400 Amp Cable Size at 350 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 400 A over 350 m (1148.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 17.3V (2.51%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 21.4V (3.1%)
Voltage at Load672.7 VLine Loss: 11984.0 W
Max Power & Breaker478.05 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A 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 | 3459.48 V (501.37%) | 0.0 V | 5706.53 V (827.03%) | 2396800.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2075.69 V (300.82%) | 0.0 V | 3423.92 V (496.22%) | 1438080.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1297.31 V (188.02%) | 0.0 V | 2139.95 V (310.14%) | 898800.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 864.87 V (125.34%) | 0.0 V | 1426.63 V (206.76%) | 599200.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 518.92 V (75.21%) | 171.1 V | 855.98 V (124.06%) | 359520.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 324.33 V (47.0%) | 365.7 V | 534.99 V (77.53%) | 224700.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 207.57 V (30.08%) | 482.4 V | 342.39 V (49.62%) | 143808.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 148.26 V (21.49%) | 541.7 V | 244.57 V (35.44%) | 102720.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 103.78 V (15.04%) | 586.2 V | 171.2 V (24.81%) | 71904.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 51360.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 54.62 V (7.92%) | 635.4 V | 90.1 V (13.06%) | 37844.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 43.24 V (6.27%) | 646.8 V | 71.33 V (10.34%) | 29960.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 34.59 V (5.01%) | 655.4 V | 57.07 V (8.27%) | 23968.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 28.05 V (4.07%) | 662.0 V | 46.27 V (6.71%) | 19433.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 21.62 V (3.13%) | 668.4 V | 35.67 V (5.17%) | 14980.0 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 17.3 V (2.51%) | 672.7 V | 28.53 V (4.14%) | 11984.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 8988.0 W | ✓ OK (≤3%) |
FAQ — 400 Amp Cable Size at 350 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 400A at 350 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 400A over 350m at 690V (voltage drop: 17.3V or 2.51%).
What is the power capacity of 400A at 690V?
At unity power factor, 400A at 690V supports 478.05 kW with a standard 400A circuit breaker.
Related Lengths & Currents (690V)
400A · 5m (690V)400A · 10m (690V)400A · 15m (690V)400A · 20m (690V)400A · 25m (690V)400A · 30m (690V)400A · 35m (690V)400A · 40m (690V)400A · 45m (690V)400A · 50m (690V)400A · 60m (690V)400A · 70m (690V)10A · 350m (690V)16A · 350m (690V)20A · 350m (690V)25A · 350m (690V)32A · 350m (690V)40A · 350m (690V)50A · 350m (690V)63A · 350m (690V)80A · 350m (690V)100A · 350m (690V)125A · 350m (690V)160A · 350m (690V)200A · 350m (690V)