400 Amp Cable Size at 400 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 400 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 7.42V (1.78%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 24.46V (5.89%)
Voltage at Load407.6 VLine Loss: 5136.0 W
Max Power & Breaker287.52 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 400m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 3953.69 V (952.7%) | 0.0 V | 6521.75 V (1571.51%) | 2739200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2372.22 V (571.62%) | 0.0 V | 3913.05 V (942.9%) | 1643520.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1482.64 V (357.26%) | 0.0 V | 2445.66 V (589.31%) | 1027200.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 988.42 V (238.17%) | 0.0 V | 1630.44 V (392.88%) | 684800.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 593.05 V (142.9%) | 0.0 V | 978.26 V (235.73%) | 410880.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 370.66 V (89.32%) | 44.3 V | 611.41 V (147.33%) | 256800.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 237.22 V (57.16%) | 177.8 V | 391.3 V (94.29%) | 164352.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 169.44 V (40.83%) | 245.6 V | 279.5 V (67.35%) | 117394.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 118.61 V (28.58%) | 296.4 V | 195.65 V (47.15%) | 82176.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 84.72 V (20.41%) | 330.3 V | 139.75 V (33.68%) | 58697.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 62.43 V (15.04%) | 352.6 V | 102.97 V (24.81%) | 43250.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 49.42 V (11.91%) | 365.6 V | 81.52 V (19.64%) | 34240.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 39.54 V (9.53%) | 375.5 V | 65.22 V (15.72%) | 27392.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 32.06 V (7.72%) | 382.9 V | 52.88 V (12.74%) | 22209.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 24.71 V (5.95%) | 390.3 V | 40.76 V (9.82%) | 17120.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 19.77 V (4.76%) | 395.2 V | 32.61 V (7.86%) | 13696.0 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 14.83 V (3.57%) | 400.2 V | 24.46 V (5.89%) | 10272.0 W | ~ ≤5% |
FAQ — 400 Amp Cable Size at 400 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 400A at 400 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 400A over 400m at 415V (voltage drop: 7.42V or 1.78%).
What is the power capacity of 400A at 415V?
At unity power factor, 400A at 415V supports 287.52 kW with a standard 400A circuit breaker.
Related Lengths & Currents (415V)
400A · 5m (415V)400A · 10m (415V)400A · 15m (415V)400A · 20m (415V)400A · 25m (415V)400A · 30m (415V)400A · 35m (415V)400A · 40m (415V)400A · 45m (415V)400A · 50m (415V)400A · 60m (415V)400A · 70m (415V)10A · 400m (415V)16A · 400m (415V)20A · 400m (415V)25A · 400m (415V)32A · 400m (415V)40A · 400m (415V)50A · 400m (415V)63A · 400m (415V)80A · 400m (415V)100A · 400m (415V)125A · 400m (415V)160A · 400m (415V)200A · 400m (415V)