400 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)4× 400 mm²Drop: 1.28V (2.67%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.47V (17.65%)
Voltage at Load46.7 VLine Loss: 513.6 W
Max Power & Breaker19.2 kW400A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 400A at 120m
| 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 | 1369.6 V (2853.33%) | 0.0 V | 2259.2 V (4706.67%) | 547840.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 821.76 V (1712.0%) | 0.0 V | 1355.52 V (2824.0%) | 328704.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 513.6 V (1070.0%) | 0.0 V | 847.2 V (1765.0%) | 205440.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 342.4 V (713.33%) | 0.0 V | 564.8 V (1176.67%) | 136960.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 205.44 V (428.0%) | 0.0 V | 338.88 V (706.0%) | 82176.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 128.4 V (267.5%) | 0.0 V | 211.8 V (441.25%) | 51360.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 82.18 V (171.2%) | 0.0 V | 135.55 V (282.4%) | 32870.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 58.7 V (122.29%) | 0.0 V | 96.82 V (201.71%) | 23478.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 41.09 V (85.6%) | 6.9 V | 67.78 V (141.2%) | 16435.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 29.35 V (61.14%) | 18.7 V | 48.41 V (100.86%) | 11739.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 21.63 V (45.05%) | 26.4 V | 35.67 V (74.32%) | 8650.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 17.12 V (35.67%) | 30.9 V | 28.24 V (58.83%) | 6848.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 13.7 V (28.53%) | 34.3 V | 22.59 V (47.07%) | 5478.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 11.1 V (23.14%) | 36.9 V | 18.32 V (38.16%) | 4441.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.56 V (17.83%) | 39.4 V | 14.12 V (29.42%) | 3424.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.85 V (14.27%) | 41.2 V | 11.3 V (23.53%) | 2739.2 W | Drop High |
| 400 mm² | 570 A | 445 A | 5.14 V (10.7%) | 42.9 V | 8.47 V (17.65%) | 2054.4 W | Drop High |
FAQ — 400 Amp Cable Size at 120 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 400A at 120 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4× 400 mm² copper cable for 400A over 120m at 48V (voltage drop: 1.28V or 2.67%).
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 · 120m (48V)16A · 120m (48V)20A · 120m (48V)25A · 120m (48V)32A · 120m (48V)40A · 120m (48V)50A · 120m (48V)63A · 120m (48V)80A · 120m (48V)100A · 120m (48V)125A · 120m (48V)160A · 120m (48V)200A · 120m (48V)