25 Amp Cable Size at 350 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 350 m (1148.3 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 9.27V (2.23%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 10.7V (2.58%)
Voltage at Load405.7 VLine Loss: 401.2 W
Max Power & Breaker17.97 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A at 350m
| 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 | 216.22 V (52.1%) | 198.8 V | 356.66 V (85.94%) | 9362.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 129.73 V (31.26%) | 285.3 V | 213.99 V (51.57%) | 5617.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 81.08 V (19.54%) | 333.9 V | 133.75 V (32.23%) | 3510.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 54.05 V (13.03%) | 360.9 V | 89.16 V (21.49%) | 2340.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 32.43 V (7.82%) | 382.6 V | 53.5 V (12.89%) | 1404.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 20.27 V (4.88%) | 394.7 V | 33.44 V (8.06%) | 877.7 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 561.8 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 9.27 V (2.23%) | 405.7 V | 15.29 V (3.68%) | 401.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 6.49 V (1.56%) | 408.5 V | 10.7 V (2.58%) | 280.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 4.63 V (1.12%) | 410.4 V | 7.64 V (1.84%) | 200.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 3.41 V (0.82%) | 411.6 V | 5.63 V (1.36%) | 147.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 2.7 V (0.65%) | 412.3 V | 4.46 V (1.07%) | 117.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.16 V (0.52%) | 412.8 V | 3.57 V (0.86%) | 93.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.75 V (0.42%) | 413.2 V | 2.89 V (0.7%) | 75.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.35 V (0.33%) | 413.6 V | 2.23 V (0.54%) | 58.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.08 V (0.26%) | 413.9 V | 1.78 V (0.43%) | 46.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.81 V (0.2%) | 414.2 V | 1.34 V (0.32%) | 35.1 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 350 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 25A at 350 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 25A over 350m at 415V (voltage drop: 9.27V or 2.23%).
What is the power capacity of 25A at 415V?
At unity power factor, 25A at 415V supports 17.97 kW with a standard 25A circuit breaker.
Related Lengths & Currents (415V)
25A · 5m (415V)25A · 10m (415V)25A · 15m (415V)25A · 20m (415V)25A · 25m (415V)25A · 30m (415V)25A · 35m (415V)25A · 40m (415V)25A · 45m (415V)25A · 50m (415V)25A · 60m (415V)25A · 70m (415V)10A · 350m (415V)16A · 350m (415V)20A · 350m (415V)32A · 350m (415V)40A · 350m (415V)50A · 350m (415V)63A · 350m (415V)80A · 350m (415V)100A · 350m (415V)125A · 350m (415V)160A · 350m (415V)200A · 350m (415V)