45 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 5.42V (2.36%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 5.72V (2.49%)
Voltage at Load224.6 VLine Loss: 243.8 W
Max Power & Breaker10.35 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 | 57.78 V (25.12%) | 172.2 V | 95.31 V (41.44%) | 2600.1 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 34.67 V (15.07%) | 195.3 V | 57.19 V (24.86%) | 1560.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 21.67 V (9.42%) | 208.3 V | 35.74 V (15.54%) | 975.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 14.45 V (6.28%) | 215.6 V | 23.83 V (10.36%) | 650.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 8.67 V (3.77%) | 221.3 V | 14.3 V (6.22%) | 390.0 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 5.42 V (2.36%) | 224.6 V | 8.94 V (3.88%) | 243.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.47 V (1.51%) | 226.5 V | 5.72 V (2.49%) | 156.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.48 V (1.08%) | 227.5 V | 4.08 V (1.78%) | 111.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.73 V (0.75%) | 228.3 V | 2.86 V (1.24%) | 78.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.24 V (0.54%) | 228.8 V | 2.04 V (0.89%) | 55.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.91 V (0.4%) | 229.1 V | 1.5 V (0.65%) | 41.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.72 V (0.31%) | 229.3 V | 1.19 V (0.52%) | 32.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.58 V (0.25%) | 229.4 V | 0.95 V (0.41%) | 26.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.47 V (0.2%) | 229.5 V | 0.77 V (0.34%) | 21.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.36 V (0.16%) | 229.6 V | 0.6 V (0.26%) | 16.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.29 V (0.13%) | 229.7 V | 0.48 V (0.21%) | 13.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.22 V (0.09%) | 229.8 V | 0.36 V (0.16%) | 9.8 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 45 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 45A at 45 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 45m at 230V (voltage drop: 5.42V or 2.36%).
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 · 50m (230V)45A · 60m (230V)45A · 70m (230V)10A · 45m (230V)16A · 45m (230V)20A · 45m (230V)25A · 45m (230V)32A · 45m (230V)40A · 45m (230V)50A · 45m (230V)63A · 45m (230V)80A · 45m (230V)100A · 45m (230V)125A · 45m (230V)160A · 45m (230V)200A · 45m (230V)