750 Amp Cable Size at 300 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 300 m (984.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 10.43V (1.51%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 34.39V (4.98%)
Voltage at Load679.6 VLine Loss: 13542.2 W
Max Power & Breaker896.34 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 300m
| 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 | 5559.88 V (805.78%) | 0.0 V | 9171.21 V (1329.16%) | 7222500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 3335.93 V (483.47%) | 0.0 V | 5502.73 V (797.5%) | 4333500.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2084.96 V (302.17%) | 0.0 V | 3439.2 V (498.44%) | 2708437.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 1389.97 V (201.45%) | 0.0 V | 2292.8 V (332.29%) | 1805625.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 833.98 V (120.87%) | 0.0 V | 1375.68 V (199.37%) | 1083375.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 521.24 V (75.54%) | 168.8 V | 859.8 V (124.61%) | 677109.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 333.59 V (48.35%) | 356.4 V | 550.27 V (79.75%) | 433350.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 238.28 V (34.53%) | 451.7 V | 393.05 V (56.96%) | 309535.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 166.8 V (24.17%) | 523.2 V | 275.14 V (39.87%) | 216675.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 119.14 V (17.27%) | 570.9 V | 196.53 V (28.48%) | 154767.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 87.79 V (12.72%) | 602.2 V | 144.81 V (20.99%) | 114039.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 69.5 V (10.07%) | 620.5 V | 114.64 V (16.61%) | 90281.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 72225.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 45.08 V (6.53%) | 644.9 V | 74.36 V (10.78%) | 58560.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 34.75 V (5.04%) | 655.3 V | 57.32 V (8.31%) | 45140.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 36112.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 20.85 V (3.02%) | 669.2 V | 34.39 V (4.98%) | 27084.4 W | Drop High |
FAQ — 750 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 750A at 300 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 300m at 690V (voltage drop: 10.43V or 1.51%).
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 · 300m (690V)16A · 300m (690V)20A · 300m (690V)25A · 300m (690V)32A · 300m (690V)40A · 300m (690V)50A · 300m (690V)63A · 300m (690V)80A · 300m (690V)100A · 300m (690V)125A · 300m (690V)160A · 300m (690V)200A · 300m (690V)