425 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 425 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)16× 400 mm²Drop: 0.71V (2.96%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 18.75V (78.14%)
Voltage at Load23.3 VLine Loss: 302.0 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A 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 | 3031.67 V (12631.94%) | 0.0 V | 5000.83 V (20836.81%) | 1288458.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1819.0 V (7579.17%) | 0.0 V | 3000.5 V (12502.08%) | 773075.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1136.88 V (4736.98%) | 0.0 V | 1875.31 V (7813.8%) | 483171.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 757.92 V (3157.99%) | 0.0 V | 1250.21 V (5209.2%) | 322114.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 454.75 V (1894.79%) | 0.0 V | 750.12 V (3125.52%) | 193268.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 284.22 V (1184.24%) | 0.0 V | 468.83 V (1953.45%) | 120793.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 181.9 V (757.92%) | 0.0 V | 300.05 V (1250.21%) | 77307.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 129.93 V (541.37%) | 0.0 V | 214.32 V (893.01%) | 55219.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 90.95 V (378.96%) | 0.0 V | 150.03 V (625.1%) | 38653.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 64.96 V (270.68%) | 0.0 V | 107.16 V (446.5%) | 27609.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 47.87 V (199.45%) | 0.0 V | 78.96 V (329.0%) | 20344.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 37.9 V (157.9%) | 0.0 V | 62.51 V (260.46%) | 16105.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 30.32 V (126.32%) | 0.0 V | 50.01 V (208.37%) | 12884.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 24.58 V (102.42%) | 0.0 V | 40.55 V (168.95%) | 10447.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 18.95 V (78.95%) | 5.1 V | 31.26 V (130.23%) | 8052.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 15.16 V (63.16%) | 8.8 V | 25.0 V (104.18%) | 6442.3 W | Drop High |
| 400 mm² | 570 A | 445 A | 11.37 V (47.37%) | 12.6 V | 18.75 V (78.14%) | 4831.7 W | Drop High |
FAQ — 425 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16× 400 mm² copper cable for 425A over 250m at 24V (voltage drop: 0.71V or 2.96%).
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 · 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)