250 Amp Cable Size at 35 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 35 m (114.8 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 2.7V (0.65%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 2.89V (0.7%)
Voltage at Load412.3 VLine Loss: 1170.3 W
Max Power & Breaker179.7 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 35m
| 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%) | 93625.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 129.73 V (31.26%) | 285.3 V | 213.99 V (51.57%) | 56175.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 81.08 V (19.54%) | 333.9 V | 133.75 V (32.23%) | 35109.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 54.05 V (13.03%) | 360.9 V | 89.16 V (21.49%) | 23406.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 32.43 V (7.82%) | 382.6 V | 53.5 V (12.89%) | 14043.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 20.27 V (4.88%) | 394.7 V | 33.44 V (8.06%) | 8777.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 5617.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 9.27 V (2.23%) | 405.7 V | 15.29 V (3.68%) | 4012.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 6.49 V (1.56%) | 408.5 V | 10.7 V (2.58%) | 2808.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 4.63 V (1.12%) | 410.4 V | 7.64 V (1.84%) | 2006.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.41 V (0.82%) | 411.6 V | 5.63 V (1.36%) | 1478.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.7 V (0.65%) | 412.3 V | 4.46 V (1.07%) | 1170.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.16 V (0.52%) | 412.8 V | 3.57 V (0.86%) | 936.2 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.75 V (0.42%) | 413.2 V | 2.89 V (0.7%) | 759.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.35 V (0.33%) | 413.6 V | 2.23 V (0.54%) | 585.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.08 V (0.26%) | 413.9 V | 1.78 V (0.43%) | 468.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.81 V (0.2%) | 414.2 V | 1.34 V (0.32%) | 351.1 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 35 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 250A at 35 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 250A over 35m at 415V (voltage drop: 2.7V or 0.65%).
What is the power capacity of 250A at 415V?
At unity power factor, 250A at 415V supports 179.7 kW with a standard 250A circuit breaker.
Related Lengths & Currents (415V)
250A · 5m (415V)250A · 10m (415V)250A · 15m (415V)250A · 20m (415V)250A · 25m (415V)250A · 30m (415V)250A · 40m (415V)250A · 45m (415V)250A · 50m (415V)250A · 60m (415V)250A · 70m (415V)10A · 35m (415V)16A · 35m (415V)20A · 35m (415V)25A · 35m (415V)32A · 35m (415V)40A · 35m (415V)50A · 35m (415V)63A · 35m (415V)80A · 35m (415V)100A · 35m (415V)125A · 35m (415V)160A · 35m (415V)200A · 35m (415V)