400 Amp Cable Size at 400 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 400 m (1312.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 19.77V (2.86%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 24.46V (3.54%)
Voltage at Load670.2 VLine Loss: 13696.0 W
Max Power & Breaker478.05 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 400m
| 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 | 3953.69 V (573.0%) | 0.0 V | 6521.75 V (945.18%) | 2739200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2372.22 V (343.8%) | 0.0 V | 3913.05 V (567.11%) | 1643520.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1482.64 V (214.87%) | 0.0 V | 2445.66 V (354.44%) | 1027200.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 988.42 V (143.25%) | 0.0 V | 1630.44 V (236.3%) | 684800.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 593.05 V (85.95%) | 96.9 V | 978.26 V (141.78%) | 410880.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 370.66 V (53.72%) | 319.3 V | 611.41 V (88.61%) | 256800.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 237.22 V (34.38%) | 452.8 V | 391.3 V (56.71%) | 164352.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 169.44 V (24.56%) | 520.6 V | 279.5 V (40.51%) | 117394.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 118.61 V (17.19%) | 571.4 V | 195.65 V (28.36%) | 82176.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 84.72 V (12.28%) | 605.3 V | 139.75 V (20.25%) | 58697.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 62.43 V (9.05%) | 627.6 V | 102.97 V (14.92%) | 43250.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 49.42 V (7.16%) | 640.6 V | 81.52 V (11.81%) | 34240.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 39.54 V (5.73%) | 650.5 V | 65.22 V (9.45%) | 27392.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 32.06 V (4.65%) | 657.9 V | 52.88 V (7.66%) | 22209.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 24.71 V (3.58%) | 665.3 V | 40.76 V (5.91%) | 17120.0 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 19.77 V (2.86%) | 670.2 V | 32.61 V (4.73%) | 13696.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 14.83 V (2.15%) | 675.2 V | 24.46 V (3.54%) | 10272.0 W | ✓ OK (≤3%) |
FAQ — 400 Amp Cable Size at 400 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 400A at 400 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 400m at 690V (voltage drop: 19.77V or 2.86%).
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 · 400m (690V)16A · 400m (690V)20A · 400m (690V)25A · 400m (690V)32A · 400m (690V)40A · 400m (690V)50A · 400m (690V)63A · 400m (690V)80A · 400m (690V)100A · 400m (690V)125A · 400m (690V)160A · 400m (690V)200A · 400m (690V)