45 Amp Cable Size at 175 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 175 m (574.1 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 11.68V (2.81%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 9.63V (2.32%)
Voltage at Load403.3 VLine Loss: 910.0 W
Max Power & Breaker32.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 175m
| 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 | 194.6 V (46.89%) | 220.4 V | 320.99 V (77.35%) | 15167.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 116.76 V (28.13%) | 298.2 V | 192.6 V (46.41%) | 9100.3 W | Drop High |
| 4 mm² | 32 A | 25 A | 72.97 V (17.58%) | 342.0 V | 120.37 V (29.01%) | 5687.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 48.65 V (11.72%) | 366.4 V | 80.25 V (19.34%) | 3791.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 29.19 V (7.03%) | 385.8 V | 48.15 V (11.6%) | 2275.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 18.24 V (4.4%) | 396.8 V | 30.09 V (7.25%) | 1421.9 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 11.68 V (2.81%) | 403.3 V | 19.26 V (4.64%) | 910.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 8.34 V (2.01%) | 406.7 V | 13.76 V (3.31%) | 650.0 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 5.84 V (1.41%) | 409.2 V | 9.63 V (2.32%) | 455.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 4.17 V (1.0%) | 410.8 V | 6.88 V (1.66%) | 325.0 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 3.07 V (0.74%) | 411.9 V | 5.07 V (1.22%) | 239.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 2.43 V (0.59%) | 412.6 V | 4.01 V (0.97%) | 189.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.95 V (0.47%) | 413.1 V | 3.21 V (0.77%) | 151.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.58 V (0.38%) | 413.4 V | 2.6 V (0.63%) | 123.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.22 V (0.29%) | 413.8 V | 2.01 V (0.48%) | 94.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.97 V (0.23%) | 414.0 V | 1.6 V (0.39%) | 75.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.73 V (0.18%) | 414.3 V | 1.2 V (0.29%) | 56.9 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 175 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 45A at 175 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 45A over 175m at 415V (voltage drop: 11.68V or 2.81%).
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 · 45m (415V)45A · 50m (415V)45A · 60m (415V)45A · 70m (415V)10A · 175m (415V)16A · 175m (415V)20A · 175m (415V)25A · 175m (415V)32A · 175m (415V)40A · 175m (415V)50A · 175m (415V)63A · 175m (415V)80A · 175m (415V)100A · 175m (415V)125A · 175m (415V)160A · 175m (415V)200A · 175m (415V)