800 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 2.96V (0.43%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 9.78V (1.42%)
Voltage at Load687.0 VLine Loss: 4108.8 W
Max Power & Breaker956.09 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 80m
| 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 | 1581.48 V (229.2%) | 0.0 V | 2608.7 V (378.07%) | 2191360.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 948.89 V (137.52%) | 0.0 V | 1565.22 V (226.84%) | 1314816.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 593.05 V (85.95%) | 96.9 V | 978.26 V (141.78%) | 821760.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 395.37 V (57.3%) | 294.6 V | 652.17 V (94.52%) | 547840.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 237.22 V (34.38%) | 452.8 V | 391.3 V (56.71%) | 328704.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 148.26 V (21.49%) | 541.7 V | 244.57 V (35.44%) | 205440.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 94.89 V (13.75%) | 595.1 V | 156.52 V (22.68%) | 131481.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 67.78 V (9.82%) | 622.2 V | 111.8 V (16.2%) | 93915.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 47.44 V (6.88%) | 642.6 V | 78.26 V (11.34%) | 65740.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 33.89 V (4.91%) | 656.1 V | 55.9 V (8.1%) | 46957.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 24.97 V (3.62%) | 665.0 V | 41.19 V (5.97%) | 34600.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 19.77 V (2.86%) | 670.2 V | 32.61 V (4.73%) | 27392.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 15.81 V (2.29%) | 674.2 V | 26.09 V (3.78%) | 21913.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 12.82 V (1.86%) | 677.2 V | 21.15 V (3.07%) | 17767.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 9.88 V (1.43%) | 680.1 V | 16.3 V (2.36%) | 13696.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 7.91 V (1.15%) | 682.1 V | 13.04 V (1.89%) | 10956.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.93 V (0.86%) | 684.1 V | 9.78 V (1.42%) | 8217.6 W | Drop High |
FAQ — 800 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 800A at 80 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 80m at 690V (voltage drop: 2.96V or 0.43%).
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 · 80m (690V)16A · 80m (690V)20A · 80m (690V)25A · 80m (690V)32A · 80m (690V)40A · 80m (690V)50A · 80m (690V)63A · 80m (690V)80A · 80m (690V)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)