80 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 80 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)4× 400 mm²Drop: 0.64V (2.67%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.24V (17.65%)
Voltage at Load23.4 VLine Loss: 51.4 W
Max Power & Breaker1.92 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A 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 | 684.8 V (2853.33%) | 0.0 V | 1129.6 V (4706.67%) | 54784.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 410.88 V (1712.0%) | 0.0 V | 677.76 V (2824.0%) | 32870.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 256.8 V (1070.0%) | 0.0 V | 423.6 V (1765.0%) | 20544.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 171.2 V (713.33%) | 0.0 V | 282.4 V (1176.67%) | 13696.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 102.72 V (428.0%) | 0.0 V | 169.44 V (706.0%) | 8217.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 64.2 V (267.5%) | 0.0 V | 105.9 V (441.25%) | 5136.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 41.09 V (171.2%) | 0.0 V | 67.78 V (282.4%) | 3287.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 29.35 V (122.29%) | 0.0 V | 48.41 V (201.71%) | 2347.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 20.54 V (85.6%) | 3.5 V | 33.89 V (141.2%) | 1643.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 14.67 V (61.14%) | 9.3 V | 24.21 V (100.86%) | 1173.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 10.81 V (45.05%) | 13.2 V | 17.84 V (74.32%) | 865.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 8.56 V (35.67%) | 15.4 V | 14.12 V (58.83%) | 684.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 6.85 V (28.53%) | 17.2 V | 11.3 V (47.07%) | 547.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 5.55 V (23.14%) | 18.4 V | 9.16 V (38.16%) | 444.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 4.28 V (17.83%) | 19.7 V | 7.06 V (29.42%) | 342.4 W | Drop High |
| 300 mm² | 477 A | 372 A | 3.42 V (14.27%) | 20.6 V | 5.65 V (23.53%) | 273.9 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.57 V (10.7%) | 21.4 V | 4.24 V (17.65%) | 205.4 W | Drop High |
FAQ — 80 Amp Cable Size at 300 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 80A at 300 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4× 400 mm² copper cable for 80A over 300m at 24V (voltage drop: 0.64V or 2.67%).
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 · 300m (24V)16A · 300m (24V)20A · 300m (24V)25A · 300m (24V)32A · 300m (24V)40A · 300m (24V)50A · 300m (24V)63A · 300m (24V)100A · 300m (24V)125A · 300m (24V)160A · 300m (24V)200A · 300m (24V)