750 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 750 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 2.43V (0.35%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.02V (1.16%)
Voltage at Load687.6 VLine Loss: 3159.8 W
Max Power & Breaker896.34 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A 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 | 1297.31 V (188.02%) | 0.0 V | 2139.95 V (310.14%) | 1685250.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 778.38 V (112.81%) | 0.0 V | 1283.97 V (186.08%) | 1011150.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 486.49 V (70.51%) | 203.5 V | 802.48 V (116.3%) | 631968.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 324.33 V (47.0%) | 365.7 V | 534.99 V (77.53%) | 421312.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 194.6 V (28.2%) | 495.4 V | 320.99 V (46.52%) | 252787.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 121.62 V (17.63%) | 568.4 V | 200.62 V (29.08%) | 157992.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 77.84 V (11.28%) | 612.2 V | 128.4 V (18.61%) | 101115.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 72225.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 38.92 V (5.64%) | 651.1 V | 64.2 V (9.3%) | 50557.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 36112.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 20.48 V (2.97%) | 669.5 V | 33.79 V (4.9%) | 26609.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 16.22 V (2.35%) | 673.8 V | 26.75 V (3.88%) | 21065.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 16852.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 10.52 V (1.52%) | 679.5 V | 17.35 V (2.51%) | 13664.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.11 V (1.18%) | 681.9 V | 13.37 V (1.94%) | 10532.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.49 V (0.94%) | 683.5 V | 10.7 V (1.55%) | 8426.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 4.86 V (0.71%) | 685.1 V | 8.02 V (1.16%) | 6319.7 W | Drop High |
FAQ — 750 Amp Cable Size at 70 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 750A 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 750A over 70m at 690V (voltage drop: 2.43V or 0.35%).
What is the power capacity of 750A at 690V?
At unity power factor, 750A at 690V supports 896.34 kW with a standard 800A circuit breaker.
Related Lengths & Currents (690V)
750A · 5m (690V)750A · 10m (690V)750A · 15m (690V)750A · 20m (690V)750A · 25m (690V)750A · 30m (690V)750A · 35m (690V)750A · 40m (690V)750A · 45m (690V)750A · 50m (690V)750A · 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)