90 Amp Cable Size at 120 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 90 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 1.16V (2.41%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.91V (3.97%)
Voltage at Load46.8 VLine Loss: 104.0 W
Max Power & Breaker4.32 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A at 120m
| 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 | 308.16 V (642.0%) | 0.0 V | 508.32 V (1059.0%) | 27734.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 184.9 V (385.2%) | 0.0 V | 304.99 V (635.4%) | 16640.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 115.56 V (240.75%) | 0.0 V | 190.62 V (397.12%) | 10400.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 77.04 V (160.5%) | 0.0 V | 127.08 V (264.75%) | 6933.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 46.22 V (96.3%) | 1.8 V | 76.25 V (158.85%) | 4160.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 28.89 V (60.19%) | 19.1 V | 47.65 V (99.28%) | 2600.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 18.49 V (38.52%) | 29.5 V | 30.5 V (63.54%) | 1664.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 13.21 V (27.51%) | 34.8 V | 21.79 V (45.39%) | 1188.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 9.24 V (19.26%) | 38.8 V | 15.25 V (31.77%) | 832.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.6 V (13.76%) | 41.4 V | 10.89 V (22.69%) | 594.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.87 V (10.14%) | 43.1 V | 8.03 V (16.72%) | 437.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.85 V (8.03%) | 44.1 V | 6.35 V (13.24%) | 346.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.08 V (6.42%) | 44.9 V | 5.08 V (10.59%) | 277.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.5 V (5.21%) | 45.5 V | 4.12 V (8.59%) | 224.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.93 V (4.01%) | 46.1 V | 3.18 V (6.62%) | 173.3 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 1.54 V (3.21%) | 46.5 V | 2.54 V (5.29%) | 138.7 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 1.16 V (2.41%) | 46.8 V | 1.91 V (3.97%) | 104.0 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 120 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 90A at 120 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 90A over 120m at 48V (voltage drop: 1.16V or 2.41%).
What is the power capacity of 90A at 48V?
At unity power factor, 90A at 48V supports 4.32 kW with a standard 90A circuit breaker.
Related Lengths & Currents (48V)
90A · 5m (48V)90A · 10m (48V)90A · 15m (48V)90A · 20m (48V)90A · 25m (48V)90A · 30m (48V)90A · 35m (48V)90A · 40m (48V)90A · 45m (48V)90A · 50m (48V)90A · 60m (48V)90A · 70m (48V)10A · 120m (48V)16A · 120m (48V)20A · 120m (48V)25A · 120m (48V)32A · 120m (48V)40A · 120m (48V)50A · 120m (48V)63A · 120m (48V)80A · 120m (48V)100A · 120m (48V)125A · 120m (48V)160A · 120m (48V)200A · 120m (48V)