125 Amp Cable Size at 500 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 125 A over 500 m (1640.4 ft).
Copper Cable (≤3% Drop)5× 400 mm²Drop: 1.34V (2.79%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 11.03V (22.98%)
Voltage at Load46.7 VLine Loss: 167.2 W
Max Power & Breaker6.0 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A at 500m
| 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 | 1783.33 V (3715.28%) | 0.0 V | 2941.67 V (6128.47%) | 222916.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1070.0 V (2229.17%) | 0.0 V | 1765.0 V (3677.08%) | 133750.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 668.75 V (1393.23%) | 0.0 V | 1103.12 V (2298.18%) | 83593.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 445.83 V (928.82%) | 0.0 V | 735.42 V (1532.12%) | 55729.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 267.5 V (557.29%) | 0.0 V | 441.25 V (919.27%) | 33437.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 167.19 V (348.31%) | 0.0 V | 275.78 V (574.54%) | 20898.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 107.0 V (222.92%) | 0.0 V | 176.5 V (367.71%) | 13375.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 76.43 V (159.23%) | 0.0 V | 126.07 V (262.65%) | 9553.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 53.5 V (111.46%) | 0.0 V | 88.25 V (183.85%) | 6687.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 38.21 V (79.61%) | 9.8 V | 63.04 V (131.32%) | 4776.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 28.16 V (58.66%) | 19.8 V | 46.45 V (96.77%) | 3519.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 22.29 V (46.44%) | 25.7 V | 36.77 V (76.61%) | 2786.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 17.83 V (37.15%) | 30.2 V | 29.42 V (61.28%) | 2229.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 14.46 V (30.12%) | 33.5 V | 23.85 V (49.69%) | 1807.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 11.15 V (23.22%) | 36.9 V | 18.39 V (38.3%) | 1393.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 8.92 V (18.58%) | 39.1 V | 14.71 V (30.64%) | 1114.6 W | Drop High |
| 400 mm² | 570 A | 445 A | 6.69 V (13.93%) | 41.3 V | 11.03 V (22.98%) | 835.9 W | Drop High |
FAQ — 125 Amp Cable Size at 500 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 125A at 500 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 5× 400 mm² copper cable for 125A over 500m at 48V (voltage drop: 1.34V or 2.79%).
What is the power capacity of 125A at 48V?
At unity power factor, 125A at 48V supports 6.0 kW with a standard 125A circuit breaker.
Related Lengths & Currents (48V)
125A · 5m (48V)125A · 10m (48V)125A · 15m (48V)125A · 20m (48V)125A · 25m (48V)125A · 30m (48V)125A · 35m (48V)125A · 40m (48V)125A · 45m (48V)125A · 50m (48V)125A · 60m (48V)125A · 70m (48V)10A · 500m (48V)16A · 500m (48V)20A · 500m (48V)25A · 500m (48V)32A · 500m (48V)40A · 500m (48V)50A · 500m (48V)63A · 500m (48V)80A · 500m (48V)100A · 500m (48V)160A · 500m (48V)200A · 500m (48V)