750 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)40× 400 mm²Drop: 0.7V (2.93%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 46.33V (193.05%)
Voltage at Load23.3 VLine Loss: 526.6 W
Max Power & Breaker18.0 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 750A at 350m
| 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 | 7490.0 V (31208.33%) | 0.0 V | 12355.0 V (51479.17%) | 5617500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 4494.0 V (18725.0%) | 0.0 V | 7413.0 V (30887.5%) | 3370500.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2808.75 V (11703.12%) | 0.0 V | 4633.12 V (19304.69%) | 2106562.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 1872.5 V (7802.08%) | 0.0 V | 3088.75 V (12869.79%) | 1404375.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 1123.5 V (4681.25%) | 0.0 V | 1853.25 V (7721.87%) | 842625.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 702.19 V (2925.78%) | 0.0 V | 1158.28 V (4826.17%) | 526640.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 449.4 V (1872.5%) | 0.0 V | 741.3 V (3088.75%) | 337050.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 321.0 V (1337.5%) | 0.0 V | 529.5 V (2206.25%) | 240750.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 224.7 V (936.25%) | 0.0 V | 370.65 V (1544.38%) | 168525.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 160.5 V (668.75%) | 0.0 V | 264.75 V (1103.12%) | 120375.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 118.26 V (492.76%) | 0.0 V | 195.08 V (812.83%) | 88697.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 93.62 V (390.1%) | 0.0 V | 154.44 V (643.49%) | 70218.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 74.9 V (312.08%) | 0.0 V | 123.55 V (514.79%) | 56175.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 60.73 V (253.04%) | 0.0 V | 100.18 V (417.4%) | 45547.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 46.81 V (195.05%) | 0.0 V | 77.22 V (321.74%) | 35109.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 37.45 V (156.04%) | 0.0 V | 61.77 V (257.4%) | 28087.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 28.09 V (117.03%) | 0.0 V | 46.33 V (193.05%) | 21065.6 W | Drop High |
FAQ — 750 Amp Cable Size at 350 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 750A at 350 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 40× 400 mm² copper cable for 750A over 350m at 24V (voltage drop: 0.7V or 2.93%).
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 · 45m (24V)750A · 50m (24V)750A · 60m (24V)750A · 70m (24V)10A · 350m (24V)16A · 350m (24V)20A · 350m (24V)25A · 350m (24V)32A · 350m (24V)40A · 350m (24V)50A · 350m (24V)63A · 350m (24V)80A · 350m (24V)100A · 350m (24V)125A · 350m (24V)160A · 350m (24V)200A · 350m (24V)