250 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 250 A over 350 m (1148.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 10.81V (2.61%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 13.37V (3.22%)
Voltage at Load404.2 VLine Loss: 4681.2 W
Max Power & Breaker179.7 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A 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 | 2162.18 V (521.01%) | 0.0 V | 3566.58 V (859.42%) | 936250.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1297.31 V (312.6%) | 0.0 V | 2139.95 V (515.65%) | 561750.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 810.82 V (195.38%) | 0.0 V | 1337.47 V (322.28%) | 351093.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 540.54 V (130.25%) | 0.0 V | 891.65 V (214.85%) | 234062.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 324.33 V (78.15%) | 90.7 V | 534.99 V (128.91%) | 140437.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 202.7 V (48.84%) | 212.3 V | 334.37 V (80.57%) | 87773.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 129.73 V (31.26%) | 285.3 V | 213.99 V (51.57%) | 56175.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 92.66 V (22.33%) | 322.3 V | 152.85 V (36.83%) | 40125.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 64.87 V (15.63%) | 350.1 V | 107.0 V (25.78%) | 28087.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 46.33 V (11.16%) | 368.7 V | 76.43 V (18.42%) | 20062.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 34.14 V (8.23%) | 380.9 V | 56.31 V (13.57%) | 14782.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 27.03 V (6.51%) | 388.0 V | 44.58 V (10.74%) | 11703.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 21.62 V (5.21%) | 393.4 V | 35.67 V (8.59%) | 9362.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 17.53 V (4.22%) | 397.5 V | 28.92 V (6.97%) | 7591.2 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 13.51 V (3.26%) | 401.5 V | 22.29 V (5.37%) | 5851.6 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 10.81 V (2.61%) | 404.2 V | 17.83 V (4.3%) | 4681.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 8.11 V (1.95%) | 406.9 V | 13.37 V (3.22%) | 3510.9 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 350 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 250A at 350 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 250A over 350m at 415V (voltage drop: 10.81V or 2.61%).
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 · 35m (415V)250A · 40m (415V)250A · 45m (415V)250A · 50m (415V)250A · 60m (415V)250A · 70m (415V)10A · 350m (415V)16A · 350m (415V)20A · 350m (415V)25A · 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)