30 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 30 A over 15 m (49.2 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 1.2V (2.51%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 1.27V (2.65%)
Voltage at Load46.8 VLine Loss: 36.1 W
Max Power & Breaker1.44 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A 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 | 12.84 V (26.75%) | 35.2 V | 21.18 V (44.12%) | 385.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 7.7 V (16.05%) | 40.3 V | 12.71 V (26.47%) | 231.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 4.82 V (10.03%) | 43.2 V | 7.94 V (16.55%) | 144.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 3.21 V (6.69%) | 44.8 V | 5.29 V (11.03%) | 96.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 1.93 V (4.01%) | 46.1 V | 3.18 V (6.62%) | 57.8 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 1.2 V (2.51%) | 46.8 V | 1.99 V (4.14%) | 36.1 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.77 V (1.61%) | 47.2 V | 1.27 V (2.65%) | 23.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.55 V (1.15%) | 47.4 V | 0.91 V (1.89%) | 16.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.39 V (0.8%) | 47.6 V | 0.64 V (1.32%) | 11.6 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.28 V (0.57%) | 47.7 V | 0.45 V (0.95%) | 8.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.2 V (0.42%) | 47.8 V | 0.33 V (0.7%) | 6.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.16 V (0.33%) | 47.8 V | 0.26 V (0.55%) | 4.8 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.13 V (0.27%) | 47.9 V | 0.21 V (0.44%) | 3.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.1 V (0.22%) | 47.9 V | 0.17 V (0.36%) | 3.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.08 V (0.17%) | 47.9 V | 0.13 V (0.28%) | 2.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.06 V (0.13%) | 47.9 V | 0.11 V (0.22%) | 1.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.05 V (0.1%) | 48.0 V | 0.08 V (0.17%) | 1.4 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 15 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 30A 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 30A over 15m at 48V (voltage drop: 1.2V or 2.51%).
What is the power capacity of 30A at 48V?
At unity power factor, 30A at 48V supports 1.44 kW with a standard 30A circuit breaker.
Related Lengths & Currents (48V)
30A · 5m (48V)30A · 10m (48V)30A · 20m (48V)30A · 25m (48V)30A · 30m (48V)30A · 35m (48V)30A · 40m (48V)30A · 45m (48V)30A · 50m (48V)30A · 60m (48V)30A · 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)