400 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 3.09V (0.45%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.06V (0.44%)
Voltage at Load686.9 VLine Loss: 2140.0 W
Max Power & Breaker478.05 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 50m
| 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 | 494.21 V (71.62%) | 195.8 V | 815.22 V (118.15%) | 342400.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 296.53 V (42.97%) | 393.5 V | 489.13 V (70.89%) | 205440.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 185.33 V (26.86%) | 504.7 V | 305.71 V (44.31%) | 128400.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 123.55 V (17.91%) | 566.4 V | 203.8 V (29.54%) | 85600.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 51360.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 46.33 V (6.71%) | 643.7 V | 76.43 V (11.08%) | 32100.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 20544.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 21.18 V (3.07%) | 668.8 V | 34.94 V (5.06%) | 14674.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 14.83 V (2.15%) | 675.2 V | 24.46 V (3.54%) | 10272.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.59 V (1.53%) | 679.4 V | 17.47 V (2.53%) | 7337.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.8 V (1.13%) | 682.2 V | 12.87 V (1.87%) | 5406.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.18 V (0.9%) | 683.8 V | 10.19 V (1.48%) | 4280.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.94 V (0.72%) | 685.1 V | 8.15 V (1.18%) | 3424.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.01 V (0.58%) | 686.0 V | 6.61 V (0.96%) | 2776.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.09 V (0.45%) | 686.9 V | 5.1 V (0.74%) | 2140.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.47 V (0.36%) | 687.5 V | 4.08 V (0.59%) | 1712.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.85 V (0.27%) | 688.1 V | 3.06 V (0.44%) | 1284.0 W | ✓ OK (≤3%) |
FAQ — 400 Amp Cable Size at 50 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 400A at 50 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 400A over 50m at 690V (voltage drop: 3.09V or 0.45%).
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 · 60m (690V)400A · 70m (690V)10A · 50m (690V)16A · 50m (690V)20A · 50m (690V)25A · 50m (690V)32A · 50m (690V)40A · 50m (690V)50A · 50m (690V)63A · 50m (690V)80A · 50m (690V)100A · 50m (690V)125A · 50m (690V)160A · 50m (690V)200A · 50m (690V)