300 Amp Cable Size at 45 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 45 m (147.6 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 0.72V (1.5%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 2.38V (4.96%)
Voltage at Load47.3 VLine Loss: 216.7 W
Max Power & Breaker14.4 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 45m
| 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 | 385.2 V (802.5%) | 0.0 V | 635.4 V (1323.75%) | 115560.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 231.12 V (481.5%) | 0.0 V | 381.24 V (794.25%) | 69336.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 144.45 V (300.94%) | 0.0 V | 238.27 V (496.41%) | 43335.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 96.3 V (200.62%) | 0.0 V | 158.85 V (330.94%) | 28890.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 57.78 V (120.38%) | 0.0 V | 95.31 V (198.56%) | 17334.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 36.11 V (75.23%) | 11.9 V | 59.57 V (124.1%) | 10833.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 23.11 V (48.15%) | 24.9 V | 38.12 V (79.42%) | 6933.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 16.51 V (34.39%) | 31.5 V | 27.23 V (56.73%) | 4952.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 11.56 V (24.07%) | 36.4 V | 19.06 V (39.71%) | 3466.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 8.25 V (17.2%) | 39.7 V | 13.62 V (28.37%) | 2476.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 6.08 V (12.67%) | 41.9 V | 10.03 V (20.9%) | 1824.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.81 V (10.03%) | 43.2 V | 7.94 V (16.55%) | 1444.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.85 V (8.03%) | 44.1 V | 6.35 V (13.24%) | 1155.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.12 V (6.51%) | 44.9 V | 5.15 V (10.73%) | 937.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 2.41 V (5.02%) | 45.6 V | 3.97 V (8.27%) | 722.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.93 V (4.01%) | 46.1 V | 3.18 V (6.62%) | 577.8 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 1.44 V (3.01%) | 46.6 V | 2.38 V (4.96%) | 433.3 W | ~ ≤5% |
FAQ — 300 Amp Cable Size at 45 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 300A at 45 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 300A over 45m at 48V (voltage drop: 0.72V or 1.5%).
What is the power capacity of 300A at 48V?
At unity power factor, 300A at 48V supports 14.4 kW with a standard 300A circuit breaker.
Related Lengths & Currents (48V)
300A · 5m (48V)300A · 10m (48V)300A · 15m (48V)300A · 20m (48V)300A · 25m (48V)300A · 30m (48V)300A · 35m (48V)300A · 40m (48V)300A · 50m (48V)300A · 60m (48V)300A · 70m (48V)10A · 45m (48V)16A · 45m (48V)20A · 45m (48V)25A · 45m (48V)32A · 45m (48V)40A · 45m (48V)50A · 45m (48V)63A · 45m (48V)80A · 45m (48V)100A · 45m (48V)125A · 45m (48V)160A · 45m (48V)200A · 45m (48V)