400 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)5× 400 mm²Drop: 0.68V (2.85%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.65V (23.53%)
Voltage at Load23.3 VLine Loss: 273.9 W
Max Power & Breaker9.6 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 80m
| 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 | 913.07 V (3804.44%) | 0.0 V | 1506.13 V (6275.56%) | 365226.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 547.84 V (2282.67%) | 0.0 V | 903.68 V (3765.33%) | 219136.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 342.4 V (1426.67%) | 0.0 V | 564.8 V (2353.33%) | 136960.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 228.27 V (951.11%) | 0.0 V | 376.53 V (1568.89%) | 91306.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 136.96 V (570.67%) | 0.0 V | 225.92 V (941.33%) | 54784.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 85.6 V (356.67%) | 0.0 V | 141.2 V (588.33%) | 34240.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 54.78 V (228.27%) | 0.0 V | 90.37 V (376.53%) | 21913.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 39.13 V (163.05%) | 0.0 V | 64.55 V (268.95%) | 15652.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 27.39 V (114.13%) | 0.0 V | 45.18 V (188.27%) | 10956.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 19.57 V (81.52%) | 4.4 V | 32.27 V (134.48%) | 7826.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 14.42 V (60.07%) | 9.6 V | 23.78 V (99.09%) | 5766.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.41 V (47.56%) | 12.6 V | 18.83 V (78.44%) | 4565.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.13 V (38.04%) | 14.9 V | 15.06 V (62.76%) | 3652.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.4 V (30.85%) | 16.6 V | 12.21 V (50.88%) | 2961.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.71 V (23.78%) | 18.3 V | 9.41 V (39.22%) | 2282.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.57 V (19.02%) | 19.4 V | 7.53 V (31.38%) | 1826.1 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.42 V (14.27%) | 20.6 V | 5.65 V (23.53%) | 1369.6 W | Drop High |
FAQ — 400 Amp Cable Size at 80 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 400A at 80 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 5× 400 mm² copper cable for 400A over 80m at 24V (voltage drop: 0.68V or 2.85%).
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 · 80m (24V)16A · 80m (24V)20A · 80m (24V)25A · 80m (24V)32A · 80m (24V)40A · 80m (24V)50A · 80m (24V)63A · 80m (24V)80A · 80m (24V)100A · 80m (24V)125A · 80m (24V)160A · 80m (24V)200A · 80m (24V)