425 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 4.2V (0.61%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.2V (0.75%)
Voltage at Load685.8 VLine Loss: 3092.3 W
Max Power & Breaker507.92 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 80m
| 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 | 840.16 V (121.76%) | 0.0 V | 1385.87 V (200.85%) | 618460.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 504.1 V (73.06%) | 185.9 V | 831.52 V (120.51%) | 371076.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 315.06 V (45.66%) | 374.9 V | 519.7 V (75.32%) | 231922.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 210.04 V (30.44%) | 480.0 V | 346.47 V (50.21%) | 154615.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 126.02 V (18.26%) | 564.0 V | 207.88 V (30.13%) | 92769.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 78.77 V (11.42%) | 611.2 V | 129.93 V (18.83%) | 57980.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 50.41 V (7.31%) | 639.6 V | 83.15 V (12.05%) | 37107.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 36.01 V (5.22%) | 654.0 V | 59.39 V (8.61%) | 26505.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 25.2 V (3.65%) | 664.8 V | 41.58 V (6.03%) | 18553.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 18.0 V (2.61%) | 672.0 V | 29.7 V (4.3%) | 13252.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 13.27 V (1.92%) | 676.7 V | 21.88 V (3.17%) | 9765.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 10.5 V (1.52%) | 679.5 V | 17.32 V (2.51%) | 7730.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 8.4 V (1.22%) | 681.6 V | 13.86 V (2.01%) | 6184.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.81 V (0.99%) | 683.2 V | 11.24 V (1.63%) | 5014.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.25 V (0.76%) | 684.7 V | 8.66 V (1.26%) | 3865.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.2 V (0.61%) | 685.8 V | 6.93 V (1.0%) | 3092.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.15 V (0.46%) | 686.8 V | 5.2 V (0.75%) | 2319.2 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 425A at 80 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 80m at 690V (voltage drop: 4.2V or 0.61%).
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 · 80m (690V)16A · 80m (690V)20A · 80m (690V)25A · 80m (690V)32A · 80m (690V)40A · 80m (690V)50A · 80m (690V)63A · 80m (690V)80A · 80m (690V)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)