750 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)6× 400 mm²Drop: 0.6V (2.51%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.96V (24.82%)
Voltage at Load23.4 VLine Loss: 451.4 W
Max Power & Breaker18.0 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 45m
| 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 | 963.0 V (4012.5%) | 0.0 V | 1588.5 V (6618.75%) | 722250.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 577.8 V (2407.5%) | 0.0 V | 953.1 V (3971.25%) | 433350.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 361.12 V (1504.69%) | 0.0 V | 595.69 V (2482.03%) | 270843.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 240.75 V (1003.12%) | 0.0 V | 397.12 V (1654.69%) | 180562.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 144.45 V (601.88%) | 0.0 V | 238.27 V (992.81%) | 108337.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 90.28 V (376.17%) | 0.0 V | 148.92 V (620.51%) | 67710.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 57.78 V (240.75%) | 0.0 V | 95.31 V (397.12%) | 43335.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 41.27 V (171.96%) | 0.0 V | 68.08 V (283.66%) | 30953.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.89 V (120.38%) | 0.0 V | 47.65 V (198.56%) | 21667.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.64 V (85.98%) | 3.4 V | 34.04 V (141.83%) | 15476.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.21 V (63.36%) | 8.8 V | 25.08 V (104.51%) | 11403.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.04 V (50.16%) | 12.0 V | 19.86 V (82.73%) | 9028.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.63 V (40.12%) | 14.4 V | 15.88 V (66.19%) | 7222.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.81 V (32.53%) | 16.2 V | 12.88 V (53.67%) | 5856.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 6.02 V (25.08%) | 18.0 V | 9.93 V (41.37%) | 4514.1 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.81 V (20.06%) | 19.2 V | 7.94 V (33.09%) | 3611.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.61 V (15.05%) | 20.4 V | 5.96 V (24.82%) | 2708.4 W | Drop High |
FAQ — 750 Amp Cable Size at 45 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 750A at 45 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 6× 400 mm² copper cable for 750A over 45m at 24V (voltage drop: 0.6V or 2.51%).
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 · 25m (24V)750A · 30m (24V)750A · 35m (24V)750A · 40m (24V)750A · 50m (24V)750A · 60m (24V)750A · 70m (24V)10A · 45m (24V)16A · 45m (24V)20A · 45m (24V)25A · 45m (24V)32A · 45m (24V)40A · 45m (24V)50A · 45m (24V)63A · 45m (24V)80A · 45m (24V)100A · 45m (24V)125A · 45m (24V)160A · 45m (24V)200A · 45m (24V)