425 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 2.63V (0.38%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.25V (0.47%)
Voltage at Load687.4 VLine Loss: 1932.7 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 50m
| 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 | 525.1 V (76.1%) | 164.9 V | 866.17 V (125.53%) | 386537.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 315.06 V (45.66%) | 374.9 V | 519.7 V (75.32%) | 231922.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 196.91 V (28.54%) | 493.1 V | 324.81 V (47.07%) | 144951.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 131.28 V (19.03%) | 558.7 V | 216.54 V (31.38%) | 96634.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 78.77 V (11.42%) | 611.2 V | 129.93 V (18.83%) | 57980.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 49.23 V (7.13%) | 640.8 V | 81.2 V (11.77%) | 36237.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 31.51 V (4.57%) | 658.5 V | 51.97 V (7.53%) | 23192.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 22.5 V (3.26%) | 667.5 V | 37.12 V (5.38%) | 16565.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 15.75 V (2.28%) | 674.2 V | 25.99 V (3.77%) | 11596.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 11.25 V (1.63%) | 678.7 V | 18.56 V (2.69%) | 8282.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 8.29 V (1.2%) | 681.7 V | 13.68 V (1.98%) | 6103.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.56 V (0.95%) | 683.4 V | 10.83 V (1.57%) | 4831.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.25 V (0.76%) | 684.7 V | 8.66 V (1.26%) | 3865.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.26 V (0.62%) | 685.7 V | 7.02 V (1.02%) | 3134.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.28 V (0.48%) | 686.7 V | 5.41 V (0.78%) | 2415.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.63 V (0.38%) | 687.4 V | 4.33 V (0.63%) | 1932.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.97 V (0.29%) | 688.0 V | 3.25 V (0.47%) | 1449.5 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 50 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 50 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 50m at 690V (voltage drop: 2.63V or 0.38%).
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 · 60m (690V)425A · 70m (690V)10A · 50m (690V)16A · 50m (690V)20A · 50m (690V)25A · 50m (690V)32A · 50m (690V)40A · 50m (690V)50A · 50m (690V)63A · 50m (690V)80A · 50m (690V)100A · 50m (690V)125A · 50m (690V)160A · 50m (690V)200A · 50m (690V)