Technical Reference

Conductor Resistance

Nominal cross-section area Plain copper conductor wires(Ohm/km) Tinned copper conductor wires(Ohm/km)
mm2 class 1 and 2 Class 5 and 6 class 1 and 2 Class 5 and 6
0.05 – 380 – 392
0.08 – 237 – 244
0.11 – 170 – 175
0.126 – 150 – 155
0.14 – 134 – 138
0.22 – 96 – 99
0.25 – 76 – 79
0.34 – 53 – 56
0.5 36 39 36.7 40.1
0.75 24.5 26 24.8 26.7
1 18.1 19.5 18.2 20
1.5 12.1 13.3 12.2 13.7
2.5 7.41 7.98 7.56 8.21
4 4.61 4.95 4.7 5.09
6 3.08 3.3 3.11 3.39
10 1.83 1.91 1.84 1.95
16 1.15 1.21 1.16 1.24
25 0.727* 0.78 0.734 0.795
35 0.524* 0.554 0.529 0.565
50 0.387* 0.386 0.391 0.393
70 0.268* 0.272 0.27 0.277
95 0.193* 0.206 0.195 0.21
120 0.153* 0.161 0.154 0.164
150 0.124* 0.129 0.126 0.132
185 0.0991 0.106 0.1 0.108
240 0.0754 0.0801 0.0762 0.0817
300 0.0601 0.0641 0.0607 0.0654
400 0.047 0.0486 0.0475 0.0495
500 0.0366 0.0384 0.0369 0.0391
630 0.0283 0.0287 0.0286 0.0292

Electrical Test

Test Unit H07Z-K H07Z-R H07Z-U H05Z-K H05Z-U Thermosetting insulated, single-core cables Thermosetting insulated, twin, 3-core, 4-core and 5-core circular sheathed cables 6241B 6242B 6243B
Voltage test on complete cable
Length of sample (min.) m 20 20 20 20 20
Period of immersion (min.) h 1 1 1 1 1
Temperature of water °C 20 ± 5 20 ± 5 20 ± 5 20 ± 5 20 ± 5
Applied voltage (a.c.) V 2 500 2 000 2 500 2 500 2 000
Time of application min 15 15 15 15 15
Voltage test on cores
Length of sample m — — 20 20 20
Period of immersion (min.) h — — 1 1 1
Temperature of water °C — — 20 ± 5 20 ± 5 20 ± 5
Applied voltage (a.c.) V — — 2 500 2 500 2 000
Time of application min — — 5 5 5
Insulation resistance
Length of sample m 5 5 5 5 5
Period of immersion (min.) h 2 2 2 2 2
Temperature of water °C 90 ± 2 90 ± 2 90 ± 2 90 ± 2 90 ± 2
Spark test
Result to be obtained   No failure No failure No failure — —
Voltage test          
Applied voltage a.c. V — — — 2500 2000
Applied voltage d.c. (min) V — — — 5000 5000
Duration of test min — — — 5 5
Result to be obtained   — — — No breakdown No breakdown