425 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 2.36V (0.34%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.92V (0.42%)
Voltage at Load687.6 VLine Loss: 1739.4 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 45m
| 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 | 472.59 V (68.49%) | 217.4 V | 779.55 V (112.98%) | 347883.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 283.55 V (41.09%) | 406.4 V | 467.73 V (67.79%) | 208730.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 177.22 V (25.68%) | 512.8 V | 292.33 V (42.37%) | 130456.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 118.15 V (17.12%) | 571.9 V | 194.89 V (28.24%) | 86970.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 70.89 V (10.27%) | 619.1 V | 116.93 V (16.95%) | 52182.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 44.31 V (6.42%) | 645.7 V | 73.08 V (10.59%) | 32614.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 28.36 V (4.11%) | 661.6 V | 46.77 V (6.78%) | 20873.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 20.25 V (2.94%) | 669.7 V | 33.41 V (4.84%) | 14909.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 14.18 V (2.05%) | 675.8 V | 23.39 V (3.39%) | 10436.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.13 V (1.47%) | 679.9 V | 16.7 V (2.42%) | 7454.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.46 V (1.08%) | 682.5 V | 12.31 V (1.78%) | 5492.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.91 V (0.86%) | 684.1 V | 9.74 V (1.41%) | 4348.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.73 V (0.68%) | 685.3 V | 7.8 V (1.13%) | 3478.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.83 V (0.56%) | 686.2 V | 6.32 V (0.92%) | 2820.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.95 V (0.43%) | 687.0 V | 4.87 V (0.71%) | 2174.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.36 V (0.34%) | 687.6 V | 3.9 V (0.56%) | 1739.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.77 V (0.26%) | 688.2 V | 2.92 V (0.42%) | 1304.6 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 45 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 45 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 45m at 690V (voltage drop: 2.36V or 0.34%).
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 · 50m (690V)425A · 60m (690V)425A · 70m (690V)10A · 45m (690V)16A · 45m (690V)20A · 45m (690V)25A · 45m (690V)32A · 45m (690V)40A · 45m (690V)50A · 45m (690V)63A · 45m (690V)80A · 45m (690V)100A · 45m (690V)125A · 45m (690V)160A · 45m (690V)200A · 45m (690V)