700 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 700 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 8.11V (1.18%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 26.75V (3.88%)
Voltage at Load681.9 VLine Loss: 9830.6 W
Max Power & Breaker836.58 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A 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 | 4324.35 V (626.72%) | 0.0 V | 7133.16 V (1033.79%) | 5243000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2594.61 V (376.03%) | 0.0 V | 4279.9 V (620.28%) | 3145800.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1621.63 V (235.02%) | 0.0 V | 2674.94 V (387.67%) | 1966125.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1081.09 V (156.68%) | 0.0 V | 1783.29 V (258.45%) | 1310750.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 648.65 V (94.01%) | 41.3 V | 1069.97 V (155.07%) | 786450.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 405.41 V (58.75%) | 284.6 V | 668.73 V (96.92%) | 491531.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 259.46 V (37.6%) | 430.5 V | 427.99 V (62.03%) | 314580.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 185.33 V (26.86%) | 504.7 V | 305.71 V (44.31%) | 224700.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 129.73 V (18.8%) | 560.3 V | 213.99 V (31.01%) | 157290.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 92.66 V (13.43%) | 597.3 V | 152.85 V (22.15%) | 112350.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 68.28 V (9.9%) | 621.7 V | 112.63 V (16.32%) | 82784.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 54.05 V (7.83%) | 635.9 V | 89.16 V (12.92%) | 65537.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 43.24 V (6.27%) | 646.8 V | 71.33 V (10.34%) | 52430.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 35.06 V (5.08%) | 654.9 V | 57.84 V (8.38%) | 42510.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 27.03 V (3.92%) | 663.0 V | 44.58 V (6.46%) | 32768.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 21.62 V (3.13%) | 668.4 V | 35.67 V (5.17%) | 26215.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 16.22 V (2.35%) | 673.8 V | 26.75 V (3.88%) | 19661.2 W | Drop High |
FAQ — 700 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 700A 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 700A over 250m at 690V (voltage drop: 8.11V or 1.18%).
What is the power capacity of 700A at 690V?
At unity power factor, 700A at 690V supports 836.58 kW with a standard 700A circuit breaker.
Related Lengths & Currents (690V)
700A · 5m (690V)700A · 10m (690V)700A · 15m (690V)700A · 20m (690V)700A · 25m (690V)700A · 30m (690V)700A · 35m (690V)700A · 40m (690V)700A · 45m (690V)700A · 50m (690V)700A · 60m (690V)700A · 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)