425 Amp Cable Size at 400 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 425 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)26× 400 mm²Drop: 0.7V (2.92%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 30.0V (125.02%)
Voltage at Load23.3 VLine Loss: 297.3 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 400m
| 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 | 4850.67 V (20211.11%) | 0.0 V | 8001.33 V (33338.89%) | 2061533.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2910.4 V (12126.67%) | 0.0 V | 4800.8 V (20003.33%) | 1236920.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1819.0 V (7579.17%) | 0.0 V | 3000.5 V (12502.08%) | 773075.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1212.67 V (5052.78%) | 0.0 V | 2000.33 V (8334.72%) | 515383.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 727.6 V (3031.67%) | 0.0 V | 1200.2 V (5000.83%) | 309230.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 454.75 V (1894.79%) | 0.0 V | 750.12 V (3125.52%) | 193268.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 291.04 V (1212.67%) | 0.0 V | 480.08 V (2000.33%) | 123692.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 207.89 V (866.19%) | 0.0 V | 342.91 V (1428.81%) | 88351.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 145.52 V (606.33%) | 0.0 V | 240.04 V (1000.17%) | 61846.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 103.94 V (433.1%) | 0.0 V | 171.46 V (714.4%) | 44175.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 76.59 V (319.12%) | 0.0 V | 126.34 V (526.4%) | 32550.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 60.63 V (252.64%) | 0.0 V | 100.02 V (416.74%) | 25769.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 48.51 V (202.11%) | 0.0 V | 80.01 V (333.39%) | 20615.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 39.33 V (163.87%) | 0.0 V | 64.88 V (270.32%) | 16715.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 30.32 V (126.32%) | 0.0 V | 50.01 V (208.37%) | 12884.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 24.25 V (101.06%) | 0.0 V | 40.01 V (166.69%) | 10307.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 18.19 V (75.79%) | 5.8 V | 30.0 V (125.02%) | 7730.7 W | Drop High |
FAQ — 425 Amp Cable Size at 400 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 400 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 26× 400 mm² copper cable for 425A over 400m at 24V (voltage drop: 0.7V or 2.92%).
What is the power capacity of 425A at 24V?
At unity power factor, 425A at 24V supports 10.2 kW with a standard 450A circuit breaker.
Related Lengths & Currents (24V)
425A · 5m (24V)425A · 10m (24V)425A · 15m (24V)425A · 20m (24V)425A · 25m (24V)425A · 30m (24V)425A · 35m (24V)425A · 40m (24V)425A · 45m (24V)425A · 50m (24V)425A · 60m (24V)425A · 70m (24V)10A · 400m (24V)16A · 400m (24V)20A · 400m (24V)25A · 400m (24V)32A · 400m (24V)40A · 400m (24V)50A · 400m (24V)63A · 400m (24V)80A · 400m (24V)100A · 400m (24V)125A · 400m (24V)160A · 400m (24V)200A · 400m (24V)