425 Amp Cable Size at 25 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 425 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.31V (0.33%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.62V (0.41%)
Voltage at Load398.7 VLine Loss: 966.3 W
Max Power & Breaker294.45 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 25m
| 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 | 262.55 V (65.64%) | 137.4 V | 433.08 V (108.27%) | 193268.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 157.53 V (39.38%) | 242.5 V | 259.85 V (64.96%) | 115961.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 98.46 V (24.61%) | 301.5 V | 162.41 V (40.6%) | 72475.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 65.64 V (16.41%) | 334.4 V | 108.27 V (27.07%) | 48317.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 39.38 V (9.85%) | 360.6 V | 64.96 V (16.24%) | 28990.3 W | Drop High |
| 16 mm² | 76 A | 59 A | 24.61 V (6.15%) | 375.4 V | 40.6 V (10.15%) | 18118.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 15.75 V (3.94%) | 384.2 V | 25.99 V (6.5%) | 11596.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 11.25 V (2.81%) | 388.7 V | 18.56 V (4.64%) | 8282.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 7.88 V (1.97%) | 392.1 V | 12.99 V (3.25%) | 5798.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 5.63 V (1.41%) | 394.4 V | 9.28 V (2.32%) | 4141.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.15 V (1.04%) | 395.9 V | 6.84 V (1.71%) | 3051.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.28 V (0.82%) | 396.7 V | 5.41 V (1.35%) | 2415.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.63 V (0.66%) | 397.4 V | 4.33 V (1.08%) | 1932.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.13 V (0.53%) | 397.9 V | 3.51 V (0.88%) | 1567.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.64 V (0.41%) | 398.4 V | 2.71 V (0.68%) | 1207.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.31 V (0.33%) | 398.7 V | 2.17 V (0.54%) | 966.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.98 V (0.25%) | 399.0 V | 1.62 V (0.41%) | 724.8 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 25 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 425A at 25 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 425A over 25m at 400V (voltage drop: 1.31V or 0.33%).
What is the power capacity of 425A at 400V?
At unity power factor, 425A at 400V supports 294.45 kW with a standard 450A circuit breaker.
Related Lengths & Currents (400V)
425A · 5m (400V)425A · 10m (400V)425A · 15m (400V)425A · 20m (400V)425A · 30m (400V)425A · 35m (400V)425A · 40m (400V)425A · 45m (400V)425A · 50m (400V)425A · 60m (400V)425A · 70m (400V)10A · 25m (400V)16A · 25m (400V)20A · 25m (400V)25A · 25m (400V)32A · 25m (400V)40A · 25m (400V)50A · 25m (400V)63A · 25m (400V)80A · 25m (400V)100A · 25m (400V)125A · 25m (400V)160A · 25m (400V)200A · 25m (400V)