40 Amp Cable Size at 90 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 90 m (295.3 ft).
Copper Cable (≤3% Drop)120 mm²Drop: 1.28V (2.67%)
Aluminum Cable (≤3% Drop)185 mm²Drop: 1.37V (2.86%)
Voltage at Load46.7 VLine Loss: 51.4 W
Max Power & Breaker1.92 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 90m
| 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 | 102.72 V (214.0%) | 0.0 V | 169.44 V (353.0%) | 4108.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 61.63 V (128.4%) | 0.0 V | 101.66 V (211.8%) | 2465.3 W | Drop High |
| 4 mm² | 32 A | 25 A | 38.52 V (80.25%) | 9.5 V | 63.54 V (132.37%) | 1540.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 25.68 V (53.5%) | 22.3 V | 42.36 V (88.25%) | 1027.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 15.41 V (32.1%) | 32.6 V | 25.42 V (52.95%) | 616.3 W | Drop High |
| 16 mm² | 76 A | 59 A | 9.63 V (20.06%) | 38.4 V | 15.88 V (33.09%) | 385.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 6.16 V (12.84%) | 41.8 V | 10.17 V (21.18%) | 246.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 4.4 V (9.17%) | 43.6 V | 7.26 V (15.13%) | 176.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 3.08 V (6.42%) | 44.9 V | 5.08 V (10.59%) | 123.3 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.2 V (4.59%) | 45.8 V | 3.63 V (7.56%) | 88.0 W | ~ ≤5% |
| 95 mm² | 232 A | 181 A | 1.62 V (3.38%) | 46.4 V | 2.68 V (5.57%) | 64.9 W | ~ ≤5% |
| 120 mm² | 269 A | 210 A | 1.28 V (2.67%) | 46.7 V | 2.12 V (4.41%) | 51.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.03 V (2.14%) | 47.0 V | 1.69 V (3.53%) | 41.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.83 V (1.74%) | 47.2 V | 1.37 V (2.86%) | 33.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.64 V (1.34%) | 47.4 V | 1.06 V (2.21%) | 25.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.51 V (1.07%) | 47.5 V | 0.85 V (1.76%) | 20.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.39 V (0.8%) | 47.6 V | 0.64 V (1.32%) | 15.4 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 90 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 40A at 90 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 120 mm² copper cable for 40A over 90m at 48V (voltage drop: 1.28V or 2.67%).
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 · 90m (48V)16A · 90m (48V)20A · 90m (48V)25A · 90m (48V)32A · 90m (48V)50A · 90m (48V)63A · 90m (48V)80A · 90m (48V)100A · 90m (48V)125A · 90m (48V)160A · 90m (48V)200A · 90m (48V)