45 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 45 A over 45 m (147.6 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 7.51V (1.81%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 7.74V (1.86%)
Voltage at Load407.5 VLine Loss: 585.0 W
Max Power & Breaker32.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A 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 | 50.04 V (12.06%) | 365.0 V | 82.54 V (19.89%) | 3900.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 30.02 V (7.23%) | 385.0 V | 49.52 V (11.93%) | 2340.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 18.76 V (4.52%) | 396.2 V | 30.95 V (7.46%) | 1462.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 12.51 V (3.01%) | 402.5 V | 20.64 V (4.97%) | 975.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 7.51 V (1.81%) | 407.5 V | 12.38 V (2.98%) | 585.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 4.69 V (1.13%) | 410.3 V | 7.74 V (1.86%) | 365.6 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.0 V (0.72%) | 412.0 V | 4.95 V (1.19%) | 234.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.14 V (0.52%) | 412.9 V | 3.54 V (0.85%) | 167.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.5 V (0.36%) | 413.5 V | 2.48 V (0.6%) | 117.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.07 V (0.26%) | 413.9 V | 1.77 V (0.43%) | 83.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.79 V (0.19%) | 414.2 V | 1.3 V (0.31%) | 61.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.63 V (0.15%) | 414.4 V | 1.03 V (0.25%) | 48.8 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.5 V (0.12%) | 414.5 V | 0.83 V (0.2%) | 39.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.41 V (0.1%) | 414.6 V | 0.67 V (0.16%) | 31.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.31 V (0.08%) | 414.7 V | 0.52 V (0.12%) | 24.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.25 V (0.06%) | 414.7 V | 0.41 V (0.1%) | 19.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.19 V (0.05%) | 414.8 V | 0.31 V (0.07%) | 14.6 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 45 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 45A at 45 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 45A over 45m at 415V (voltage drop: 7.51V or 1.81%).
What is the power capacity of 45A at 415V?
At unity power factor, 45A at 415V supports 32.35 kW with a standard 45A circuit breaker.
Related Lengths & Currents (415V)
45A · 5m (415V)45A · 10m (415V)45A · 15m (415V)45A · 20m (415V)45A · 25m (415V)45A · 30m (415V)45A · 35m (415V)45A · 40m (415V)45A · 50m (415V)45A · 60m (415V)45A · 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)