550 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 550 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 0.49V (2.04%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.43V (10.11%)
Voltage at Load23.5 VLine Loss: 269.7 W
Max Power & Breaker13.2 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A at 25m
| 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 | 392.33 V (1634.72%) | 0.0 V | 647.17 V (2696.53%) | 215783.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 235.4 V (980.83%) | 0.0 V | 388.3 V (1617.92%) | 129470.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 147.12 V (613.02%) | 0.0 V | 242.69 V (1011.2%) | 80918.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 98.08 V (408.68%) | 0.0 V | 161.79 V (674.13%) | 53945.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 58.85 V (245.21%) | 0.0 V | 97.07 V (404.48%) | 32367.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 36.78 V (153.26%) | 0.0 V | 60.67 V (252.8%) | 20229.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 23.54 V (98.08%) | 0.5 V | 38.83 V (161.79%) | 12947.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 16.81 V (70.06%) | 7.2 V | 27.74 V (115.57%) | 9247.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 11.77 V (49.04%) | 12.2 V | 19.41 V (80.9%) | 6473.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 8.41 V (35.03%) | 15.6 V | 13.87 V (57.78%) | 4623.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 6.19 V (25.81%) | 17.8 V | 10.22 V (42.58%) | 3407.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.9 V (20.43%) | 19.1 V | 8.09 V (33.71%) | 2697.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.92 V (16.35%) | 20.1 V | 6.47 V (26.97%) | 2157.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.18 V (13.25%) | 20.8 V | 5.25 V (21.86%) | 1749.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.45 V (10.22%) | 21.5 V | 4.04 V (16.85%) | 1348.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.96 V (8.17%) | 22.0 V | 3.24 V (13.48%) | 1078.9 W | Drop High |
| 400 mm² | 570 A | 445 A | 1.47 V (6.13%) | 22.5 V | 2.43 V (10.11%) | 809.2 W | Drop High |
FAQ — 550 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 550A at 25 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 550A over 25m at 24V (voltage drop: 0.49V or 2.04%).
What is the power capacity of 550A at 24V?
At unity power factor, 550A at 24V supports 13.2 kW with a standard 600A circuit breaker.
Related Lengths & Currents (24V)
550A · 5m (24V)550A · 10m (24V)550A · 15m (24V)550A · 20m (24V)550A · 30m (24V)550A · 35m (24V)550A · 40m (24V)550A · 45m (24V)550A · 50m (24V)550A · 60m (24V)550A · 70m (24V)10A · 25m (24V)16A · 25m (24V)20A · 25m (24V)25A · 25m (24V)32A · 25m (24V)40A · 25m (24V)50A · 25m (24V)63A · 25m (24V)80A · 25m (24V)100A · 25m (24V)125A · 25m (24V)160A · 25m (24V)200A · 25m (24V)