80 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 9.49V (2.29%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 11.18V (2.69%)
Voltage at Load405.5 VLine Loss: 1314.8 W
Max Power & Breaker57.5 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 (38.11%) | 256.9 V | 260.87 V (62.86%) | 21913.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 94.89 V (22.86%) | 320.1 V | 156.52 V (37.72%) | 13148.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 59.31 V (14.29%) | 355.7 V | 97.83 V (23.57%) | 8217.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 39.54 V (9.53%) | 375.5 V | 65.22 V (15.72%) | 5478.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 23.72 V (5.72%) | 391.3 V | 39.13 V (9.43%) | 3287.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 14.83 V (3.57%) | 400.2 V | 24.46 V (5.89%) | 2054.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 9.49 V (2.29%) | 405.5 V | 15.65 V (3.77%) | 1314.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 6.78 V (1.63%) | 408.2 V | 11.18 V (2.69%) | 939.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 4.74 V (1.14%) | 410.3 V | 7.83 V (1.89%) | 657.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 3.39 V (0.82%) | 411.6 V | 5.59 V (1.35%) | 469.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 2.5 V (0.6%) | 412.5 V | 4.12 V (0.99%) | 346.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.98 V (0.48%) | 413.0 V | 3.26 V (0.79%) | 273.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.58 V (0.38%) | 413.4 V | 2.61 V (0.63%) | 219.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.28 V (0.31%) | 413.7 V | 2.12 V (0.51%) | 177.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.99 V (0.24%) | 414.0 V | 1.63 V (0.39%) | 137.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.79 V (0.19%) | 414.2 V | 1.3 V (0.31%) | 109.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.59 V (0.14%) | 414.4 V | 0.98 V (0.24%) | 82.2 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 80A at 80 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 80m at 415V (voltage drop: 9.49V or 2.29%).
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)80A · 70m (415V)10A · 80m (415V)16A · 80m (415V)20A · 80m (415V)25A · 80m (415V)32A · 80m (415V)40A · 80m (415V)50A · 80m (415V)63A · 80m (415V)100A · 80m (415V)125A · 80m (415V)160A · 80m (415V)200A · 80m (415V)