375 Amp Cable Size at 40 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 40 m (131.2 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 0.53V (2.23%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.65V (11.03%)
Voltage at Load23.5 VLine Loss: 200.6 W
Max Power & Breaker9.0 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 375A at 40m
| 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 | 428.0 V (1783.33%) | 0.0 V | 706.0 V (2941.67%) | 160500.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 256.8 V (1070.0%) | 0.0 V | 423.6 V (1765.0%) | 96300.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 160.5 V (668.75%) | 0.0 V | 264.75 V (1103.12%) | 60187.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 107.0 V (445.83%) | 0.0 V | 176.5 V (735.42%) | 40125.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 64.2 V (267.5%) | 0.0 V | 105.9 V (441.25%) | 24075.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 40.12 V (167.19%) | 0.0 V | 66.19 V (275.78%) | 15046.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 25.68 V (107.0%) | 0.0 V | 42.36 V (176.5%) | 9630.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 18.34 V (76.43%) | 5.7 V | 30.26 V (126.07%) | 6878.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 12.84 V (53.5%) | 11.2 V | 21.18 V (88.25%) | 4815.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 9.17 V (38.21%) | 14.8 V | 15.13 V (63.04%) | 3439.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 6.76 V (28.16%) | 17.2 V | 11.15 V (46.45%) | 2534.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.35 V (22.29%) | 18.6 V | 8.82 V (36.77%) | 2006.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.28 V (17.83%) | 19.7 V | 7.06 V (29.42%) | 1605.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.47 V (14.46%) | 20.5 V | 5.72 V (23.85%) | 1301.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.68 V (11.15%) | 21.3 V | 4.41 V (18.39%) | 1003.1 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 802.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.6 V (6.69%) | 22.4 V | 2.65 V (11.03%) | 601.9 W | Drop High |
FAQ — 375 Amp Cable Size at 40 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 375A at 40 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 375A over 40m at 24V (voltage drop: 0.53V or 2.23%).
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 · 45m (24V)375A · 50m (24V)375A · 60m (24V)375A · 70m (24V)10A · 40m (24V)16A · 40m (24V)20A · 40m (24V)25A · 40m (24V)32A · 40m (24V)40A · 40m (24V)50A · 40m (24V)63A · 40m (24V)80A · 40m (24V)100A · 40m (24V)125A · 40m (24V)160A · 40m (24V)200A · 40m (24V)