350 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 8.41V (2.03%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 8.56V (2.06%)
Voltage at Load406.6 VLine Loss: 5101.3 W
Max Power & Breaker251.58 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A at 120m
| 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 | 1037.84 V (250.08%) | 0.0 V | 1711.96 V (412.52%) | 629160.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 622.71 V (150.05%) | 0.0 V | 1027.18 V (247.51%) | 377496.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 389.19 V (93.78%) | 25.8 V | 641.98 V (154.7%) | 235935.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 259.46 V (62.52%) | 155.5 V | 427.99 V (103.13%) | 157290.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 155.68 V (37.51%) | 259.3 V | 256.79 V (61.88%) | 94374.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 97.3 V (23.45%) | 317.7 V | 160.5 V (38.67%) | 58983.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 62.27 V (15.0%) | 352.7 V | 102.72 V (24.75%) | 37749.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 44.48 V (10.72%) | 370.5 V | 73.37 V (17.68%) | 26964.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 31.14 V (7.5%) | 383.9 V | 51.36 V (12.38%) | 18874.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 22.24 V (5.36%) | 392.8 V | 36.68 V (8.84%) | 13482.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 16.39 V (3.95%) | 398.6 V | 27.03 V (6.51%) | 9934.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 7864.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 10.38 V (2.5%) | 404.6 V | 17.12 V (4.13%) | 6291.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 8.41 V (2.03%) | 406.6 V | 13.88 V (3.34%) | 5101.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 6.49 V (1.56%) | 408.5 V | 10.7 V (2.58%) | 3932.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 5.19 V (1.25%) | 409.8 V | 8.56 V (2.06%) | 3145.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.89 V (0.94%) | 411.1 V | 6.42 V (1.55%) | 2359.3 W | ✓ OK (≤3%) |
FAQ — 350 Amp Cable Size at 120 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 350A at 120 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 120m at 415V (voltage drop: 8.41V or 2.03%).
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)350A · 70m (415V)10A · 120m (415V)16A · 120m (415V)20A · 120m (415V)25A · 120m (415V)32A · 120m (415V)40A · 120m (415V)50A · 120m (415V)63A · 120m (415V)80A · 120m (415V)100A · 120m (415V)125A · 120m (415V)160A · 120m (415V)200A · 120m (415V)