800 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy 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 (0.65%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 14.67V (2.13%)
Voltage at Load685.5 VLine Loss: 6163.2 W
Max Power & Breaker956.09 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 (343.8%) | 0.0 V | 3913.05 V (567.11%) | 3287040.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1423.33 V (206.28%) | 0.0 V | 2347.83 V (340.27%) | 1972224.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 889.58 V (128.92%) | 0.0 V | 1467.39 V (212.67%) | 1232640.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 593.05 V (85.95%) | 96.9 V | 978.26 V (141.78%) | 821760.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 355.83 V (51.57%) | 334.2 V | 586.96 V (85.07%) | 493056.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 222.4 V (32.23%) | 467.6 V | 366.85 V (53.17%) | 308160.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 142.33 V (20.63%) | 547.7 V | 234.78 V (34.03%) | 197222.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 101.67 V (14.73%) | 588.3 V | 167.7 V (24.3%) | 140873.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 71.17 V (10.31%) | 618.8 V | 117.39 V (17.01%) | 98611.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 50.83 V (7.37%) | 639.2 V | 83.85 V (12.15%) | 70436.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 37.46 V (5.43%) | 652.5 V | 61.78 V (8.95%) | 51900.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 41088.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 23.72 V (3.44%) | 666.3 V | 39.13 V (5.67%) | 32870.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 19.23 V (2.79%) | 670.8 V | 31.73 V (4.6%) | 26651.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 14.83 V (2.15%) | 675.2 V | 24.46 V (3.54%) | 20544.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 11.86 V (1.72%) | 678.1 V | 19.57 V (2.84%) | 16435.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 8.9 V (1.29%) | 681.1 V | 14.67 V (2.13%) | 12326.4 W | Drop High |
FAQ — 800 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 800A at 120 meters (690V)?
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 690V (voltage drop: 4.45V or 0.65%).
What is the power capacity of 800A at 690V?
At unity power factor, 800A at 690V supports 956.09 kW with a standard 800A circuit breaker.
Related Lengths & Currents (690V)
800A · 5m (690V)800A · 10m (690V)800A · 15m (690V)800A · 20m (690V)800A · 25m (690V)800A · 30m (690V)800A · 35m (690V)800A · 40m (690V)800A · 45m (690V)800A · 50m (690V)800A · 60m (690V)800A · 70m (690V)10A · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)80A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)