425 Amp Cable Size at 90 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 425 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 4.73V (1.14%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.85V (1.41%)
Voltage at Load410.3 VLine Loss: 3478.8 W
Max Power & Breaker305.49 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 90m
| 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 | 945.18 V (227.75%) | 0.0 V | 1559.11 V (375.69%) | 695767.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 567.11 V (136.65%) | 0.0 V | 935.46 V (225.41%) | 417460.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 354.44 V (85.41%) | 60.6 V | 584.66 V (140.88%) | 260912.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 236.3 V (56.94%) | 178.7 V | 389.78 V (93.92%) | 173941.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 141.78 V (34.16%) | 273.2 V | 233.87 V (56.35%) | 104365.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 88.61 V (21.35%) | 326.4 V | 146.17 V (35.22%) | 65228.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 56.71 V (13.67%) | 358.3 V | 93.55 V (22.54%) | 41746.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 40.51 V (9.76%) | 374.5 V | 66.82 V (16.1%) | 29818.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.36 V (6.83%) | 386.6 V | 46.77 V (11.27%) | 20873.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.25 V (4.88%) | 394.7 V | 33.41 V (8.05%) | 14909.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 14.92 V (3.6%) | 400.1 V | 24.62 V (5.93%) | 10985.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.81 V (2.85%) | 403.2 V | 19.49 V (4.7%) | 8697.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.45 V (2.28%) | 405.5 V | 15.59 V (3.76%) | 6957.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.66 V (1.85%) | 407.3 V | 12.64 V (3.05%) | 5641.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.91 V (1.42%) | 409.1 V | 9.74 V (2.35%) | 4348.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.73 V (1.14%) | 410.3 V | 7.8 V (1.88%) | 3478.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.54 V (0.85%) | 411.5 V | 5.85 V (1.41%) | 2609.1 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 90 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 425A at 90 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 425A over 90m at 415V (voltage drop: 4.73V or 1.14%).
What is the power capacity of 425A at 415V?
At unity power factor, 425A at 415V supports 305.49 kW with a standard 450A circuit breaker.
Related Lengths & Currents (415V)
425A · 5m (415V)425A · 10m (415V)425A · 15m (415V)425A · 20m (415V)425A · 25m (415V)425A · 30m (415V)425A · 35m (415V)425A · 40m (415V)425A · 45m (415V)425A · 50m (415V)425A · 60m (415V)425A · 70m (415V)10A · 90m (415V)16A · 90m (415V)20A · 90m (415V)25A · 90m (415V)32A · 90m (415V)40A · 90m (415V)50A · 90m (415V)63A · 90m (415V)80A · 90m (415V)100A · 90m (415V)125A · 90m (415V)160A · 90m (415V)200A · 90m (415V)