325 Amp Cable Size at 20 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 325 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 1.16V (2.41%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.15V (2.39%)
Voltage at Load46.8 VLine Loss: 376.7 W
Max Power & Breaker15.6 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 20m
| 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 | 185.47 V (386.39%) | 0.0 V | 305.93 V (637.36%) | 60276.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 111.28 V (231.83%) | 0.0 V | 183.56 V (382.42%) | 36166.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 69.55 V (144.9%) | 0.0 V | 114.72 V (239.01%) | 22603.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 46.37 V (96.6%) | 1.6 V | 76.48 V (159.34%) | 15069.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 27.82 V (57.96%) | 20.2 V | 45.89 V (95.6%) | 9041.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 17.39 V (36.22%) | 30.6 V | 28.68 V (59.75%) | 5650.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 11.13 V (23.18%) | 36.9 V | 18.36 V (38.24%) | 3616.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 7.95 V (16.56%) | 40.1 V | 13.11 V (27.32%) | 2583.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 5.56 V (11.59%) | 42.4 V | 9.18 V (19.12%) | 1808.3 W | Drop High |
| 70 mm² | 192 A | 150 A | 3.97 V (8.28%) | 44.0 V | 6.56 V (13.66%) | 1291.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.93 V (6.1%) | 45.1 V | 4.83 V (10.06%) | 951.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.32 V (4.83%) | 45.7 V | 3.82 V (7.97%) | 753.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.85 V (3.86%) | 46.1 V | 3.06 V (6.37%) | 602.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.5 V (3.13%) | 46.5 V | 2.48 V (5.17%) | 488.7 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 1.16 V (2.41%) | 46.8 V | 1.91 V (3.98%) | 376.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.93 V (1.93%) | 47.1 V | 1.53 V (3.19%) | 301.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.7 V (1.45%) | 47.3 V | 1.15 V (2.39%) | 226.0 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 20 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 325A at 20 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 325A over 20m at 48V (voltage drop: 1.16V or 2.41%).
What is the power capacity of 325A at 48V?
At unity power factor, 325A at 48V supports 15.6 kW with a standard 350A circuit breaker.
Related Lengths & Currents (48V)
325A · 5m (48V)325A · 10m (48V)325A · 15m (48V)325A · 25m (48V)325A · 30m (48V)325A · 35m (48V)325A · 40m (48V)325A · 45m (48V)325A · 50m (48V)325A · 60m (48V)325A · 70m (48V)10A · 20m (48V)16A · 20m (48V)20A · 20m (48V)25A · 20m (48V)32A · 20m (48V)40A · 20m (48V)50A · 20m (48V)63A · 20m (48V)80A · 20m (48V)100A · 20m (48V)125A · 20m (48V)160A · 20m (48V)200A · 20m (48V)