750 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
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)3× 400 mm²Drop: 0.67V (2.79%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.31V (13.79%)
Voltage at Load23.3 VLine Loss: 501.6 W
Max Power & Breaker18.0 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 | 535.0 V (2229.17%) | 0.0 V | 882.5 V (3677.08%) | 401250.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 321.0 V (1337.5%) | 0.0 V | 529.5 V (2206.25%) | 240750.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 200.62 V (835.94%) | 0.0 V | 330.94 V (1378.91%) | 150468.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 133.75 V (557.29%) | 0.0 V | 220.62 V (919.27%) | 100312.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 80.25 V (334.37%) | 0.0 V | 132.38 V (551.56%) | 60187.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 50.16 V (208.98%) | 0.0 V | 82.73 V (344.73%) | 37617.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 32.1 V (133.75%) | 0.0 V | 52.95 V (220.62%) | 24075.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 22.93 V (95.54%) | 1.1 V | 37.82 V (157.59%) | 17196.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 16.05 V (66.87%) | 8.0 V | 26.47 V (110.31%) | 12037.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 11.46 V (47.77%) | 12.5 V | 18.91 V (78.79%) | 8598.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 8.45 V (35.2%) | 15.6 V | 13.93 V (58.06%) | 6335.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.69 V (27.86%) | 17.3 V | 11.03 V (45.96%) | 5015.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.35 V (22.29%) | 18.6 V | 8.82 V (36.77%) | 4012.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.34 V (18.07%) | 19.7 V | 7.16 V (29.81%) | 3253.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.34 V (13.93%) | 20.7 V | 5.52 V (22.98%) | 2507.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.67 V (11.15%) | 21.3 V | 4.41 V (18.39%) | 2006.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.01 V (8.36%) | 22.0 V | 3.31 V (13.79%) | 1504.7 W | Drop High |
FAQ — 750 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 750A at 25 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 750A over 25m at 24V (voltage drop: 0.67V or 2.79%).
What is the power capacity of 750A at 24V?
At unity power factor, 750A at 24V supports 18.0 kW with a standard 800A circuit breaker.
Related Lengths & Currents (24V)
750A · 5m (24V)750A · 10m (24V)750A · 15m (24V)750A · 20m (24V)750A · 30m (24V)750A · 35m (24V)750A · 40m (24V)750A · 45m (24V)750A · 50m (24V)750A · 60m (24V)750A · 70m (24V)10A · 25m (24V)16A · 25m (24V)20A · 25m (24V)25A · 25m (24V)32A · 25m (24V)40A · 25m (24V)50A · 25m (24V)63A · 25m (24V)80A · 25m (24V)100A · 25m (24V)125A · 25m (24V)160A · 25m (24V)200A · 25m (24V)