80 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 80 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 9.49V (1.38%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 11.18V (1.62%)
Voltage at Load680.5 VLine Loss: 1314.8 W
Max Power & Breaker95.61 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A 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 | 158.15 V (22.92%) | 531.9 V | 260.87 V (37.81%) | 21913.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 94.89 V (13.75%) | 595.1 V | 156.52 V (22.68%) | 13148.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 59.31 V (8.59%) | 630.7 V | 97.83 V (14.18%) | 8217.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 39.54 V (5.73%) | 650.5 V | 65.22 V (9.45%) | 5478.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 23.72 V (3.44%) | 666.3 V | 39.13 V (5.67%) | 3287.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 14.83 V (2.15%) | 675.2 V | 24.46 V (3.54%) | 2054.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 9.49 V (1.38%) | 680.5 V | 15.65 V (2.27%) | 1314.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 6.78 V (0.98%) | 683.2 V | 11.18 V (1.62%) | 939.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 4.74 V (0.69%) | 685.3 V | 7.83 V (1.13%) | 657.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 3.39 V (0.49%) | 686.6 V | 5.59 V (0.81%) | 469.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 2.5 V (0.36%) | 687.5 V | 4.12 V (0.6%) | 346.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.98 V (0.29%) | 688.0 V | 3.26 V (0.47%) | 273.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.58 V (0.23%) | 688.4 V | 2.61 V (0.38%) | 219.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.28 V (0.19%) | 688.7 V | 2.12 V (0.31%) | 177.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.99 V (0.14%) | 689.0 V | 1.63 V (0.24%) | 137.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.79 V (0.11%) | 689.2 V | 1.3 V (0.19%) | 109.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.59 V (0.09%) | 689.4 V | 0.98 V (0.14%) | 82.2 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 80A at 80 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 80A over 80m at 690V (voltage drop: 9.49V or 1.38%).
What is the power capacity of 80A at 690V?
At unity power factor, 80A at 690V supports 95.61 kW with a standard 80A circuit breaker.
Related Lengths & Currents (690V)
80A · 5m (690V)80A · 10m (690V)80A · 15m (690V)80A · 20m (690V)80A · 25m (690V)80A · 30m (690V)80A · 35m (690V)80A · 40m (690V)80A · 45m (690V)80A · 50m (690V)80A · 60m (690V)80A · 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)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)