650 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 650 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)12× 400 mm²Drop: 0.7V (2.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 13.77V (57.36%)
Voltage at Load23.3 VLine Loss: 452.1 W
Max Power & Breaker15.6 kW700A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 650A 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 | 2225.6 V (9273.33%) | 0.0 V | 3671.2 V (15296.67%) | 1446640.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1335.36 V (5564.0%) | 0.0 V | 2202.72 V (9178.0%) | 867984.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 834.6 V (3477.5%) | 0.0 V | 1376.7 V (5736.25%) | 542490.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 556.4 V (2318.33%) | 0.0 V | 917.8 V (3824.17%) | 361660.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 333.84 V (1391.0%) | 0.0 V | 550.68 V (2294.5%) | 216996.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 208.65 V (869.38%) | 0.0 V | 344.17 V (1434.06%) | 135622.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 133.54 V (556.4%) | 0.0 V | 220.27 V (917.8%) | 86798.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 95.38 V (397.43%) | 0.0 V | 157.34 V (655.57%) | 61998.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 66.77 V (278.2%) | 0.0 V | 110.14 V (458.9%) | 43399.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 47.69 V (198.71%) | 0.0 V | 78.67 V (327.79%) | 30999.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 35.14 V (146.42%) | 0.0 V | 57.97 V (241.53%) | 22841.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 27.82 V (115.92%) | 0.0 V | 45.89 V (191.21%) | 18083.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 22.26 V (92.73%) | 1.7 V | 36.71 V (152.97%) | 14466.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 18.05 V (75.19%) | 6.0 V | 29.77 V (124.03%) | 11729.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 13.91 V (57.96%) | 10.1 V | 22.95 V (95.6%) | 9041.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 11.13 V (46.37%) | 12.9 V | 18.36 V (76.48%) | 7233.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 8.35 V (34.77%) | 15.7 V | 13.77 V (57.36%) | 5424.9 W | Drop High |
FAQ — 650 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 650A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 12× 400 mm² copper cable for 650A over 120m at 24V (voltage drop: 0.7V or 2.9%).
What is the power capacity of 650A at 24V?
At unity power factor, 650A at 24V supports 15.6 kW with a standard 700A circuit breaker.
Related Lengths & Currents (24V)
650A · 5m (24V)650A · 10m (24V)650A · 15m (24V)650A · 20m (24V)650A · 25m (24V)650A · 30m (24V)650A · 35m (24V)650A · 40m (24V)650A · 45m (24V)650A · 50m (24V)650A · 60m (24V)650A · 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)