350 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 350 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 16.22V (2.35%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 16.05V (2.33%)
Voltage at Load673.8 VLine Loss: 9830.6 W
Max Power & Breaker418.29 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A at 300m
| 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 (376.03%) | 0.0 V | 4279.9 V (620.28%) | 1572900.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1556.77 V (225.62%) | 0.0 V | 2567.94 V (372.17%) | 943740.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 972.98 V (141.01%) | 0.0 V | 1604.96 V (232.6%) | 589837.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 648.65 V (94.01%) | 41.3 V | 1069.97 V (155.07%) | 393225.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 389.19 V (56.4%) | 300.8 V | 641.98 V (93.04%) | 235935.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 243.24 V (35.25%) | 446.8 V | 401.24 V (58.15%) | 147459.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 155.68 V (22.56%) | 534.3 V | 256.79 V (37.22%) | 94374.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 111.2 V (16.12%) | 578.8 V | 183.42 V (26.58%) | 67410.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 77.84 V (11.28%) | 612.2 V | 128.4 V (18.61%) | 47187.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 33705.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 40.97 V (5.94%) | 649.0 V | 67.58 V (9.79%) | 24835.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 32.43 V (4.7%) | 657.6 V | 53.5 V (7.75%) | 19661.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 25.95 V (3.76%) | 664.1 V | 42.8 V (6.2%) | 15729.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 21.04 V (3.05%) | 669.0 V | 34.7 V (5.03%) | 12753.2 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 16.22 V (2.35%) | 673.8 V | 26.75 V (3.88%) | 9830.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 7864.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 9.73 V (1.41%) | 680.3 V | 16.05 V (2.33%) | 5898.4 W | ✓ OK (≤3%) |
FAQ — 350 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 350A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 350A over 300m at 690V (voltage drop: 16.22V or 2.35%).
What is the power capacity of 350A at 690V?
At unity power factor, 350A at 690V supports 418.29 kW with a standard 350A circuit breaker.
Related Lengths & Currents (690V)
350A · 5m (690V)350A · 10m (690V)350A · 15m (690V)350A · 20m (690V)350A · 25m (690V)350A · 30m (690V)350A · 35m (690V)350A · 40m (690V)350A · 45m (690V)350A · 50m (690V)350A · 60m (690V)350A · 70m (690V)10A · 300m (690V)16A · 300m (690V)20A · 300m (690V)25A · 300m (690V)32A · 300m (690V)40A · 300m (690V)50A · 300m (690V)63A · 300m (690V)80A · 300m (690V)100A · 300m (690V)125A · 300m (690V)160A · 300m (690V)200A · 300m (690V)