800 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 800 A over 400 m (1312.3 ft).
Copper Cable (≤3% Drop)48× 400 mm²Drop: 0.71V (2.97%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 56.48V (235.33%)
Voltage at Load23.3 VLine Loss: 570.7 W
Max Power & Breaker19.2 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A 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 | 9130.67 V (38044.44%) | 0.0 V | 15061.33 V (62755.56%) | 7304533.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 5478.4 V (22826.67%) | 0.0 V | 9036.8 V (37653.33%) | 4382720.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 3424.0 V (14266.67%) | 0.0 V | 5648.0 V (23533.33%) | 2739200.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 2282.67 V (9511.11%) | 0.0 V | 3765.33 V (15688.89%) | 1826133.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 1369.6 V (5706.67%) | 0.0 V | 2259.2 V (9413.33%) | 1095680.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 856.0 V (3566.67%) | 0.0 V | 1412.0 V (5883.33%) | 684800.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 547.84 V (2282.67%) | 0.0 V | 903.68 V (3765.33%) | 438272.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 391.31 V (1630.48%) | 0.0 V | 645.49 V (2689.52%) | 313051.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 273.92 V (1141.33%) | 0.0 V | 451.84 V (1882.67%) | 219136.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 195.66 V (815.24%) | 0.0 V | 322.74 V (1344.76%) | 156525.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 144.17 V (600.7%) | 0.0 V | 237.81 V (990.88%) | 115334.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 114.13 V (475.56%) | 0.0 V | 188.27 V (784.44%) | 91306.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 91.31 V (380.44%) | 0.0 V | 150.61 V (627.56%) | 73045.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 74.03 V (308.47%) | 0.0 V | 122.12 V (508.83%) | 59225.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 57.07 V (237.78%) | 0.0 V | 94.13 V (392.22%) | 45653.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 45.65 V (190.22%) | 0.0 V | 75.31 V (313.78%) | 36522.7 W | Drop High |
| 400 mm² | 570 A | 445 A | 34.24 V (142.67%) | 0.0 V | 56.48 V (235.33%) | 27392.0 W | Drop High |
FAQ — 800 Amp Cable Size at 400 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 800A at 400 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 48× 400 mm² copper cable for 800A over 400m at 24V (voltage drop: 0.71V or 2.97%).
What is the power capacity of 800A at 24V?
At unity power factor, 800A at 24V supports 19.2 kW with a standard 800A circuit breaker.
Related Lengths & Currents (24V)
800A · 5m (24V)800A · 10m (24V)800A · 15m (24V)800A · 20m (24V)800A · 25m (24V)800A · 30m (24V)800A · 35m (24V)800A · 40m (24V)800A · 45m (24V)800A · 50m (24V)800A · 60m (24V)800A · 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)