40 Amp Cable Size at 175 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 40 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 1.25V (2.6%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.24V (2.57%)
Voltage at Load46.8 VLine Loss: 49.9 W
Max Power & Breaker1.92 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 175m
| 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 | 199.73 V (416.11%) | 0.0 V | 329.47 V (686.39%) | 7989.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 119.84 V (249.67%) | 0.0 V | 197.68 V (411.83%) | 4793.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 74.9 V (156.04%) | 0.0 V | 123.55 V (257.4%) | 2996.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 49.93 V (104.03%) | 0.0 V | 82.37 V (171.6%) | 1997.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 29.96 V (62.42%) | 18.0 V | 49.42 V (102.96%) | 1198.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 18.72 V (39.01%) | 29.3 V | 30.89 V (64.35%) | 749.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 11.98 V (24.97%) | 36.0 V | 19.77 V (41.18%) | 479.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 8.56 V (17.83%) | 39.4 V | 14.12 V (29.42%) | 342.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 5.99 V (12.48%) | 42.0 V | 9.88 V (20.59%) | 239.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 4.28 V (8.92%) | 43.7 V | 7.06 V (14.71%) | 171.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.15 V (6.57%) | 44.8 V | 5.2 V (10.84%) | 126.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.5 V (5.2%) | 45.5 V | 4.12 V (8.58%) | 99.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.0 V (4.16%) | 46.0 V | 3.29 V (6.86%) | 79.9 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 1.62 V (3.37%) | 46.4 V | 2.67 V (5.57%) | 64.8 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 1.25 V (2.6%) | 46.8 V | 2.06 V (4.29%) | 49.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.0 V (2.08%) | 47.0 V | 1.65 V (3.43%) | 39.9 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.75 V (1.56%) | 47.3 V | 1.24 V (2.57%) | 30.0 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 175 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 40A at 175 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 40A over 175m at 48V (voltage drop: 1.25V or 2.6%).
What is the power capacity of 40A at 48V?
At unity power factor, 40A at 48V supports 1.92 kW with a standard 40A circuit breaker.
Related Lengths & Currents (48V)
40A · 5m (48V)40A · 10m (48V)40A · 15m (48V)40A · 20m (48V)40A · 25m (48V)40A · 30m (48V)40A · 35m (48V)40A · 40m (48V)40A · 45m (48V)40A · 50m (48V)40A · 60m (48V)40A · 70m (48V)10A · 175m (48V)16A · 175m (48V)20A · 175m (48V)25A · 175m (48V)32A · 175m (48V)50A · 175m (48V)63A · 175m (48V)80A · 175m (48V)100A · 175m (48V)125A · 175m (48V)160A · 175m (48V)200A · 175m (48V)