80 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 80 A over 15 m (49.2 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 1.78V (0.26%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 2.1V (0.3%)
Voltage at Load688.2 VLine Loss: 246.5 W
Max Power & Breaker95.61 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A 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 | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 4108.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 17.79 V (2.58%) | 672.2 V | 29.35 V (4.25%) | 2465.3 W | Drop High |
| 4 mm² | 32 A | 25 A | 11.12 V (1.61%) | 678.9 V | 18.34 V (2.66%) | 1540.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 7.41 V (1.07%) | 682.6 V | 12.23 V (1.77%) | 1027.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 4.45 V (0.64%) | 685.6 V | 7.34 V (1.06%) | 616.3 W | Drop High |
| 16 mm² | 76 A | 59 A | 2.78 V (0.4%) | 687.2 V | 4.59 V (0.66%) | 385.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 1.78 V (0.26%) | 688.2 V | 2.93 V (0.43%) | 246.5 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.27 V (0.18%) | 688.7 V | 2.1 V (0.3%) | 176.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.89 V (0.13%) | 689.1 V | 1.47 V (0.21%) | 123.3 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.64 V (0.09%) | 689.4 V | 1.05 V (0.15%) | 88.0 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.47 V (0.07%) | 689.5 V | 0.77 V (0.11%) | 64.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.37 V (0.05%) | 689.6 V | 0.61 V (0.09%) | 51.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.3 V (0.04%) | 689.7 V | 0.49 V (0.07%) | 41.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.24 V (0.03%) | 689.8 V | 0.4 V (0.06%) | 33.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.19 V (0.03%) | 689.8 V | 0.31 V (0.04%) | 25.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.15 V (0.02%) | 689.9 V | 0.24 V (0.04%) | 20.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.11 V (0.02%) | 689.9 V | 0.18 V (0.03%) | 15.4 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 15 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 80A at 15 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 15m at 690V (voltage drop: 1.78V or 0.26%).
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 · 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 · 15m (690V)16A · 15m (690V)20A · 15m (690V)25A · 15m (690V)32A · 15m (690V)40A · 15m (690V)50A · 15m (690V)63A · 15m (690V)100A · 15m (690V)125A · 15m (690V)160A · 15m (690V)200A · 15m (690V)