425 Amp Cable Size at 35 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 35 m (114.8 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.84V (0.27%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.27V (0.33%)
Voltage at Load688.2 VLine Loss: 1352.9 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 35m
| 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 | 367.57 V (53.27%) | 322.4 V | 606.32 V (87.87%) | 270576.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 220.54 V (31.96%) | 469.5 V | 363.79 V (52.72%) | 162345.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 137.84 V (19.98%) | 552.2 V | 227.37 V (32.95%) | 101466.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 91.89 V (13.32%) | 598.1 V | 151.58 V (21.97%) | 67644.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 55.14 V (7.99%) | 634.9 V | 90.95 V (13.18%) | 40586.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 34.46 V (4.99%) | 655.5 V | 56.84 V (8.24%) | 25366.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 22.05 V (3.2%) | 667.9 V | 36.38 V (5.27%) | 16234.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 15.75 V (2.28%) | 674.2 V | 25.99 V (3.77%) | 11596.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 11.03 V (1.6%) | 679.0 V | 18.19 V (2.64%) | 8117.3 W | Drop High |
| 70 mm² | 192 A | 150 A | 7.88 V (1.14%) | 682.1 V | 12.99 V (1.88%) | 5798.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 5.8 V (0.84%) | 684.2 V | 9.57 V (1.39%) | 4272.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.59 V (0.67%) | 685.4 V | 7.58 V (1.1%) | 3382.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.68 V (0.53%) | 686.3 V | 6.06 V (0.88%) | 2705.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.98 V (0.43%) | 687.0 V | 4.92 V (0.71%) | 2193.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.3 V (0.33%) | 687.7 V | 3.79 V (0.55%) | 1691.1 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.84 V (0.27%) | 688.2 V | 3.03 V (0.44%) | 1352.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.38 V (0.2%) | 688.6 V | 2.27 V (0.33%) | 1014.7 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 35 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 35m at 690V (voltage drop: 1.84V or 0.27%).
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 · 40m (690V)425A · 45m (690V)425A · 50m (690V)425A · 60m (690V)425A · 70m (690V)10A · 35m (690V)16A · 35m (690V)20A · 35m (690V)25A · 35m (690V)32A · 35m (690V)40A · 35m (690V)50A · 35m (690V)63A · 35m (690V)80A · 35m (690V)100A · 35m (690V)125A · 35m (690V)160A · 35m (690V)200A · 35m (690V)