425 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 18.38V (2.66%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 22.74V (3.3%)
Voltage at Load671.6 VLine Loss: 13528.8 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 350m
| 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 | 3675.7 V (532.71%) | 0.0 V | 6063.19 V (878.72%) | 2705762.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2205.42 V (319.63%) | 0.0 V | 3637.91 V (527.23%) | 1623457.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 1378.39 V (199.77%) | 0.0 V | 2273.7 V (329.52%) | 1014660.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 918.93 V (133.18%) | 0.0 V | 1515.8 V (219.68%) | 676440.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 551.36 V (79.91%) | 138.6 V | 909.48 V (131.81%) | 405864.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 344.6 V (49.94%) | 345.4 V | 568.42 V (82.38%) | 253665.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 220.54 V (31.96%) | 469.5 V | 363.79 V (52.72%) | 162345.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 157.53 V (22.83%) | 532.5 V | 259.85 V (37.66%) | 115961.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 110.27 V (15.98%) | 579.7 V | 181.9 V (26.36%) | 81172.9 W | Drop High |
| 70 mm² | 192 A | 150 A | 78.77 V (11.42%) | 611.2 V | 129.93 V (18.83%) | 57980.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 58.04 V (8.41%) | 632.0 V | 95.73 V (13.87%) | 42722.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 45.95 V (6.66%) | 644.1 V | 75.79 V (10.98%) | 33822.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 36.76 V (5.33%) | 653.2 V | 60.63 V (8.79%) | 27057.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 29.8 V (4.32%) | 660.2 V | 49.16 V (7.12%) | 21938.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 22.97 V (3.33%) | 667.0 V | 37.89 V (5.49%) | 16911.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 18.38 V (2.66%) | 671.6 V | 30.32 V (4.39%) | 13528.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 13.78 V (2.0%) | 676.2 V | 22.74 V (3.3%) | 10146.6 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 350 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 350 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 350m at 690V (voltage drop: 18.38V or 2.66%).
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 · 350m (690V)16A · 350m (690V)20A · 350m (690V)25A · 350m (690V)32A · 350m (690V)40A · 350m (690V)50A · 350m (690V)63A · 350m (690V)80A · 350m (690V)100A · 350m (690V)125A · 350m (690V)160A · 350m (690V)200A · 350m (690V)