45 Amp Cable Size at 25 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 45 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 1.38V (2.87%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 1.13V (2.36%)
Voltage at Load46.6 VLine Loss: 61.9 W
Max Power & Breaker2.16 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A 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 | 32.1 V (66.87%) | 15.9 V | 52.95 V (110.31%) | 1444.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 19.26 V (40.12%) | 28.7 V | 31.77 V (66.19%) | 866.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 12.04 V (25.08%) | 36.0 V | 19.86 V (41.37%) | 541.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 8.02 V (16.72%) | 40.0 V | 13.24 V (27.58%) | 361.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 4.81 V (10.03%) | 43.2 V | 7.94 V (16.55%) | 216.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.01 V (6.27%) | 45.0 V | 4.96 V (10.34%) | 135.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 1.93 V (4.01%) | 46.1 V | 3.18 V (6.62%) | 86.7 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 1.38 V (2.87%) | 46.6 V | 2.27 V (4.73%) | 61.9 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.96 V (2.01%) | 47.0 V | 1.59 V (3.31%) | 43.3 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.69 V (1.43%) | 47.3 V | 1.13 V (2.36%) | 31.0 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.51 V (1.06%) | 47.5 V | 0.84 V (1.74%) | 22.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.4 V (0.84%) | 47.6 V | 0.66 V (1.38%) | 18.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.32 V (0.67%) | 47.7 V | 0.53 V (1.1%) | 14.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.26 V (0.54%) | 47.7 V | 0.43 V (0.89%) | 11.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.2 V (0.42%) | 47.8 V | 0.33 V (0.69%) | 9.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.16 V (0.33%) | 47.8 V | 0.26 V (0.55%) | 7.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.12 V (0.25%) | 47.9 V | 0.2 V (0.41%) | 5.4 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 25 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 45A at 25 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 45A over 25m at 48V (voltage drop: 1.38V or 2.87%).
What is the power capacity of 45A at 48V?
At unity power factor, 45A at 48V supports 2.16 kW with a standard 45A circuit breaker.
Related Lengths & Currents (48V)
45A · 5m (48V)45A · 10m (48V)45A · 15m (48V)45A · 20m (48V)45A · 30m (48V)45A · 35m (48V)45A · 40m (48V)45A · 45m (48V)45A · 50m (48V)45A · 60m (48V)45A · 70m (48V)10A · 25m (48V)16A · 25m (48V)20A · 25m (48V)25A · 25m (48V)32A · 25m (48V)40A · 25m (48V)50A · 25m (48V)63A · 25m (48V)80A · 25m (48V)100A · 25m (48V)125A · 25m (48V)160A · 25m (48V)200A · 25m (48V)