400 Amp Cable Size at 100 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 100 m (328.1 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 6.18V (0.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 6.11V (0.89%)
Voltage at Load683.8 VLine Loss: 4280.0 W
Max Power & Breaker478.05 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 100m
| 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 | 988.42 V (143.25%) | 0.0 V | 1630.44 V (236.3%) | 684800.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 593.05 V (85.95%) | 96.9 V | 978.26 V (141.78%) | 410880.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 370.66 V (53.72%) | 319.3 V | 611.41 V (88.61%) | 256800.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 247.11 V (35.81%) | 442.9 V | 407.61 V (59.07%) | 171200.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 148.26 V (21.49%) | 541.7 V | 244.57 V (35.44%) | 102720.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 92.66 V (13.43%) | 597.3 V | 152.85 V (22.15%) | 64200.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 59.31 V (8.59%) | 630.7 V | 97.83 V (14.18%) | 41088.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 42.36 V (6.14%) | 647.6 V | 69.88 V (10.13%) | 29348.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 20544.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 21.18 V (3.07%) | 668.8 V | 34.94 V (5.06%) | 14674.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.61 V (2.26%) | 674.4 V | 25.74 V (3.73%) | 10812.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.36 V (1.79%) | 677.6 V | 20.38 V (2.95%) | 8560.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.88 V (1.43%) | 680.1 V | 16.3 V (2.36%) | 6848.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 8.01 V (1.16%) | 682.0 V | 13.22 V (1.92%) | 5552.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 6.18 V (0.9%) | 683.8 V | 10.19 V (1.48%) | 4280.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 4.94 V (0.72%) | 685.1 V | 8.15 V (1.18%) | 3424.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.71 V (0.54%) | 686.3 V | 6.11 V (0.89%) | 2568.0 W | ✓ OK (≤3%) |
FAQ — 400 Amp Cable Size at 100 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 400A at 100 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 100m at 690V (voltage drop: 6.18V or 0.9%).
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 · 100m (690V)16A · 100m (690V)20A · 100m (690V)25A · 100m (690V)32A · 100m (690V)40A · 100m (690V)50A · 100m (690V)63A · 100m (690V)80A · 100m (690V)100A · 100m (690V)125A · 100m (690V)160A · 100m (690V)200A · 100m (690V)