400 Amp Cable Size at 400 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 400 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)24× 400 mm²Drop: 0.71V (2.97%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 28.24V (117.67%)
Voltage at Load23.3 VLine Loss: 285.3 W
Max Power & Breaker9.6 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 400m
| 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 | 4565.33 V (19022.22%) | 0.0 V | 7530.67 V (31377.78%) | 1826133.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2739.2 V (11413.33%) | 0.0 V | 4518.4 V (18826.67%) | 1095680.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1712.0 V (7133.33%) | 0.0 V | 2824.0 V (11766.67%) | 684800.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1141.33 V (4755.56%) | 0.0 V | 1882.67 V (7844.44%) | 456533.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 684.8 V (2853.33%) | 0.0 V | 1129.6 V (4706.67%) | 273920.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 428.0 V (1783.33%) | 0.0 V | 706.0 V (2941.67%) | 171200.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 273.92 V (1141.33%) | 0.0 V | 451.84 V (1882.67%) | 109568.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 195.66 V (815.24%) | 0.0 V | 322.74 V (1344.76%) | 78262.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 136.96 V (570.67%) | 0.0 V | 225.92 V (941.33%) | 54784.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 97.83 V (407.62%) | 0.0 V | 161.37 V (672.38%) | 39131.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 72.08 V (300.35%) | 0.0 V | 118.91 V (495.44%) | 28833.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 57.07 V (237.78%) | 0.0 V | 94.13 V (392.22%) | 22826.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 45.65 V (190.22%) | 0.0 V | 75.31 V (313.78%) | 18261.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 37.02 V (154.23%) | 0.0 V | 61.06 V (254.41%) | 14806.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 28.53 V (118.89%) | 0.0 V | 47.07 V (196.11%) | 11413.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 22.83 V (95.11%) | 1.2 V | 37.65 V (156.89%) | 9130.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 17.12 V (71.33%) | 6.9 V | 28.24 V (117.67%) | 6848.0 W | Drop High |
FAQ — 400 Amp Cable Size at 400 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 400A at 400 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 24× 400 mm² copper cable for 400A over 400m at 24V (voltage drop: 0.71V or 2.97%).
What is the power capacity of 400A at 24V?
At unity power factor, 400A at 24V supports 9.6 kW with a standard 400A circuit breaker.
Related Lengths & Currents (24V)
400A · 5m (24V)400A · 10m (24V)400A · 15m (24V)400A · 20m (24V)400A · 25m (24V)400A · 30m (24V)400A · 35m (24V)400A · 40m (24V)400A · 45m (24V)400A · 50m (24V)400A · 60m (24V)400A · 70m (24V)10A · 400m (24V)16A · 400m (24V)20A · 400m (24V)25A · 400m (24V)32A · 400m (24V)40A · 400m (24V)50A · 400m (24V)63A · 400m (24V)80A · 400m (24V)100A · 400m (24V)125A · 400m (24V)160A · 400m (24V)200A · 400m (24V)