425 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)8× 400 mm²Drop: 0.68V (2.84%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 9.0V (37.51%)
Voltage at Load23.3 VLine Loss: 289.9 W
Max Power & Breaker10.2 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 120m
| 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 | 1455.2 V (6063.33%) | 0.0 V | 2400.4 V (10001.67%) | 618460.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 873.12 V (3638.0%) | 0.0 V | 1440.24 V (6001.0%) | 371076.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 545.7 V (2273.75%) | 0.0 V | 900.15 V (3750.62%) | 231922.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 363.8 V (1515.83%) | 0.0 V | 600.1 V (2500.42%) | 154615.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 218.28 V (909.5%) | 0.0 V | 360.06 V (1500.25%) | 92769.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 136.43 V (568.44%) | 0.0 V | 225.04 V (937.66%) | 57980.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 87.31 V (363.8%) | 0.0 V | 144.02 V (600.1%) | 37107.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 62.37 V (259.86%) | 0.0 V | 102.87 V (428.64%) | 26505.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 43.66 V (181.9%) | 0.0 V | 72.01 V (300.05%) | 18553.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 31.18 V (129.93%) | 0.0 V | 51.44 V (214.32%) | 13252.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 22.98 V (95.74%) | 1.0 V | 37.9 V (157.92%) | 9765.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 18.19 V (75.79%) | 5.8 V | 30.0 V (125.02%) | 7730.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 14.55 V (60.63%) | 9.4 V | 24.0 V (100.02%) | 6184.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 11.8 V (49.16%) | 12.2 V | 19.46 V (81.09%) | 5014.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 9.09 V (37.9%) | 14.9 V | 15.0 V (62.51%) | 3865.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 7.28 V (30.32%) | 16.7 V | 12.0 V (50.01%) | 3092.3 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.46 V (22.74%) | 18.5 V | 9.0 V (37.51%) | 2319.2 W | Drop High |
FAQ — 425 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 425A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 8× 400 mm² copper cable for 425A over 120m at 24V (voltage drop: 0.68V or 2.84%).
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 · 120m (24V)16A · 120m (24V)20A · 120m (24V)25A · 120m (24V)32A · 120m (24V)40A · 120m (24V)50A · 120m (24V)63A · 120m (24V)80A · 120m (24V)100A · 120m (24V)125A · 120m (24V)160A · 120m (24V)200A · 120m (24V)