750 Amp Cable Size at 90 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 90 m (295.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 3.12V (0.46%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 10.32V (1.5%)
Voltage at Load686.9 VLine Loss: 4062.7 W
Max Power & Breaker896.34 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 90m
| 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 | 1667.96 V (241.73%) | 0.0 V | 2751.36 V (398.75%) | 2166750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1000.78 V (145.04%) | 0.0 V | 1650.82 V (239.25%) | 1300050.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 625.49 V (90.65%) | 64.5 V | 1031.76 V (149.53%) | 812531.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 416.99 V (60.43%) | 273.0 V | 687.84 V (99.69%) | 541687.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 250.19 V (36.26%) | 439.8 V | 412.7 V (59.81%) | 325012.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 156.37 V (22.66%) | 533.6 V | 257.94 V (37.38%) | 203132.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 100.08 V (14.5%) | 589.9 V | 165.08 V (23.92%) | 130005.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 71.48 V (10.36%) | 618.5 V | 117.92 V (17.09%) | 92860.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 50.04 V (7.25%) | 640.0 V | 82.54 V (11.96%) | 65002.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 35.74 V (5.18%) | 654.3 V | 58.96 V (8.54%) | 46430.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 26.34 V (3.82%) | 663.7 V | 43.44 V (6.3%) | 34211.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 20.85 V (3.02%) | 669.2 V | 34.39 V (4.98%) | 27084.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 21667.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 13.52 V (1.96%) | 676.5 V | 22.31 V (3.23%) | 17568.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 10.42 V (1.51%) | 679.6 V | 17.2 V (2.49%) | 13542.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 10833.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 6.25 V (0.91%) | 683.7 V | 10.32 V (1.5%) | 8125.3 W | Drop High |
FAQ — 750 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 750A at 90 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 90m at 690V (voltage drop: 3.12V or 0.46%).
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)750A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)