650 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 650 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 7.53V (1.09%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 24.84V (3.6%)
Voltage at Load682.5 VLine Loss: 8476.4 W
Max Power & Breaker776.82 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 650A at 250m
| 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 | 4015.47 V (581.95%) | 0.0 V | 6623.65 V (959.95%) | 4520750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2409.28 V (349.17%) | 0.0 V | 3974.19 V (575.97%) | 2712450.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1505.8 V (218.23%) | 0.0 V | 2483.87 V (359.98%) | 1695281.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 1003.87 V (145.49%) | 0.0 V | 1655.91 V (239.99%) | 1130187.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 602.32 V (87.29%) | 87.7 V | 993.55 V (143.99%) | 678112.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 376.45 V (54.56%) | 313.5 V | 620.97 V (90.0%) | 423820.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 240.93 V (34.92%) | 449.1 V | 397.42 V (57.6%) | 271245.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 172.09 V (24.94%) | 517.9 V | 283.87 V (41.14%) | 193746.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 120.46 V (17.46%) | 569.5 V | 198.71 V (28.8%) | 135622.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 86.05 V (12.47%) | 604.0 V | 141.94 V (20.57%) | 96873.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 63.4 V (9.19%) | 626.6 V | 104.58 V (15.16%) | 71380.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 50.19 V (7.27%) | 639.8 V | 82.8 V (12.0%) | 56509.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 40.15 V (5.82%) | 649.8 V | 66.24 V (9.6%) | 45207.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 32.56 V (4.72%) | 657.4 V | 53.71 V (7.78%) | 36654.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 25.1 V (3.64%) | 664.9 V | 41.4 V (6.0%) | 28254.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 20.08 V (2.91%) | 669.9 V | 33.12 V (4.8%) | 22603.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 15.06 V (2.18%) | 674.9 V | 24.84 V (3.6%) | 16952.8 W | Drop High |
FAQ — 650 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 650A at 250 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 650A over 250m at 690V (voltage drop: 7.53V or 1.09%).
What is the power capacity of 650A at 690V?
At unity power factor, 650A at 690V supports 776.82 kW with a standard 700A circuit breaker.
Related Lengths & Currents (690V)
650A · 5m (690V)650A · 10m (690V)650A · 15m (690V)650A · 20m (690V)650A · 25m (690V)650A · 30m (690V)650A · 35m (690V)650A · 40m (690V)650A · 45m (690V)650A · 50m (690V)650A · 60m (690V)650A · 70m (690V)10A · 250m (690V)16A · 250m (690V)20A · 250m (690V)25A · 250m (690V)32A · 250m (690V)40A · 250m (690V)50A · 250m (690V)63A · 250m (690V)80A · 250m (690V)100A · 250m (690V)125A · 250m (690V)160A · 250m (690V)200A · 250m (690V)