900 Amp Cable Size at 250 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 900 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 10.43V (2.51%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 34.39V (8.29%)
Voltage at Load404.6 VLine Loss: 16250.6 W
Max Power & Breaker646.92 kW1000A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 900A at 250m
| 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 | 5559.88 V (1339.73%) | 0.0 V | 9171.21 V (2209.93%) | 8667000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 3335.93 V (803.84%) | 0.0 V | 5502.73 V (1325.96%) | 5200200.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2084.96 V (502.4%) | 0.0 V | 3439.2 V (828.72%) | 3250125.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1389.97 V (334.93%) | 0.0 V | 2292.8 V (552.48%) | 2166750.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 833.98 V (200.96%) | 0.0 V | 1375.68 V (331.49%) | 1300050.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 521.24 V (125.6%) | 0.0 V | 859.8 V (207.18%) | 812531.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 333.59 V (80.38%) | 81.4 V | 550.27 V (132.6%) | 520020.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 238.28 V (57.42%) | 176.7 V | 393.05 V (94.71%) | 371442.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 166.8 V (40.19%) | 248.2 V | 275.14 V (66.3%) | 260010.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 119.14 V (28.71%) | 295.9 V | 196.53 V (47.36%) | 185721.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 87.79 V (21.15%) | 327.2 V | 144.81 V (34.89%) | 136847.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 69.5 V (16.75%) | 345.5 V | 114.64 V (27.62%) | 108337.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 55.6 V (13.4%) | 359.4 V | 91.71 V (22.1%) | 86670.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 45.08 V (10.86%) | 369.9 V | 74.36 V (17.92%) | 70273.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 34.75 V (8.37%) | 380.3 V | 57.32 V (13.81%) | 54168.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 27.8 V (6.7%) | 387.2 V | 45.86 V (11.05%) | 43335.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 20.85 V (5.02%) | 394.2 V | 34.39 V (8.29%) | 32501.2 W | Drop High |
FAQ — 900 Amp Cable Size at 250 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 900A at 250 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 900A over 250m at 415V (voltage drop: 10.43V or 2.51%).
What is the power capacity of 900A at 415V?
At unity power factor, 900A at 415V supports 646.92 kW with a standard 1000A circuit breaker.
Related Lengths & Currents (415V)
900A · 5m (415V)900A · 10m (415V)900A · 15m (415V)900A · 20m (415V)900A · 25m (415V)900A · 30m (415V)900A · 35m (415V)900A · 40m (415V)900A · 45m (415V)900A · 50m (415V)900A · 60m (415V)900A · 70m (415V)10A · 250m (415V)16A · 250m (415V)20A · 250m (415V)25A · 250m (415V)32A · 250m (415V)40A · 250m (415V)50A · 250m (415V)63A · 250m (415V)80A · 250m (415V)100A · 250m (415V)125A · 250m (415V)160A · 250m (415V)200A · 250m (415V)