800 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 4.45V (1.07%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 14.67V (3.54%)
Voltage at Load410.6 VLine Loss: 6163.2 W
Max Power & Breaker575.04 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 120m
| 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 | 2372.22 V (571.62%) | 0.0 V | 3913.05 V (942.9%) | 3287040.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1423.33 V (342.97%) | 0.0 V | 2347.83 V (565.74%) | 1972224.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 889.58 V (214.36%) | 0.0 V | 1467.39 V (353.59%) | 1232640.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 593.05 V (142.9%) | 0.0 V | 978.26 V (235.73%) | 821760.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 355.83 V (85.74%) | 59.2 V | 586.96 V (141.44%) | 493056.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 222.4 V (53.59%) | 192.6 V | 366.85 V (88.4%) | 308160.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 142.33 V (34.3%) | 272.7 V | 234.78 V (56.57%) | 197222.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 101.67 V (24.5%) | 313.3 V | 167.7 V (40.41%) | 140873.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 71.17 V (17.15%) | 343.8 V | 117.39 V (28.29%) | 98611.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 50.83 V (12.25%) | 364.2 V | 83.85 V (20.21%) | 70436.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 37.46 V (9.03%) | 377.5 V | 61.78 V (14.89%) | 51900.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 29.65 V (7.15%) | 385.3 V | 48.91 V (11.79%) | 41088.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 23.72 V (5.72%) | 391.3 V | 39.13 V (9.43%) | 32870.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 19.23 V (4.63%) | 395.8 V | 31.73 V (7.65%) | 26651.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 14.83 V (3.57%) | 400.2 V | 24.46 V (5.89%) | 20544.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 11.86 V (2.86%) | 403.1 V | 19.57 V (4.71%) | 16435.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 8.9 V (2.14%) | 406.1 V | 14.67 V (3.54%) | 12326.4 W | Drop High |
FAQ — 800 Amp Cable Size at 120 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 800A at 120 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 120m at 415V (voltage drop: 4.45V or 1.07%).
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)800A · 70m (415V)10A · 120m (415V)16A · 120m (415V)20A · 120m (415V)25A · 120m (415V)32A · 120m (415V)40A · 120m (415V)50A · 120m (415V)63A · 120m (415V)80A · 120m (415V)100A · 120m (415V)125A · 120m (415V)160A · 120m (415V)200A · 120m (415V)