250 Amp Cable Size at 500 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 250 A over 500 m (1640.4 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 19.31V (2.8%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 19.11V (2.77%)
Voltage at Load670.7 VLine Loss: 8359.4 W
Max Power & Breaker298.78 kW250A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 250A at 500m
| 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 | 3088.82 V (447.66%) | 0.0 V | 5095.12 V (738.42%) | 1337500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1853.29 V (268.59%) | 0.0 V | 3057.07 V (443.05%) | 802500.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1158.31 V (167.87%) | 0.0 V | 1910.67 V (276.91%) | 501562.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 772.21 V (111.91%) | 0.0 V | 1273.78 V (184.61%) | 334375.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 463.32 V (67.15%) | 226.7 V | 764.27 V (110.76%) | 200625.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 289.58 V (41.97%) | 400.4 V | 477.67 V (69.23%) | 125390.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 185.33 V (26.86%) | 504.7 V | 305.71 V (44.31%) | 80250.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 132.38 V (19.19%) | 557.6 V | 218.36 V (31.65%) | 57321.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 92.66 V (13.43%) | 597.3 V | 152.85 V (22.15%) | 40125.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 66.19 V (9.59%) | 623.8 V | 109.18 V (15.82%) | 28660.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 48.77 V (7.07%) | 641.2 V | 80.45 V (11.66%) | 21118.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 38.61 V (5.6%) | 651.4 V | 63.69 V (9.23%) | 16718.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 30.89 V (4.48%) | 659.1 V | 50.95 V (7.38%) | 13375.0 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 25.04 V (3.63%) | 665.0 V | 41.31 V (5.99%) | 10844.6 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 19.31 V (2.8%) | 670.7 V | 31.84 V (4.62%) | 8359.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 15.44 V (2.24%) | 674.6 V | 25.48 V (3.69%) | 6687.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 11.58 V (1.68%) | 678.4 V | 19.11 V (2.77%) | 5015.6 W | ✓ OK (≤3%) |
FAQ — 250 Amp Cable Size at 500 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 250A at 500 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 250A over 500m at 690V (voltage drop: 19.31V or 2.8%).
What is the power capacity of 250A at 690V?
At unity power factor, 250A at 690V supports 298.78 kW with a standard 250A circuit breaker.
Related Lengths & Currents (690V)
250A · 5m (690V)250A · 10m (690V)250A · 15m (690V)250A · 20m (690V)250A · 25m (690V)250A · 30m (690V)250A · 35m (690V)250A · 40m (690V)250A · 45m (690V)250A · 50m (690V)250A · 60m (690V)250A · 70m (690V)10A · 500m (690V)16A · 500m (690V)20A · 500m (690V)25A · 500m (690V)32A · 500m (690V)40A · 500m (690V)50A · 500m (690V)63A · 500m (690V)80A · 500m (690V)100A · 500m (690V)125A · 500m (690V)160A · 500m (690V)200A · 500m (690V)