15 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 15 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 11.12V (2.68%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 12.23V (2.95%)
Voltage at Load403.9 VLine Loss: 288.9 W
Max Power & Breaker10.78 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A 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 | 29.65 V (7.15%) | 385.3 V | 48.91 V (11.79%) | 770.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 17.79 V (4.29%) | 397.2 V | 29.35 V (7.07%) | 462.2 W | ~ ≤5% |
| 4 mm² | 32 A | 25 A | 11.12 V (2.68%) | 403.9 V | 18.34 V (4.42%) | 288.9 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 7.41 V (1.79%) | 407.6 V | 12.23 V (2.95%) | 192.6 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 4.45 V (1.07%) | 410.6 V | 7.34 V (1.77%) | 115.6 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 2.78 V (0.67%) | 412.2 V | 4.59 V (1.1%) | 72.2 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.78 V (0.43%) | 413.2 V | 2.93 V (0.71%) | 46.2 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.27 V (0.31%) | 413.7 V | 2.1 V (0.51%) | 33.0 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.89 V (0.21%) | 414.1 V | 1.47 V (0.35%) | 23.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.64 V (0.15%) | 414.4 V | 1.05 V (0.25%) | 16.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.47 V (0.11%) | 414.5 V | 0.77 V (0.19%) | 12.2 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.37 V (0.09%) | 414.6 V | 0.61 V (0.15%) | 9.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.3 V (0.07%) | 414.7 V | 0.49 V (0.12%) | 7.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.24 V (0.06%) | 414.8 V | 0.4 V (0.1%) | 6.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.19 V (0.04%) | 414.8 V | 0.31 V (0.07%) | 4.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.15 V (0.04%) | 414.9 V | 0.24 V (0.06%) | 3.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.11 V (0.03%) | 414.9 V | 0.18 V (0.04%) | 2.9 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 15A at 80 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 15A over 80m at 415V (voltage drop: 11.12V or 2.68%).
What is the power capacity of 15A at 415V?
At unity power factor, 15A at 415V supports 10.78 kW with a standard 15A circuit breaker.
Related Lengths & Currents (415V)
15A · 5m (415V)15A · 10m (415V)15A · 15m (415V)15A · 20m (415V)15A · 25m (415V)15A · 30m (415V)15A · 35m (415V)15A · 40m (415V)15A · 45m (415V)15A · 50m (415V)15A · 60m (415V)15A · 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)80A · 80m (415V)100A · 80m (415V)125A · 80m (415V)160A · 80m (415V)200A · 80m (415V)