800 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 12.97V (1.88%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 42.8V (6.2%)
Voltage at Load677.0 VLine Loss: 17976.0 W
Max Power & Breaker956.09 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 350m
| 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 | 6918.97 V (1002.75%) | 0.0 V | 11413.06 V (1654.07%) | 9587200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 4151.38 V (601.65%) | 0.0 V | 6847.84 V (992.44%) | 5752320.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2594.61 V (376.03%) | 0.0 V | 4279.9 V (620.28%) | 3595200.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1729.74 V (250.69%) | 0.0 V | 2853.27 V (413.52%) | 2396800.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 1037.84 V (150.41%) | 0.0 V | 1711.96 V (248.11%) | 1438080.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 648.65 V (94.01%) | 41.3 V | 1069.97 V (155.07%) | 898800.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 415.14 V (60.16%) | 274.9 V | 684.78 V (99.24%) | 575232.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 296.53 V (42.97%) | 393.5 V | 489.13 V (70.89%) | 410880.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 207.57 V (30.08%) | 482.4 V | 342.39 V (49.62%) | 287616.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 148.26 V (21.49%) | 541.7 V | 244.57 V (35.44%) | 205440.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 109.25 V (15.83%) | 580.8 V | 180.21 V (26.12%) | 151376.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 86.49 V (12.53%) | 603.5 V | 142.66 V (20.68%) | 119840.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 69.19 V (10.03%) | 620.8 V | 114.13 V (16.54%) | 95872.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 56.1 V (8.13%) | 633.9 V | 92.54 V (13.41%) | 77734.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 43.24 V (6.27%) | 646.8 V | 71.33 V (10.34%) | 59920.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 34.59 V (5.01%) | 655.4 V | 57.07 V (8.27%) | 47936.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 25.95 V (3.76%) | 664.1 V | 42.8 V (6.2%) | 35952.0 W | Drop High |
FAQ — 800 Amp Cable Size at 350 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 800A at 350 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 350m at 690V (voltage drop: 12.97V or 1.88%).
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 · 350m (690V)16A · 350m (690V)20A · 350m (690V)25A · 350m (690V)32A · 350m (690V)40A · 350m (690V)50A · 350m (690V)63A · 350m (690V)80A · 350m (690V)100A · 350m (690V)125A · 350m (690V)160A · 350m (690V)200A · 350m (690V)