425 Amp Cable Size at 25 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 25 m (82.0 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.57V (2.37%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.88V (7.81%)
Voltage at Load23.4 VLine Loss: 241.6 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 25m
| 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 | 303.17 V (1263.19%) | 0.0 V | 500.08 V (2083.68%) | 128845.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 181.9 V (757.92%) | 0.0 V | 300.05 V (1250.21%) | 77307.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 113.69 V (473.7%) | 0.0 V | 187.53 V (781.38%) | 48317.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 75.79 V (315.8%) | 0.0 V | 125.02 V (520.92%) | 32211.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 45.47 V (189.48%) | 0.0 V | 75.01 V (312.55%) | 19326.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 28.42 V (118.42%) | 0.0 V | 46.88 V (195.35%) | 12079.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 18.19 V (75.79%) | 5.8 V | 30.0 V (125.02%) | 7730.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 12.99 V (54.14%) | 11.0 V | 21.43 V (89.3%) | 5522.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 9.09 V (37.9%) | 14.9 V | 15.0 V (62.51%) | 3865.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.5 V (27.07%) | 17.5 V | 10.72 V (44.65%) | 2761.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.79 V (19.95%) | 19.2 V | 7.9 V (32.9%) | 2034.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.79 V (15.79%) | 20.2 V | 6.25 V (26.05%) | 1610.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.03 V (12.63%) | 21.0 V | 5.0 V (20.84%) | 1288.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.46 V (10.24%) | 21.5 V | 4.05 V (16.89%) | 1044.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.89 V (7.89%) | 22.1 V | 3.13 V (13.02%) | 805.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.52 V (6.32%) | 22.5 V | 2.5 V (10.42%) | 644.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.14 V (4.74%) | 22.9 V | 1.88 V (7.81%) | 483.2 W | ~ ≤5% |
FAQ — 425 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 25 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 425A over 25m at 24V (voltage drop: 0.57V or 2.37%).
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 · 30m (24V)425A · 35m (24V)425A · 40m (24V)425A · 45m (24V)425A · 50m (24V)425A · 60m (24V)425A · 70m (24V)10A · 25m (24V)16A · 25m (24V)20A · 25m (24V)25A · 25m (24V)32A · 25m (24V)40A · 25m (24V)50A · 25m (24V)63A · 25m (24V)80A · 25m (24V)100A · 25m (24V)125A · 25m (24V)160A · 25m (24V)200A · 25m (24V)