475 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 475 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.36V (2.82%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.68V (3.49%)
Voltage at Load46.6 VLine Loss: 643.8 W
Max Power & Breaker22.8 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A 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 | 271.07 V (564.72%) | 0.0 V | 447.13 V (931.53%) | 128756.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 162.64 V (338.83%) | 0.0 V | 268.28 V (558.92%) | 77254.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 101.65 V (211.77%) | 0.0 V | 167.67 V (349.32%) | 48283.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 67.77 V (141.18%) | 0.0 V | 111.78 V (232.88%) | 32189.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 40.66 V (84.71%) | 7.3 V | 67.07 V (139.73%) | 19313.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 25.41 V (52.94%) | 22.6 V | 41.92 V (87.33%) | 12070.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 16.26 V (33.88%) | 31.7 V | 26.83 V (55.89%) | 7725.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 11.62 V (24.2%) | 36.4 V | 19.16 V (39.92%) | 5518.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 8.13 V (16.94%) | 39.9 V | 13.41 V (27.95%) | 3862.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 5.81 V (12.1%) | 42.2 V | 9.58 V (19.96%) | 2759.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.28 V (8.92%) | 43.7 V | 7.06 V (14.71%) | 2033.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.39 V (7.06%) | 44.6 V | 5.59 V (11.64%) | 1609.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.71 V (5.65%) | 45.3 V | 4.47 V (9.32%) | 1287.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.2 V (4.58%) | 45.8 V | 3.63 V (7.55%) | 1044.0 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.69 V (3.53%) | 46.3 V | 2.79 V (5.82%) | 804.7 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.36 V (2.82%) | 46.6 V | 2.24 V (4.66%) | 643.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.02 V (2.12%) | 47.0 V | 1.68 V (3.49%) | 482.8 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 20 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 475A at 20 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 475A over 20m at 48V (voltage drop: 1.36V or 2.82%).
What is the power capacity of 475A at 48V?
At unity power factor, 475A at 48V supports 22.8 kW with a standard 500A circuit breaker.
Related Lengths & Currents (48V)
475A · 5m (48V)475A · 10m (48V)475A · 15m (48V)475A · 25m (48V)475A · 30m (48V)475A · 35m (48V)475A · 40m (48V)475A · 45m (48V)475A · 50m (48V)475A · 60m (48V)475A · 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)