350 Amp Cable Size at 300 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 300 m (984.3 ft).
Copper Cable (≤3% Drop)16× 400 mm²Drop: 0.7V (2.93%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 18.53V (77.22%)
Voltage at Load23.3 VLine Loss: 245.8 W
Max Power & Breaker8.4 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 350A at 300m
| 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 | 2996.0 V (12483.33%) | 0.0 V | 4942.0 V (20591.67%) | 1048600.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1797.6 V (7490.0%) | 0.0 V | 2965.2 V (12355.0%) | 629160.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1123.5 V (4681.25%) | 0.0 V | 1853.25 V (7721.88%) | 393225.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 749.0 V (3120.83%) | 0.0 V | 1235.5 V (5147.92%) | 262150.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 449.4 V (1872.5%) | 0.0 V | 741.3 V (3088.75%) | 157290.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 280.88 V (1170.31%) | 0.0 V | 463.31 V (1930.47%) | 98306.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 179.76 V (749.0%) | 0.0 V | 296.52 V (1235.5%) | 62916.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 128.4 V (535.0%) | 0.0 V | 211.8 V (882.5%) | 44940.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 89.88 V (374.5%) | 0.0 V | 148.26 V (617.75%) | 31458.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 64.2 V (267.5%) | 0.0 V | 105.9 V (441.25%) | 22470.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 47.31 V (197.11%) | 0.0 V | 78.03 V (325.13%) | 16556.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 37.45 V (156.04%) | 0.0 V | 61.77 V (257.4%) | 13107.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 29.96 V (124.83%) | 0.0 V | 49.42 V (205.92%) | 10486.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 24.29 V (101.22%) | 0.0 V | 40.07 V (166.96%) | 8502.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 18.72 V (78.02%) | 5.3 V | 30.89 V (128.7%) | 6553.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 14.98 V (62.42%) | 9.0 V | 24.71 V (102.96%) | 5243.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 11.23 V (46.81%) | 12.8 V | 18.53 V (77.22%) | 3932.2 W | Drop High |
FAQ — 350 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 350A at 300 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16× 400 mm² copper cable for 350A over 300m at 24V (voltage drop: 0.7V or 2.93%).
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 · 300m (24V)16A · 300m (24V)20A · 300m (24V)25A · 300m (24V)32A · 300m (24V)40A · 300m (24V)50A · 300m (24V)63A · 300m (24V)80A · 300m (24V)100A · 300m (24V)125A · 300m (24V)160A · 300m (24V)200A · 300m (24V)