80 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 80 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 8.3V (2.0%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 9.78V (2.36%)
Voltage at Load406.7 VLine Loss: 1150.5 W
Max Power & Breaker57.5 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A at 70m
| 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 | 138.38 V (33.34%) | 276.6 V | 228.26 V (55.0%) | 19174.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 83.03 V (20.01%) | 332.0 V | 136.96 V (33.0%) | 11504.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 51.89 V (12.5%) | 363.1 V | 85.6 V (20.63%) | 7190.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 34.59 V (8.34%) | 380.4 V | 57.07 V (13.75%) | 4793.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 20.76 V (5.0%) | 394.2 V | 34.24 V (8.25%) | 2876.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 1797.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 8.3 V (2.0%) | 406.7 V | 13.7 V (3.3%) | 1150.5 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 5.93 V (1.43%) | 409.1 V | 9.78 V (2.36%) | 821.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 4.15 V (1.0%) | 410.8 V | 6.85 V (1.65%) | 575.2 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.97 V (0.71%) | 412.0 V | 4.89 V (1.18%) | 410.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 2.18 V (0.53%) | 412.8 V | 3.6 V (0.87%) | 302.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.73 V (0.42%) | 413.3 V | 2.85 V (0.69%) | 239.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.38 V (0.33%) | 413.6 V | 2.28 V (0.55%) | 191.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.12 V (0.27%) | 413.9 V | 1.85 V (0.45%) | 155.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.86 V (0.21%) | 414.1 V | 1.43 V (0.34%) | 119.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.69 V (0.17%) | 414.3 V | 1.14 V (0.28%) | 95.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.52 V (0.13%) | 414.5 V | 0.86 V (0.21%) | 71.9 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 80A at 70 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 80A over 70m at 415V (voltage drop: 8.3V or 2.0%).
What is the power capacity of 80A at 415V?
At unity power factor, 80A at 415V supports 57.5 kW with a standard 80A circuit breaker.
Related Lengths & Currents (415V)
80A · 5m (415V)80A · 10m (415V)80A · 15m (415V)80A · 20m (415V)80A · 25m (415V)80A · 30m (415V)80A · 35m (415V)80A · 40m (415V)80A · 45m (415V)80A · 50m (415V)80A · 60m (415V)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)