750 Amp Cable Size at 25 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 750 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.87V (0.21%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.87V (0.69%)
Voltage at Load414.1 VLine Loss: 1128.5 W
Max Power & Breaker539.1 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 25m
| 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 | 463.32 V (111.64%) | 0.0 V | 764.27 V (184.16%) | 601875.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 277.99 V (66.99%) | 137.0 V | 458.56 V (110.5%) | 361125.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 173.75 V (41.87%) | 241.3 V | 286.6 V (69.06%) | 225703.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 115.83 V (27.91%) | 299.2 V | 191.07 V (46.04%) | 150468.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 69.5 V (16.75%) | 345.5 V | 114.64 V (27.62%) | 90281.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 43.44 V (10.47%) | 371.6 V | 71.65 V (17.27%) | 56425.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 27.8 V (6.7%) | 387.2 V | 45.86 V (11.05%) | 36112.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 19.86 V (4.78%) | 395.1 V | 32.75 V (7.89%) | 25794.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 13.9 V (3.35%) | 401.1 V | 22.93 V (5.52%) | 18056.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 9.93 V (2.39%) | 405.1 V | 16.38 V (3.95%) | 12897.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.32 V (1.76%) | 407.7 V | 12.07 V (2.91%) | 9503.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.79 V (1.4%) | 409.2 V | 9.55 V (2.3%) | 7523.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.63 V (1.12%) | 410.4 V | 7.64 V (1.84%) | 6018.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.76 V (0.91%) | 411.2 V | 6.2 V (1.49%) | 4880.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.9 V (0.7%) | 412.1 V | 4.78 V (1.15%) | 3761.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.32 V (0.56%) | 412.7 V | 3.82 V (0.92%) | 3009.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.74 V (0.42%) | 413.3 V | 2.87 V (0.69%) | 2257.0 W | Drop High |
FAQ — 750 Amp Cable Size at 25 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 750A at 25 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 750A over 25m at 415V (voltage drop: 0.87V or 0.21%).
What is the power capacity of 750A at 415V?
At unity power factor, 750A at 415V supports 539.1 kW with a standard 800A circuit breaker.
Related Lengths & Currents (415V)
750A · 5m (415V)750A · 10m (415V)750A · 15m (415V)750A · 20m (415V)750A · 30m (415V)750A · 35m (415V)750A · 40m (415V)750A · 45m (415V)750A · 50m (415V)750A · 60m (415V)750A · 70m (415V)10A · 25m (415V)16A · 25m (415V)20A · 25m (415V)25A · 25m (415V)32A · 25m (415V)40A · 25m (415V)50A · 25m (415V)63A · 25m (415V)80A · 25m (415V)100A · 25m (415V)125A · 25m (415V)160A · 25m (415V)200A · 25m (415V)