425 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 425 A over 40 m (131.2 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 0.61V (2.53%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.0V (12.5%)
Voltage at Load23.4 VLine Loss: 257.7 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A 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 | 485.07 V (2021.11%) | 0.0 V | 800.13 V (3333.89%) | 206153.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 291.04 V (1212.67%) | 0.0 V | 480.08 V (2000.33%) | 123692.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 181.9 V (757.92%) | 0.0 V | 300.05 V (1250.21%) | 77307.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 121.27 V (505.28%) | 0.0 V | 200.03 V (833.47%) | 51538.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 72.76 V (303.17%) | 0.0 V | 120.02 V (500.08%) | 30923.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 45.48 V (189.48%) | 0.0 V | 75.01 V (312.55%) | 19326.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 29.1 V (121.27%) | 0.0 V | 48.01 V (200.03%) | 12369.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 20.79 V (86.62%) | 3.2 V | 34.29 V (142.88%) | 8835.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 14.55 V (60.63%) | 9.4 V | 24.0 V (100.02%) | 6184.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.39 V (43.31%) | 13.6 V | 17.15 V (71.44%) | 4417.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.66 V (31.91%) | 16.3 V | 12.63 V (52.64%) | 3255.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.06 V (25.26%) | 17.9 V | 10.0 V (41.67%) | 2576.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.85 V (20.21%) | 19.1 V | 8.0 V (33.34%) | 2061.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.93 V (16.39%) | 20.1 V | 6.49 V (27.03%) | 1671.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.03 V (12.63%) | 21.0 V | 5.0 V (20.84%) | 1288.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.43 V (10.11%) | 21.6 V | 4.0 V (16.67%) | 1030.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.82 V (7.58%) | 22.2 V | 3.0 V (12.5%) | 773.1 W | Drop High |
FAQ — 425 Amp Cable Size at 40 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A 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 425A over 40m at 24V (voltage drop: 0.61V or 2.53%).
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 · 45m (24V)425A · 50m (24V)425A · 60m (24V)425A · 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)