700 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 2.27V (0.33%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 7.49V (1.09%)
Voltage at Load687.7 VLine Loss: 2752.6 W
Max Power & Breaker836.58 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 700A at 70m
| 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 | 1210.82 V (175.48%) | 0.0 V | 1997.29 V (289.46%) | 1468040.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 726.49 V (105.29%) | 0.0 V | 1198.37 V (173.68%) | 880824.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 454.06 V (65.81%) | 235.9 V | 748.98 V (108.55%) | 550515.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 302.7 V (43.87%) | 387.3 V | 499.32 V (72.37%) | 367010.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 181.62 V (26.32%) | 508.4 V | 299.59 V (43.42%) | 220206.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 113.51 V (16.45%) | 576.5 V | 187.25 V (27.14%) | 137628.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 72.65 V (10.53%) | 617.4 V | 119.84 V (17.37%) | 88082.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 51.89 V (7.52%) | 638.1 V | 85.6 V (12.41%) | 62916.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 36.32 V (5.26%) | 653.7 V | 59.92 V (8.68%) | 44041.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 25.95 V (3.76%) | 664.1 V | 42.8 V (6.2%) | 31458.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 19.12 V (2.77%) | 670.9 V | 31.54 V (4.57%) | 23179.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 15.14 V (2.19%) | 674.9 V | 24.97 V (3.62%) | 18350.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 12.11 V (1.75%) | 677.9 V | 19.97 V (2.89%) | 14680.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 9.82 V (1.42%) | 680.2 V | 16.19 V (2.35%) | 11903.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 7.57 V (1.1%) | 682.4 V | 12.48 V (1.81%) | 9175.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.05 V (0.88%) | 683.9 V | 9.99 V (1.45%) | 7340.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 4.54 V (0.66%) | 685.5 V | 7.49 V (1.09%) | 5505.2 W | Drop High |
FAQ — 700 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 700A at 70 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 70m at 690V (voltage drop: 2.27V or 0.33%).
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)10A · 70m (690V)16A · 70m (690V)20A · 70m (690V)25A · 70m (690V)32A · 70m (690V)40A · 70m (690V)50A · 70m (690V)63A · 70m (690V)80A · 70m (690V)100A · 70m (690V)125A · 70m (690V)160A · 70m (690V)200A · 70m (690V)