45 Amp Cable Size at 15 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 15 m (49.2 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 1.16V (2.41%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 1.36V (2.84%)
Voltage at Load46.8 VLine Loss: 52.0 W
Max Power & Breaker2.16 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 15m
| 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 | 19.26 V (40.12%) | 28.7 V | 31.77 V (66.19%) | 866.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 11.56 V (24.08%) | 36.4 V | 19.06 V (39.71%) | 520.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 7.22 V (15.05%) | 40.8 V | 11.91 V (24.82%) | 325.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 4.81 V (10.03%) | 43.2 V | 7.94 V (16.55%) | 216.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 2.89 V (6.02%) | 45.1 V | 4.77 V (9.93%) | 130.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 1.81 V (3.76%) | 46.2 V | 2.98 V (6.21%) | 81.3 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 1.16 V (2.41%) | 46.8 V | 1.91 V (3.97%) | 52.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.83 V (1.72%) | 47.2 V | 1.36 V (2.84%) | 37.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.58 V (1.2%) | 47.4 V | 0.95 V (1.99%) | 26.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.41 V (0.86%) | 47.6 V | 0.68 V (1.42%) | 18.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.3 V (0.63%) | 47.7 V | 0.5 V (1.05%) | 13.7 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.24 V (0.5%) | 47.8 V | 0.4 V (0.83%) | 10.8 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.19 V (0.4%) | 47.8 V | 0.32 V (0.66%) | 8.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.16 V (0.33%) | 47.8 V | 0.26 V (0.54%) | 7.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.12 V (0.25%) | 47.9 V | 0.2 V (0.41%) | 5.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.1 V (0.2%) | 47.9 V | 0.16 V (0.33%) | 4.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.07 V (0.15%) | 47.9 V | 0.12 V (0.25%) | 3.3 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 15 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 45A at 15 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 45A over 15m at 48V (voltage drop: 1.16V or 2.41%).
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 · 20m (48V)45A · 25m (48V)45A · 30m (48V)45A · 35m (48V)45A · 40m (48V)45A · 45m (48V)45A · 50m (48V)45A · 60m (48V)45A · 70m (48V)10A · 15m (48V)16A · 15m (48V)20A · 15m (48V)25A · 15m (48V)32A · 15m (48V)40A · 15m (48V)50A · 15m (48V)63A · 15m (48V)80A · 15m (48V)100A · 15m (48V)125A · 15m (48V)160A · 15m (48V)200A · 15m (48V)