45 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 8.34V (2.01%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 8.6V (2.07%)
Voltage at Load406.7 VLine Loss: 650.0 W
Max Power & Breaker32.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 50m
| 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 | 55.6 V (13.4%) | 359.4 V | 91.71 V (22.1%) | 4333.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 33.36 V (8.04%) | 381.6 V | 55.03 V (13.26%) | 2600.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 20.85 V (5.02%) | 394.2 V | 34.39 V (8.29%) | 1625.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 13.9 V (3.35%) | 401.1 V | 22.93 V (5.52%) | 1083.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 8.34 V (2.01%) | 406.7 V | 13.76 V (3.31%) | 650.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 5.21 V (1.26%) | 409.8 V | 8.6 V (2.07%) | 406.3 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.34 V (0.8%) | 411.7 V | 5.5 V (1.33%) | 260.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.38 V (0.57%) | 412.6 V | 3.93 V (0.95%) | 185.7 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.67 V (0.4%) | 413.3 V | 2.75 V (0.66%) | 130.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.19 V (0.29%) | 413.8 V | 1.97 V (0.47%) | 92.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.88 V (0.21%) | 414.1 V | 1.45 V (0.35%) | 68.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.69 V (0.17%) | 414.3 V | 1.15 V (0.28%) | 54.2 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.56 V (0.13%) | 414.4 V | 0.92 V (0.22%) | 43.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.45 V (0.11%) | 414.5 V | 0.74 V (0.18%) | 35.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.35 V (0.08%) | 414.7 V | 0.57 V (0.14%) | 27.1 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.28 V (0.07%) | 414.7 V | 0.46 V (0.11%) | 21.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.21 V (0.05%) | 414.8 V | 0.34 V (0.08%) | 16.3 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 50 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 45A at 50 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 50m at 415V (voltage drop: 8.34V or 2.01%).
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 · 60m (415V)45A · 70m (415V)10A · 50m (415V)16A · 50m (415V)20A · 50m (415V)25A · 50m (415V)32A · 50m (415V)40A · 50m (415V)50A · 50m (415V)63A · 50m (415V)80A · 50m (415V)100A · 50m (415V)125A · 50m (415V)160A · 50m (415V)200A · 50m (415V)