425 Amp Cable Size at 15 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 15 m (49.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.79V (0.11%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.97V (0.14%)
Voltage at Load689.2 VLine Loss: 579.8 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 15m
| 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 | 157.53 V (22.83%) | 532.5 V | 259.85 V (37.66%) | 115961.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 94.52 V (13.7%) | 595.5 V | 155.91 V (22.6%) | 69576.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 59.07 V (8.56%) | 630.9 V | 97.44 V (14.12%) | 43485.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 39.38 V (5.71%) | 650.6 V | 64.96 V (9.41%) | 28990.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 23.63 V (3.42%) | 666.4 V | 38.98 V (5.65%) | 17394.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 14.77 V (2.14%) | 675.2 V | 24.36 V (3.53%) | 10871.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 9.45 V (1.37%) | 680.5 V | 15.59 V (2.26%) | 6957.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 6.75 V (0.98%) | 683.2 V | 11.14 V (1.61%) | 4969.8 W | Drop High |
| 50 mm² | 151 A | 118 A | 4.73 V (0.68%) | 685.3 V | 7.8 V (1.13%) | 3478.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 3.38 V (0.49%) | 686.6 V | 5.57 V (0.81%) | 2484.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.49 V (0.36%) | 687.5 V | 4.1 V (0.59%) | 1831.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.97 V (0.29%) | 688.0 V | 3.25 V (0.47%) | 1449.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.58 V (0.23%) | 688.4 V | 2.6 V (0.38%) | 1159.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.28 V (0.19%) | 688.7 V | 2.11 V (0.31%) | 940.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 0.98 V (0.14%) | 689.0 V | 1.62 V (0.24%) | 724.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 0.79 V (0.11%) | 689.2 V | 1.3 V (0.19%) | 579.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.59 V (0.09%) | 689.4 V | 0.97 V (0.14%) | 434.9 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 15 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 15 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 15m at 690V (voltage drop: 0.79V or 0.11%).
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 · 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 · 15m (690V)16A · 15m (690V)20A · 15m (690V)25A · 15m (690V)32A · 15m (690V)40A · 15m (690V)50A · 15m (690V)63A · 15m (690V)80A · 15m (690V)100A · 15m (690V)125A · 15m (690V)160A · 15m (690V)200A · 15m (690V)