350 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 350 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 4.91V (1.18%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 4.99V (1.2%)
Voltage at Load410.1 VLine Loss: 2975.8 W
Max Power & Breaker251.58 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A at 70m
| 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 | 605.41 V (145.88%) | 0.0 V | 998.64 V (240.64%) | 367010.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 363.25 V (87.53%) | 51.8 V | 599.19 V (144.38%) | 220206.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 227.03 V (54.71%) | 188.0 V | 374.49 V (90.24%) | 137628.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 151.35 V (36.47%) | 263.6 V | 249.66 V (60.16%) | 91752.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 90.81 V (21.88%) | 324.2 V | 149.8 V (36.1%) | 55051.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 56.76 V (13.68%) | 358.2 V | 93.62 V (22.56%) | 34407.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 36.32 V (8.75%) | 378.7 V | 59.92 V (14.44%) | 22020.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 25.95 V (6.25%) | 389.1 V | 42.8 V (10.31%) | 15729.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 18.16 V (4.38%) | 396.8 V | 29.96 V (7.22%) | 11010.3 W | Drop High |
| 70 mm² | 192 A | 150 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 7864.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 9.56 V (2.3%) | 405.4 V | 15.77 V (3.8%) | 5794.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 7.57 V (1.82%) | 407.4 V | 12.48 V (3.01%) | 4587.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 6.05 V (1.46%) | 408.9 V | 9.99 V (2.41%) | 3670.1 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.91 V (1.18%) | 410.1 V | 8.1 V (1.95%) | 2975.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.78 V (0.91%) | 411.2 V | 6.24 V (1.5%) | 2293.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.03 V (0.73%) | 412.0 V | 4.99 V (1.2%) | 1835.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.27 V (0.55%) | 412.7 V | 3.74 V (0.9%) | 1376.3 W | ✓ OK (≤3%) |
FAQ — 350 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 350A at 70 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 185 mm² copper cable for 350A over 70m at 415V (voltage drop: 4.91V or 1.18%).
What is the power capacity of 350A at 415V?
At unity power factor, 350A at 415V supports 251.58 kW with a standard 350A circuit breaker.
Related Lengths & Currents (415V)
350A · 5m (415V)350A · 10m (415V)350A · 15m (415V)350A · 20m (415V)350A · 25m (415V)350A · 30m (415V)350A · 35m (415V)350A · 40m (415V)350A · 45m (415V)350A · 50m (415V)350A · 60m (415V)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)80A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)