400 Amp Cable Size at 300 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 400 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)9× 400 mm²Drop: 1.43V (2.97%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 21.18V (44.12%)
Voltage at Load46.6 VLine Loss: 570.7 W
Max Power & Breaker19.2 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 300m
| 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 | 3424.0 V (7133.33%) | 0.0 V | 5648.0 V (11766.67%) | 1369600.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2054.4 V (4280.0%) | 0.0 V | 3388.8 V (7060.0%) | 821760.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1284.0 V (2675.0%) | 0.0 V | 2118.0 V (4412.5%) | 513600.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 856.0 V (1783.33%) | 0.0 V | 1412.0 V (2941.67%) | 342400.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 513.6 V (1070.0%) | 0.0 V | 847.2 V (1765.0%) | 205440.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 321.0 V (668.75%) | 0.0 V | 529.5 V (1103.12%) | 128400.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 205.44 V (428.0%) | 0.0 V | 338.88 V (706.0%) | 82176.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 146.74 V (305.71%) | 0.0 V | 242.06 V (504.29%) | 58697.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 102.72 V (214.0%) | 0.0 V | 169.44 V (353.0%) | 41088.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 73.37 V (152.86%) | 0.0 V | 121.03 V (252.14%) | 29348.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 54.06 V (112.63%) | 0.0 V | 89.18 V (185.79%) | 21625.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 42.8 V (89.17%) | 5.2 V | 70.6 V (147.08%) | 17120.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 34.24 V (71.33%) | 13.8 V | 56.48 V (117.67%) | 13696.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 27.76 V (57.84%) | 20.2 V | 45.79 V (95.41%) | 11104.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 21.4 V (44.58%) | 26.6 V | 35.3 V (73.54%) | 8560.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 17.12 V (35.67%) | 30.9 V | 28.24 V (58.83%) | 6848.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 12.84 V (26.75%) | 35.2 V | 21.18 V (44.12%) | 5136.0 W | Drop High |
FAQ — 400 Amp Cable Size at 300 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 400A at 300 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 9× 400 mm² copper cable for 400A over 300m at 48V (voltage drop: 1.43V or 2.97%).
What is the power capacity of 400A at 48V?
At unity power factor, 400A at 48V supports 19.2 kW with a standard 400A circuit breaker.
Related Lengths & Currents (48V)
400A · 5m (48V)400A · 10m (48V)400A · 15m (48V)400A · 20m (48V)400A · 25m (48V)400A · 30m (48V)400A · 35m (48V)400A · 40m (48V)400A · 45m (48V)400A · 50m (48V)400A · 60m (48V)400A · 70m (48V)10A · 300m (48V)16A · 300m (48V)20A · 300m (48V)25A · 300m (48V)32A · 300m (48V)40A · 300m (48V)50A · 300m (48V)63A · 300m (48V)80A · 300m (48V)100A · 300m (48V)125A · 300m (48V)160A · 300m (48V)200A · 300m (48V)