45 Amp Cable Size at 50 Meters (230V Single-Phase (IEC Europe / UK / AU))
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)16 mm²Drop: 6.02V (2.62%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 6.35V (2.76%)
Voltage at Load224.0 VLine Loss: 270.8 W
Max Power & Breaker10.35 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 | 64.2 V (27.91%) | 165.8 V | 105.9 V (46.04%) | 2889.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 38.52 V (16.75%) | 191.5 V | 63.54 V (27.63%) | 1733.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 24.07 V (10.47%) | 205.9 V | 39.71 V (17.27%) | 1083.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 16.05 V (6.98%) | 213.9 V | 26.47 V (11.51%) | 722.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 9.63 V (4.19%) | 220.4 V | 15.88 V (6.91%) | 433.3 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 6.02 V (2.62%) | 224.0 V | 9.93 V (4.32%) | 270.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.85 V (1.67%) | 226.1 V | 6.35 V (2.76%) | 173.3 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.75 V (1.2%) | 227.2 V | 4.54 V (1.97%) | 123.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.93 V (0.84%) | 228.1 V | 3.18 V (1.38%) | 86.7 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.38 V (0.6%) | 228.6 V | 2.27 V (0.99%) | 61.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.01 V (0.44%) | 229.0 V | 1.67 V (0.73%) | 45.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.8 V (0.35%) | 229.2 V | 1.32 V (0.58%) | 36.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.64 V (0.28%) | 229.4 V | 1.06 V (0.46%) | 28.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.52 V (0.23%) | 229.5 V | 0.86 V (0.37%) | 23.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.4 V (0.17%) | 229.6 V | 0.66 V (0.29%) | 18.1 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.32 V (0.14%) | 229.7 V | 0.53 V (0.23%) | 14.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.24 V (0.1%) | 229.8 V | 0.4 V (0.17%) | 10.8 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 50 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 45A at 50 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 45A over 50m at 230V (voltage drop: 6.02V or 2.62%).
What is the power capacity of 45A at 230V?
At unity power factor, 45A at 230V supports 10.35 kW with a standard 45A circuit breaker.
Related Lengths & Currents (230V)
45A · 5m (230V)45A · 10m (230V)45A · 15m (230V)45A · 20m (230V)45A · 25m (230V)45A · 30m (230V)45A · 35m (230V)45A · 40m (230V)45A · 45m (230V)45A · 60m (230V)45A · 70m (230V)10A · 50m (230V)16A · 50m (230V)20A · 50m (230V)25A · 50m (230V)32A · 50m (230V)40A · 50m (230V)50A · 50m (230V)63A · 50m (230V)80A · 50m (230V)100A · 50m (230V)125A · 50m (230V)160A · 50m (230V)200A · 50m (230V)