800 Amp Cable Size at 40 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 800 A over 40 m (131.2 ft).
Copper Cable (≤3% Drop)3× 400 mm²Drop: 1.14V (2.38%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 5.65V (11.77%)
Voltage at Load46.9 VLine Loss: 913.1 W
Max Power & Breaker38.4 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 40m
| 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 | 913.07 V (1902.22%) | 0.0 V | 1506.13 V (3137.78%) | 730453.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 547.84 V (1141.33%) | 0.0 V | 903.68 V (1882.67%) | 438272.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 342.4 V (713.33%) | 0.0 V | 564.8 V (1176.67%) | 273920.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 228.27 V (475.56%) | 0.0 V | 376.53 V (784.44%) | 182613.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 136.96 V (285.33%) | 0.0 V | 225.92 V (470.67%) | 109568.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 85.6 V (178.33%) | 0.0 V | 141.2 V (294.17%) | 68480.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 54.78 V (114.13%) | 0.0 V | 90.37 V (188.27%) | 43827.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 39.13 V (81.52%) | 8.9 V | 64.55 V (134.48%) | 31305.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 27.39 V (57.07%) | 20.6 V | 45.18 V (94.13%) | 21913.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 19.57 V (40.76%) | 28.4 V | 32.27 V (67.24%) | 15652.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 14.42 V (30.04%) | 33.6 V | 23.78 V (49.54%) | 11533.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 11.41 V (23.78%) | 36.6 V | 18.83 V (39.22%) | 9130.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.13 V (19.02%) | 38.9 V | 15.06 V (31.38%) | 7304.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.4 V (15.42%) | 40.6 V | 12.21 V (25.44%) | 5922.6 W | Drop High |
| 240 mm² | 415 A | 324 A | 5.71 V (11.89%) | 42.3 V | 9.41 V (19.61%) | 4565.3 W | Drop High |
| 300 mm² | 477 A | 372 A | 4.57 V (9.51%) | 43.4 V | 7.53 V (15.69%) | 3652.3 W | Drop High |
| 400 mm² | 570 A | 445 A | 3.42 V (7.13%) | 44.6 V | 5.65 V (11.77%) | 2739.2 W | Drop High |
FAQ — 800 Amp Cable Size at 40 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 800A at 40 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 3× 400 mm² copper cable for 800A over 40m at 48V (voltage drop: 1.14V or 2.38%).
What is the power capacity of 800A at 48V?
At unity power factor, 800A at 48V supports 38.4 kW with a standard 800A circuit breaker.
Related Lengths & Currents (48V)
800A · 5m (48V)800A · 10m (48V)800A · 15m (48V)800A · 20m (48V)800A · 25m (48V)800A · 30m (48V)800A · 35m (48V)800A · 45m (48V)800A · 50m (48V)800A · 60m (48V)800A · 70m (48V)10A · 40m (48V)16A · 40m (48V)20A · 40m (48V)25A · 40m (48V)32A · 40m (48V)40A · 40m (48V)50A · 40m (48V)63A · 40m (48V)80A · 40m (48V)100A · 40m (48V)125A · 40m (48V)160A · 40m (48V)200A · 40m (48V)