As the cable cross section(C.S) increases, the
density of current (A/mm2) decreases due to skin effect.
|
Maximum AMPACITY |
Current Density A/mm2 |
|
| 1 mm2 | 13 A | 13 |
| 3* 150 mm2 |
350 A |
2.3 |
| 3 * 300 mm2 | 570 A | 1.9 |
| 3 * 400 mm2 | 680 A | 1.7 |
|
3 * 630 mm2
|
880 A |
1.4
|
the current passes in the outer layers and decreases gradually to be zero in the
inner layers