550 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 550 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)21× 400 mm²Drop: 0.7V (2.92%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 24.27V (101.12%)
Voltage at Load23.3 VLine Loss: 385.3 W
Max Power & Breaker13.2 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A 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 | 3923.33 V (16347.22%) | 0.0 V | 6471.67 V (26965.28%) | 2157833.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2354.0 V (9808.33%) | 0.0 V | 3883.0 V (16179.17%) | 1294700.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1471.25 V (6130.21%) | 0.0 V | 2426.88 V (10111.98%) | 809187.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 980.83 V (4086.81%) | 0.0 V | 1617.92 V (6741.32%) | 539458.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 588.5 V (2452.08%) | 0.0 V | 970.75 V (4044.79%) | 323675.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 367.81 V (1532.55%) | 0.0 V | 606.72 V (2527.99%) | 202296.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 235.4 V (980.83%) | 0.0 V | 388.3 V (1617.92%) | 129470.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 168.14 V (700.6%) | 0.0 V | 277.36 V (1155.65%) | 92478.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 117.7 V (490.42%) | 0.0 V | 194.15 V (808.96%) | 64735.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 84.07 V (350.3%) | 0.0 V | 138.68 V (577.83%) | 46239.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 61.95 V (258.11%) | 0.0 V | 102.18 V (425.77%) | 34071.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 49.04 V (204.34%) | 0.0 V | 80.9 V (337.07%) | 26972.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 39.23 V (163.47%) | 0.0 V | 64.72 V (269.65%) | 21578.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 31.81 V (132.55%) | 0.0 V | 52.47 V (218.64%) | 17495.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 24.52 V (102.17%) | 0.0 V | 40.45 V (168.53%) | 13486.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 19.62 V (81.74%) | 4.4 V | 32.36 V (134.83%) | 10789.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 14.71 V (61.3%) | 9.3 V | 24.27 V (101.12%) | 8091.9 W | Drop High |
FAQ — 550 Amp Cable Size at 250 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 550A at 250 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 21× 400 mm² copper cable for 550A over 250m at 24V (voltage drop: 0.7V or 2.92%).
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 · 25m (24V)550A · 30m (24V)550A · 35m (24V)550A · 40m (24V)550A · 45m (24V)550A · 50m (24V)550A · 60m (24V)550A · 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)80A · 250m (24V)100A · 250m (24V)125A · 250m (24V)160A · 250m (24V)200A · 250m (24V)