25 Amp Cable Size at 250 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 250 m (820.2 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 1.11V (2.32%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.1V (2.3%)
Voltage at Load46.9 VLine Loss: 27.9 W
Max Power & Breaker1.2 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A 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 | 178.33 V (371.53%) | 0.0 V | 294.17 V (612.85%) | 4458.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 107.0 V (222.92%) | 0.0 V | 176.5 V (367.71%) | 2675.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 66.88 V (139.32%) | 0.0 V | 110.31 V (229.82%) | 1671.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 44.58 V (92.88%) | 3.4 V | 73.54 V (153.21%) | 1114.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 26.75 V (55.73%) | 21.3 V | 44.12 V (91.93%) | 668.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 16.72 V (34.83%) | 31.3 V | 27.58 V (57.45%) | 418.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 10.7 V (22.29%) | 37.3 V | 17.65 V (36.77%) | 267.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 7.64 V (15.92%) | 40.4 V | 12.61 V (26.26%) | 191.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 5.35 V (11.15%) | 42.6 V | 8.82 V (18.39%) | 133.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 3.82 V (7.96%) | 44.2 V | 6.3 V (13.13%) | 95.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.82 V (5.87%) | 45.2 V | 4.64 V (9.68%) | 70.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.23 V (4.64%) | 45.8 V | 3.68 V (7.66%) | 55.7 W | ~ ≤5% |
| 150 mm² | 309 A | 241 A | 1.78 V (3.72%) | 46.2 V | 2.94 V (6.13%) | 44.6 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 1.45 V (3.01%) | 46.6 V | 2.39 V (4.97%) | 36.1 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 1.11 V (2.32%) | 46.9 V | 1.84 V (3.83%) | 27.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.89 V (1.86%) | 47.1 V | 1.47 V (3.06%) | 22.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.67 V (1.39%) | 47.3 V | 1.1 V (2.3%) | 16.7 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 250 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 25A at 250 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 25A over 250m at 48V (voltage drop: 1.11V or 2.32%).
What is the power capacity of 25A at 48V?
At unity power factor, 25A at 48V supports 1.2 kW with a standard 25A circuit breaker.
Related Lengths & Currents (48V)
25A · 5m (48V)25A · 10m (48V)25A · 15m (48V)25A · 20m (48V)25A · 25m (48V)25A · 30m (48V)25A · 35m (48V)25A · 40m (48V)25A · 45m (48V)25A · 50m (48V)25A · 60m (48V)25A · 70m (48V)10A · 250m (48V)16A · 250m (48V)20A · 250m (48V)32A · 250m (48V)40A · 250m (48V)50A · 250m (48V)63A · 250m (48V)80A · 250m (48V)100A · 250m (48V)125A · 250m (48V)160A · 250m (48V)200A · 250m (48V)