375 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 375 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)14× 400 mm²Drop: 0.72V (2.99%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 16.55V (68.95%)
Voltage at Load23.3 VLine Loss: 268.7 W
Max Power & Breaker9.0 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 375A at 250m
| 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 | 2675.0 V (11145.83%) | 0.0 V | 4412.5 V (18385.42%) | 1003125.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1605.0 V (6687.5%) | 0.0 V | 2647.5 V (11031.25%) | 601875.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1003.12 V (4179.69%) | 0.0 V | 1654.69 V (6894.53%) | 376171.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 668.75 V (2786.46%) | 0.0 V | 1103.12 V (4596.35%) | 250781.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 401.25 V (1671.87%) | 0.0 V | 661.88 V (2757.81%) | 150468.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 250.78 V (1044.92%) | 0.0 V | 413.67 V (1723.63%) | 94043.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 160.5 V (668.75%) | 0.0 V | 264.75 V (1103.12%) | 60187.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 114.64 V (477.68%) | 0.0 V | 189.11 V (787.95%) | 42991.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 80.25 V (334.38%) | 0.0 V | 132.38 V (551.56%) | 30093.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 57.32 V (238.84%) | 0.0 V | 94.55 V (393.97%) | 21495.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 42.24 V (175.99%) | 0.0 V | 69.67 V (290.3%) | 15838.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 33.44 V (139.32%) | 0.0 V | 55.16 V (229.82%) | 12539.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 26.75 V (111.46%) | 0.0 V | 44.12 V (183.85%) | 10031.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 21.69 V (90.37%) | 2.3 V | 35.78 V (149.07%) | 8133.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 16.72 V (69.66%) | 7.3 V | 27.58 V (114.91%) | 6269.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 13.38 V (55.73%) | 10.6 V | 22.06 V (91.93%) | 5015.6 W | Drop High |
| 400 mm² | 570 A | 445 A | 10.03 V (41.8%) | 14.0 V | 16.55 V (68.95%) | 3761.7 W | Drop High |
FAQ — 375 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 375A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 14× 400 mm² copper cable for 375A over 250m at 24V (voltage drop: 0.72V or 2.99%).
What is the power capacity of 375A at 24V?
At unity power factor, 375A at 24V supports 9.0 kW with a standard 400A circuit breaker.
Related Lengths & Currents (24V)
375A · 5m (24V)375A · 10m (24V)375A · 15m (24V)375A · 20m (24V)375A · 25m (24V)375A · 30m (24V)375A · 35m (24V)375A · 40m (24V)375A · 45m (24V)375A · 50m (24V)375A · 60m (24V)375A · 70m (24V)10A · 250m (24V)16A · 250m (24V)20A · 250m (24V)25A · 250m (24V)32A · 250m (24V)40A · 250m (24V)50A · 250m (24V)63A · 250m (24V)80A · 250m (24V)100A · 250m (24V)125A · 250m (24V)160A · 250m (24V)200A · 250m (24V)