400 Amp Cable Size at 100 Meters (415V Three-Phase (UK / Australia 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 (1.49%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 6.11V (1.47%)
Voltage at Load408.8 VLine Loss: 4280.0 W
Max Power & Breaker287.52 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 (238.17%) | 0.0 V | 1630.44 V (392.88%) | 684800.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 593.05 V (142.9%) | 0.0 V | 978.26 V (235.73%) | 410880.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 370.66 V (89.32%) | 44.3 V | 611.41 V (147.33%) | 256800.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 247.11 V (59.54%) | 167.9 V | 407.61 V (98.22%) | 171200.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 148.26 V (35.73%) | 266.7 V | 244.57 V (58.93%) | 102720.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 92.66 V (22.33%) | 322.3 V | 152.85 V (36.83%) | 64200.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 59.31 V (14.29%) | 355.7 V | 97.83 V (23.57%) | 41088.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 42.36 V (10.21%) | 372.6 V | 69.88 V (16.84%) | 29348.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 29.65 V (7.15%) | 385.3 V | 48.91 V (11.79%) | 20544.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 21.18 V (5.1%) | 393.8 V | 34.94 V (8.42%) | 14674.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.61 V (3.76%) | 399.4 V | 25.74 V (6.2%) | 10812.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.36 V (2.98%) | 402.6 V | 20.38 V (4.91%) | 8560.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.88 V (2.38%) | 405.1 V | 16.3 V (3.93%) | 6848.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 8.01 V (1.93%) | 407.0 V | 13.22 V (3.19%) | 5552.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 6.18 V (1.49%) | 408.8 V | 10.19 V (2.46%) | 4280.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 4.94 V (1.19%) | 410.1 V | 8.15 V (1.96%) | 3424.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.71 V (0.89%) | 411.3 V | 6.11 V (1.47%) | 2568.0 W | ✓ OK (≤3%) |
FAQ — 400 Amp Cable Size at 100 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 400A at 100 meters (415V)?
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 415V (voltage drop: 6.18V or 1.49%).
What is the power capacity of 400A at 415V?
At unity power factor, 400A at 415V supports 287.52 kW with a standard 400A circuit breaker.
Related Lengths & Currents (415V)
400A · 5m (415V)400A · 10m (415V)400A · 15m (415V)400A · 20m (415V)400A · 25m (415V)400A · 30m (415V)400A · 35m (415V)400A · 40m (415V)400A · 45m (415V)400A · 50m (415V)400A · 60m (415V)400A · 70m (415V)10A · 100m (415V)16A · 100m (415V)20A · 100m (415V)25A · 100m (415V)32A · 100m (415V)40A · 100m (415V)50A · 100m (415V)63A · 100m (415V)80A · 100m (415V)100A · 100m (415V)125A · 100m (415V)160A · 100m (415V)200A · 100m (415V)