80 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 80 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 0.71V (2.97%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.53V (14.71%)
Voltage at Load23.3 VLine Loss: 57.1 W
Max Power & Breaker1.92 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A at 250m
| 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 | 570.67 V (2377.78%) | 0.0 V | 941.33 V (3922.22%) | 45653.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 342.4 V (1426.67%) | 0.0 V | 564.8 V (2353.33%) | 27392.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 214.0 V (891.67%) | 0.0 V | 353.0 V (1470.83%) | 17120.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 142.67 V (594.44%) | 0.0 V | 235.33 V (980.56%) | 11413.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 85.6 V (356.67%) | 0.0 V | 141.2 V (588.33%) | 6848.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 53.5 V (222.92%) | 0.0 V | 88.25 V (367.71%) | 4280.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 34.24 V (142.67%) | 0.0 V | 56.48 V (235.33%) | 2739.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 24.46 V (101.9%) | 0.0 V | 40.34 V (168.1%) | 1956.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 17.12 V (71.33%) | 6.9 V | 28.24 V (117.67%) | 1369.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 12.23 V (50.95%) | 11.8 V | 20.17 V (84.05%) | 978.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 9.01 V (37.54%) | 15.0 V | 14.86 V (61.93%) | 720.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 7.13 V (29.72%) | 16.9 V | 11.77 V (49.03%) | 570.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.71 V (23.78%) | 18.3 V | 9.41 V (39.22%) | 456.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.63 V (19.28%) | 19.4 V | 7.63 V (31.8%) | 370.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.57 V (14.86%) | 20.4 V | 5.88 V (24.51%) | 285.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.85 V (11.89%) | 21.1 V | 4.71 V (19.61%) | 228.3 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 171.2 W | Drop High |
FAQ — 80 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 80A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 80A over 250m at 24V (voltage drop: 0.71V or 2.97%).
What is the power capacity of 80A at 24V?
At unity power factor, 80A at 24V supports 1.92 kW with a standard 80A circuit breaker.
Related Lengths & Currents (24V)
80A · 5m (24V)80A · 10m (24V)80A · 15m (24V)80A · 20m (24V)80A · 25m (24V)80A · 30m (24V)80A · 35m (24V)80A · 40m (24V)80A · 45m (24V)80A · 50m (24V)80A · 60m (24V)80A · 70m (24V)10A · 250m (24V)16A · 250m (24V)20A · 250m (24V)25A · 250m (24V)32A · 250m (24V)40A · 250m (24V)50A · 250m (24V)63A · 250m (24V)100A · 250m (24V)125A · 250m (24V)160A · 250m (24V)200A · 250m (24V)