Cross-sectional area | Minimum insulation thickness | Minimum covering thickness | Outside diameter | Ac test voltage | 20℃Maximum conductor DC resistance | 20℃Minimum insulation resistance | Approximate weight |
mm2 | mm | mm | mm | KV/5minutes | M Ω-km | kg/km | m |
Neutral ground system | |||||||
30 | 6.6 | 2.03 | 28.0 | 52 | 0.623 | 3600 | 970 |
38 | 6.6 | 2.03 | 28.0 | 52 | 0.487 | 3600 | 1060 |
50 | 6.6 | 2.03 | 29.0 | 52 | 0.378 | 3000 | 1200 |
60 | 6.6 | 2.03 | 30.0 | 52 | 0.303 | 3000 | 1340 |
80 | 6.6 | 2.03 | 32.0 | 52 | 0.229 | 3000 | 1600 |
100 | 6.6 | 2.03 | 34.0 | 52 | 0.180 | 2800 | 1850 |
125 | 6.6 | 2.03 | 35.0 | 52 | 0.144 | 2000 | 2140 |
150 | 6.6 | 2.03 | 37.0 | 52 | 0.118 | 2000 | 2480 |
200 | 6.6 | 2.03 | 39.0 | 52 | 0.0922 | 2000 | 2940 |
250 | 6.6 | 2.03 | 41.0 | 52 | 0.0722 | 1800 | 3560 |
325 | 6.6 | 2.79 | 45.0 | 52 | 0.0565 | 1500 | 4500 |
400 | 6.6 | 2.79 | 49.0 | 52 | 0.0454 | 1500 | 5390 |
500 | 6.6 | 2.79 | 51.0 | 52 | 0.0373 | 1500 | 6300 |
Neutral ungrounded system | |||||||
30 | 8.76 | 2.03 | 32.0 | 64 | 0.623 | 4500 | 1190 |
38 | 8.76 | 2.03 | 33.0 | 64 | 0.487 | 4500 | 1300 |
50 | 8.76 | 2.03 | 34.0 | 64 | 0.378 | 4000 | 1500 |
60 | 8.76 | 2.03 | 35.0 | 64 | 0.303 | 3800 | 1590 |
80 | 8.76 | 2.03 | 37.0 | 64 | 0.229 | 3500 | 1900 |
100 | 8.76 | 2.03 | 38.0 | 64 | 0.180 | 3500 | 2100 |
125 | 8.76 | 2.03 | 40.0 | 64 | 0.144 | 3500 | 2500 |
150 | 8.76 | 2.03 | 41.0 | 64 | 0.118 | 3200 | 2740 |
200 | 8.76 | 2.79 | 45.0 | 64 | 0.0922 | 2800 | 3370 |
250 | 8.76 | 2.79 | 47.0 | 64 | 0.0722 | 2800 | 4060 |
325 | 8.76 | 2.79 | 50.0 | 64 | 0.0565 | 2400 | 4880 |
400 | 8.76 | 2.79 | 53.0 | 64 | 0.0454 | 2000 | 5740 |
500 | 8.76 | 2.79 | 56.0 | 64 | 0.0373 | 2000 | 6670 |