350 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 350 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)7× 400 mm²Drop: 0.64V (2.68%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 7.41V (30.89%)
Voltage at Load23.4 VLine Loss: 224.7 W
Max Power & Breaker8.4 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A 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 | 1198.4 V (4993.33%) | 0.0 V | 1976.8 V (8236.67%) | 419440.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 719.04 V (2996.0%) | 0.0 V | 1186.08 V (4942.0%) | 251664.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 449.4 V (1872.5%) | 0.0 V | 741.3 V (3088.75%) | 157290.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 299.6 V (1248.33%) | 0.0 V | 494.2 V (2059.17%) | 104860.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 179.76 V (749.0%) | 0.0 V | 296.52 V (1235.5%) | 62916.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 112.35 V (468.13%) | 0.0 V | 185.32 V (772.19%) | 39322.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 71.9 V (299.6%) | 0.0 V | 118.61 V (494.2%) | 25166.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 51.36 V (214.0%) | 0.0 V | 84.72 V (353.0%) | 17976.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 35.95 V (149.8%) | 0.0 V | 59.3 V (247.1%) | 12583.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 25.68 V (107.0%) | 0.0 V | 42.36 V (176.5%) | 8988.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 18.92 V (78.84%) | 5.1 V | 31.21 V (130.05%) | 6622.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 14.98 V (62.42%) | 9.0 V | 24.71 V (102.96%) | 5243.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 11.98 V (49.93%) | 12.0 V | 19.77 V (82.37%) | 4194.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 9.72 V (40.49%) | 14.3 V | 16.03 V (66.78%) | 3400.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 7.49 V (31.21%) | 16.5 V | 12.35 V (51.48%) | 2621.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 5.99 V (24.97%) | 18.0 V | 9.88 V (41.18%) | 2097.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 4.49 V (18.73%) | 19.5 V | 7.41 V (30.89%) | 1572.9 W | Drop High |
FAQ — 350 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 350A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 7× 400 mm² copper cable for 350A over 120m at 24V (voltage drop: 0.64V or 2.68%).
What is the power capacity of 350A at 24V?
At unity power factor, 350A at 24V supports 8.4 kW with a standard 350A circuit breaker.
Related Lengths & Currents (24V)
350A · 5m (24V)350A · 10m (24V)350A · 15m (24V)350A · 20m (24V)350A · 25m (24V)350A · 30m (24V)350A · 35m (24V)350A · 40m (24V)350A · 45m (24V)350A · 50m (24V)350A · 60m (24V)350A · 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)