45 Amp Cable Size at 250 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 250 m (820.2 ft).
Copper Cable (≤3% Drop)70 mm²Drop: 6.88V (2.99%)
Aluminum Cable (≤3% Drop)120 mm²Drop: 6.62V (2.88%)
Voltage at Load223.1 VLine Loss: 309.5 W
Max Power & Breaker10.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 250m
| 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 | 321.0 V (139.57%) | 0.0 V | 529.5 V (230.22%) | 14445.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 192.6 V (83.74%) | 37.4 V | 317.7 V (138.13%) | 8667.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 120.37 V (52.34%) | 109.6 V | 198.56 V (86.33%) | 5416.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 80.25 V (34.89%) | 149.8 V | 132.38 V (57.55%) | 3611.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 48.15 V (20.93%) | 181.9 V | 79.42 V (34.53%) | 2166.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 30.09 V (13.08%) | 199.9 V | 49.64 V (21.58%) | 1354.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 19.26 V (8.37%) | 210.7 V | 31.77 V (13.81%) | 866.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 13.76 V (5.98%) | 216.2 V | 22.69 V (9.87%) | 619.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 9.63 V (4.19%) | 220.4 V | 15.88 V (6.91%) | 433.3 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 6.88 V (2.99%) | 223.1 V | 11.35 V (4.93%) | 309.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 5.07 V (2.2%) | 224.9 V | 8.36 V (3.64%) | 228.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 4.01 V (1.74%) | 226.0 V | 6.62 V (2.88%) | 180.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 3.21 V (1.4%) | 226.8 V | 5.29 V (2.3%) | 144.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 2.6 V (1.13%) | 227.4 V | 4.29 V (1.87%) | 117.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.01 V (0.87%) | 228.0 V | 3.31 V (1.44%) | 90.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.6 V (0.7%) | 228.4 V | 2.65 V (1.15%) | 72.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.2 V (0.52%) | 228.8 V | 1.99 V (0.86%) | 54.2 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 250 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 45A at 250 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 70 mm² copper cable for 45A over 250m at 230V (voltage drop: 6.88V or 2.99%).
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 · 50m (230V)45A · 60m (230V)45A · 70m (230V)10A · 250m (230V)16A · 250m (230V)20A · 250m (230V)25A · 250m (230V)32A · 250m (230V)40A · 250m (230V)50A · 250m (230V)63A · 250m (230V)80A · 250m (230V)100A · 250m (230V)125A · 250m (230V)160A · 250m (230V)200A · 250m (230V)