15 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)2.5 mm²Drop: 10.01V (2.41%)
Aluminum Cable (≤3% Drop)4 mm²Drop: 10.32V (2.49%)
Voltage at Load405.0 VLine Loss: 260.0 W
Max Power & Breaker10.78 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A at 45m
| 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 | 16.68 V (4.02%) | 398.3 V | 27.51 V (6.63%) | 433.4 W | ~ ≤5% |
| 2.5 mm² | 24 A | 18 A | 10.01 V (2.41%) | 405.0 V | 16.51 V (3.98%) | 260.0 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 6.25 V (1.51%) | 408.7 V | 10.32 V (2.49%) | 162.5 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 4.17 V (1.0%) | 410.8 V | 6.88 V (1.66%) | 108.3 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 2.5 V (0.6%) | 412.5 V | 4.13 V (0.99%) | 65.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 1.56 V (0.38%) | 413.4 V | 2.58 V (0.62%) | 40.6 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.0 V (0.24%) | 414.0 V | 1.65 V (0.4%) | 26.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.71 V (0.17%) | 414.3 V | 1.18 V (0.28%) | 18.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.5 V (0.12%) | 414.5 V | 0.83 V (0.2%) | 13.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.36 V (0.09%) | 414.6 V | 0.59 V (0.14%) | 9.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.26 V (0.06%) | 414.7 V | 0.43 V (0.1%) | 6.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.21 V (0.05%) | 414.8 V | 0.34 V (0.08%) | 5.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.17 V (0.04%) | 414.8 V | 0.28 V (0.07%) | 4.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.14 V (0.03%) | 414.9 V | 0.22 V (0.05%) | 3.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.1 V (0.03%) | 414.9 V | 0.17 V (0.04%) | 2.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.08 V (0.02%) | 414.9 V | 0.14 V (0.03%) | 2.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.06 V (0.02%) | 414.9 V | 0.1 V (0.02%) | 1.6 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 45 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 15A at 45 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2.5 mm² copper cable for 15A over 45m at 415V (voltage drop: 10.01V or 2.41%).
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 · 50m (415V)15A · 60m (415V)15A · 70m (415V)10A · 45m (415V)16A · 45m (415V)20A · 45m (415V)25A · 45m (415V)32A · 45m (415V)40A · 45m (415V)50A · 45m (415V)63A · 45m (415V)80A · 45m (415V)100A · 45m (415V)125A · 45m (415V)160A · 45m (415V)200A · 45m (415V)