25 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 25 A over 15 m (49.2 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 1.0V (2.09%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 1.06V (2.21%)
Voltage at Load47.0 VLine Loss: 25.1 W
Max Power & Breaker1.2 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A 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 | 10.7 V (22.29%) | 37.3 V | 17.65 V (36.77%) | 267.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 6.42 V (13.38%) | 41.6 V | 10.59 V (22.06%) | 160.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 4.01 V (8.36%) | 44.0 V | 6.62 V (13.79%) | 100.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 2.67 V (5.57%) | 45.3 V | 4.41 V (9.19%) | 66.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 1.61 V (3.34%) | 46.4 V | 2.65 V (5.52%) | 40.1 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 1.0 V (2.09%) | 47.0 V | 1.65 V (3.45%) | 25.1 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.64 V (1.34%) | 47.4 V | 1.06 V (2.21%) | 16.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.46 V (0.96%) | 47.5 V | 0.76 V (1.58%) | 11.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.32 V (0.67%) | 47.7 V | 0.53 V (1.1%) | 8.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.23 V (0.48%) | 47.8 V | 0.38 V (0.79%) | 5.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.17 V (0.35%) | 47.8 V | 0.28 V (0.58%) | 4.2 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.13 V (0.28%) | 47.9 V | 0.22 V (0.46%) | 3.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.11 V (0.22%) | 47.9 V | 0.18 V (0.37%) | 2.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.09 V (0.18%) | 47.9 V | 0.14 V (0.3%) | 2.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.07 V (0.14%) | 47.9 V | 0.11 V (0.23%) | 1.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.05 V (0.11%) | 47.9 V | 0.09 V (0.18%) | 1.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.04 V (0.08%) | 48.0 V | 0.07 V (0.14%) | 1.0 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 15 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 25A at 15 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 25A over 15m at 48V (voltage drop: 1.0V or 2.09%).
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 · 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 · 15m (48V)16A · 15m (48V)20A · 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)