425 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy 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 (0.68%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.85V (0.85%)
Voltage at Load685.3 VLine Loss: 3478.8 W
Max Power & Breaker507.92 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 (136.98%) | 0.0 V | 1559.11 V (225.96%) | 695767.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 567.11 V (82.19%) | 122.9 V | 935.46 V (135.57%) | 417460.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 354.44 V (51.37%) | 335.6 V | 584.66 V (84.73%) | 260912.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 236.3 V (34.25%) | 453.7 V | 389.78 V (56.49%) | 173941.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 141.78 V (20.55%) | 548.2 V | 233.87 V (33.89%) | 104365.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 88.61 V (12.84%) | 601.4 V | 146.17 V (21.18%) | 65228.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 56.71 V (8.22%) | 633.3 V | 93.55 V (13.56%) | 41746.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 40.51 V (5.87%) | 649.5 V | 66.82 V (9.68%) | 29818.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.36 V (4.11%) | 661.6 V | 46.77 V (6.78%) | 20873.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.25 V (2.94%) | 669.7 V | 33.41 V (4.84%) | 14909.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 14.92 V (2.16%) | 675.1 V | 24.62 V (3.57%) | 10985.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.81 V (1.71%) | 678.2 V | 19.49 V (2.82%) | 8697.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.45 V (1.37%) | 680.5 V | 15.59 V (2.26%) | 6957.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.66 V (1.11%) | 682.3 V | 12.64 V (1.83%) | 5641.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.91 V (0.86%) | 684.1 V | 9.74 V (1.41%) | 4348.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.73 V (0.68%) | 685.3 V | 7.8 V (1.13%) | 3478.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.54 V (0.51%) | 686.5 V | 5.85 V (0.85%) | 2609.1 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 90 meters (690V)?
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 690V (voltage drop: 4.73V or 0.68%).
What is the power capacity of 425A at 690V?
At unity power factor, 425A at 690V supports 507.92 kW with a standard 450A circuit breaker.
Related Lengths & Currents (690V)
425A · 5m (690V)425A · 10m (690V)425A · 15m (690V)425A · 20m (690V)425A · 25m (690V)425A · 30m (690V)425A · 35m (690V)425A · 40m (690V)425A · 45m (690V)425A · 50m (690V)425A · 60m (690V)425A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)