
-
19 x 1.78
0.387
400 x 0.41
705 x 0.31
0.386
480
70
-
19 x 2.14
0.268
356 x 0.51
990 x 0.31
0.272
672
95
-
19 x 2.52
0.193
485 x 0.51
1340 x 0.31
0.206
912
120
-
37 x 2.03
0.153
614 x 0.51
1690 x 0.31
0.161
1152
150
-
37 x 2.25
0.124
765 x 0.51
2123 x 0.31
0.129
1440
185
-
37 x 2.52
0.099
944 x 0.51
1470 x 0.41
0.106
1776
240
-
61 x 2.25
0.074
1225 x 0.51
1905 x 0.41
0.081
2304
300
-
61 x 2.52
0.06
-
-
-
-
400
-
61 x 2.85
0.046
-
-
-
-
500
-
61 x 3.20
0.036
-
-
-
-

The number of strands according to BS6360/IEC60228 shown in classes 1 & 2 is obligatory. Stranding shown in classes 5 & 6 gives the maximum strand diameters and may have less strands provided the conductor does not exceed the resistance figures shown. In either case the standard gives the maximum resistance in ohms/km that is permissable for untinned conductors.