425 Amp Cable Size at 5 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 5 m (16.4 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.26V (0.04%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.32V (0.05%)
Voltage at Load689.7 VLine Loss: 193.3 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 5m
| 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 | 52.51 V (7.61%) | 637.5 V | 86.62 V (12.55%) | 38653.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 31.51 V (4.57%) | 658.5 V | 51.97 V (7.53%) | 23192.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 19.69 V (2.85%) | 670.3 V | 32.48 V (4.71%) | 14495.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 13.13 V (1.9%) | 676.9 V | 21.65 V (3.14%) | 9663.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 7.88 V (1.14%) | 682.1 V | 12.99 V (1.88%) | 5798.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 4.92 V (0.71%) | 685.1 V | 8.12 V (1.18%) | 3623.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.15 V (0.46%) | 686.8 V | 5.2 V (0.75%) | 2319.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 2.25 V (0.33%) | 687.7 V | 3.71 V (0.54%) | 1656.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.58 V (0.23%) | 688.4 V | 2.6 V (0.38%) | 1159.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.13 V (0.16%) | 688.9 V | 1.86 V (0.27%) | 828.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.83 V (0.12%) | 689.2 V | 1.37 V (0.2%) | 610.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.66 V (0.1%) | 689.3 V | 1.08 V (0.16%) | 483.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 0.53 V (0.08%) | 689.5 V | 0.87 V (0.13%) | 386.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 0.43 V (0.06%) | 689.6 V | 0.7 V (0.1%) | 313.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 0.33 V (0.05%) | 689.7 V | 0.54 V (0.08%) | 241.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 0.26 V (0.04%) | 689.7 V | 0.43 V (0.06%) | 193.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.2 V (0.03%) | 689.8 V | 0.32 V (0.05%) | 145.0 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 5 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 5 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 5m at 690V (voltage drop: 0.26V or 0.04%).
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 · 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 · 5m (690V)16A · 5m (690V)20A · 5m (690V)25A · 5m (690V)32A · 5m (690V)40A · 5m (690V)50A · 5m (690V)63A · 5m (690V)80A · 5m (690V)100A · 5m (690V)125A · 5m (690V)160A · 5m (690V)200A · 5m (690V)