425 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)5× 400 mm²Drop: 0.64V (2.65%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.25V (21.88%)
Voltage at Load23.4 VLine Loss: 270.6 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 70m
| 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 | 848.87 V (3536.94%) | 0.0 V | 1400.23 V (5834.31%) | 360768.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 509.32 V (2122.17%) | 0.0 V | 840.14 V (3500.58%) | 216461.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 318.32 V (1326.35%) | 0.0 V | 525.09 V (2187.86%) | 135288.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 212.22 V (884.24%) | 0.0 V | 350.06 V (1458.58%) | 90192.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 127.33 V (530.54%) | 0.0 V | 210.04 V (875.15%) | 54115.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 79.58 V (331.59%) | 0.0 V | 131.27 V (546.97%) | 33822.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 50.93 V (212.22%) | 0.0 V | 84.01 V (350.06%) | 21646.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 36.38 V (151.58%) | 0.0 V | 60.01 V (250.04%) | 15461.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 25.47 V (106.11%) | 0.0 V | 42.01 V (175.03%) | 10823.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 18.19 V (75.79%) | 5.8 V | 30.0 V (125.02%) | 7730.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 13.4 V (55.85%) | 10.6 V | 22.11 V (92.12%) | 5696.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 10.61 V (44.21%) | 13.4 V | 17.5 V (72.93%) | 4509.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 8.49 V (35.37%) | 15.5 V | 14.0 V (58.34%) | 3607.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.88 V (28.68%) | 17.1 V | 11.35 V (47.31%) | 2925.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.31 V (22.11%) | 18.7 V | 8.75 V (36.46%) | 2254.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.24 V (17.68%) | 19.8 V | 7.0 V (29.17%) | 1803.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.18 V (13.26%) | 20.8 V | 5.25 V (21.88%) | 1352.9 W | Drop High |
FAQ — 425 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 5× 400 mm² copper cable for 425A over 70m at 24V (voltage drop: 0.64V or 2.65%).
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)10A · 70m (24V)16A · 70m (24V)20A · 70m (24V)25A · 70m (24V)32A · 70m (24V)40A · 70m (24V)50A · 70m (24V)63A · 70m (24V)80A · 70m (24V)100A · 70m (24V)125A · 70m (24V)160A · 70m (24V)200A · 70m (24V)