750 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 4.17V (0.6%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 13.76V (1.99%)
Voltage at Load685.8 VLine Loss: 5416.9 W
Max Power & Breaker896.34 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 120m
| 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 | 2223.95 V (322.31%) | 0.0 V | 3668.48 V (531.66%) | 2889000.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1334.37 V (193.39%) | 0.0 V | 2201.09 V (319.0%) | 1733400.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 833.98 V (120.87%) | 0.0 V | 1375.68 V (199.37%) | 1083375.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 555.99 V (80.58%) | 134.0 V | 917.12 V (132.92%) | 722250.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 333.59 V (48.35%) | 356.4 V | 550.27 V (79.75%) | 433350.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 208.5 V (30.22%) | 481.5 V | 343.92 V (49.84%) | 270843.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 133.44 V (19.34%) | 556.6 V | 220.11 V (31.9%) | 173340.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 95.31 V (13.81%) | 594.7 V | 157.22 V (22.79%) | 123814.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 66.72 V (9.67%) | 623.3 V | 110.05 V (15.95%) | 86670.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 47.66 V (6.91%) | 642.3 V | 78.61 V (11.39%) | 61907.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 35.12 V (5.09%) | 654.9 V | 57.92 V (8.39%) | 45615.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 36112.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 28890.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 18.03 V (2.61%) | 672.0 V | 29.74 V (4.31%) | 23424.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 18056.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 11.12 V (1.61%) | 678.9 V | 18.34 V (2.66%) | 14445.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 10833.8 W | Drop High |
FAQ — 750 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 750A at 120 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 120m at 690V (voltage drop: 4.17V or 0.6%).
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 · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)80A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)