300 Amp Cable Size at 350 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 350 m (1148.3 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 9.73V (2.43%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 16.05V (4.01%)
Voltage at Load390.3 VLine Loss: 5055.8 W
Max Power & Breaker207.85 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A 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 | 2594.61 V (648.65%) | 0.0 V | 4279.9 V (1069.97%) | 1348200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1556.77 V (389.19%) | 0.0 V | 2567.94 V (641.98%) | 808920.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 972.98 V (243.24%) | 0.0 V | 1604.96 V (401.24%) | 505575.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 648.65 V (162.16%) | 0.0 V | 1069.97 V (267.49%) | 337050.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 389.19 V (97.3%) | 10.8 V | 641.98 V (160.5%) | 202230.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 243.24 V (60.81%) | 156.8 V | 401.24 V (100.31%) | 126393.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 155.68 V (38.92%) | 244.3 V | 256.79 V (64.2%) | 80892.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 111.2 V (27.8%) | 288.8 V | 183.42 V (45.86%) | 57780.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 77.84 V (19.46%) | 322.2 V | 128.4 V (32.1%) | 40446.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 55.6 V (13.9%) | 344.4 V | 91.71 V (22.93%) | 28890.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 40.97 V (10.24%) | 359.0 V | 67.58 V (16.89%) | 21287.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 32.43 V (8.11%) | 367.6 V | 53.5 V (13.37%) | 16852.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 25.95 V (6.49%) | 374.1 V | 42.8 V (10.7%) | 13482.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 21.04 V (5.26%) | 379.0 V | 34.7 V (8.68%) | 10931.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 16.22 V (4.05%) | 383.8 V | 26.75 V (6.69%) | 8426.2 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 12.97 V (3.24%) | 387.0 V | 21.4 V (5.35%) | 6741.0 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 9.73 V (2.43%) | 390.3 V | 16.05 V (4.01%) | 5055.8 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 350 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 300A at 350 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 300A over 350m at 400V (voltage drop: 9.73V or 2.43%).
What is the power capacity of 300A at 400V?
At unity power factor, 300A at 400V supports 207.85 kW with a standard 300A circuit breaker.
Related Lengths & Currents (400V)
300A · 5m (400V)300A · 10m (400V)300A · 15m (400V)300A · 20m (400V)300A · 25m (400V)300A · 30m (400V)300A · 35m (400V)300A · 40m (400V)300A · 45m (400V)300A · 50m (400V)300A · 60m (400V)300A · 70m (400V)10A · 350m (400V)16A · 350m (400V)20A · 350m (400V)25A · 350m (400V)32A · 350m (400V)40A · 350m (400V)50A · 350m (400V)63A · 350m (400V)80A · 350m (400V)100A · 350m (400V)125A · 350m (400V)160A · 350m (400V)200A · 350m (400V)