800 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 800 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 2.6V (0.62%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.56V (2.06%)
Voltage at Load412.4 VLine Loss: 3595.2 W
Max Power & Breaker575.04 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 70m
| 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 | 1383.79 V (333.44%) | 0.0 V | 2282.61 V (550.03%) | 1917440.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 830.28 V (200.07%) | 0.0 V | 1369.57 V (330.02%) | 1150464.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 518.92 V (125.04%) | 0.0 V | 855.98 V (206.26%) | 719040.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 345.95 V (83.36%) | 69.1 V | 570.65 V (137.51%) | 479360.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 207.57 V (50.02%) | 207.4 V | 342.39 V (82.5%) | 287616.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 129.73 V (31.26%) | 285.3 V | 213.99 V (51.57%) | 179760.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 83.03 V (20.01%) | 332.0 V | 136.96 V (33.0%) | 115046.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 59.31 V (14.29%) | 355.7 V | 97.83 V (23.57%) | 82176.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 41.51 V (10.0%) | 373.5 V | 68.48 V (16.5%) | 57523.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 29.65 V (7.15%) | 385.3 V | 48.91 V (11.79%) | 41088.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 21.85 V (5.26%) | 393.2 V | 36.04 V (8.68%) | 30275.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 17.3 V (4.17%) | 397.7 V | 28.53 V (6.88%) | 23968.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 13.84 V (3.33%) | 401.2 V | 22.83 V (5.5%) | 19174.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 11.22 V (2.7%) | 403.8 V | 18.51 V (4.46%) | 15546.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.65 V (2.08%) | 406.4 V | 14.27 V (3.44%) | 11984.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.92 V (1.67%) | 408.1 V | 11.41 V (2.75%) | 9587.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.19 V (1.25%) | 409.8 V | 8.56 V (2.06%) | 7190.4 W | Drop High |
FAQ — 800 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 800A at 70 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 800A over 70m at 415V (voltage drop: 2.6V or 0.62%).
What is the power capacity of 800A at 415V?
At unity power factor, 800A at 415V supports 575.04 kW with a standard 800A circuit breaker.
Related Lengths & Currents (415V)
800A · 5m (415V)800A · 10m (415V)800A · 15m (415V)800A · 20m (415V)800A · 25m (415V)800A · 30m (415V)800A · 35m (415V)800A · 40m (415V)800A · 45m (415V)800A · 50m (415V)800A · 60m (415V)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)80A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)