100 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 100 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)70 mm²Drop: 1.22V (2.55%)
Aluminum Cable (≤3% Drop)120 mm²Drop: 1.18V (2.45%)
Voltage at Load46.8 VLine Loss: 122.3 W
Max Power & Breaker4.8 kW100A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 100A 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 | 57.07 V (118.89%) | 0.0 V | 94.13 V (196.11%) | 5706.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 34.24 V (71.33%) | 13.8 V | 56.48 V (117.67%) | 3424.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 21.4 V (44.58%) | 26.6 V | 35.3 V (73.54%) | 2140.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 14.27 V (29.72%) | 33.7 V | 23.53 V (49.03%) | 1426.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 8.56 V (17.83%) | 39.4 V | 14.12 V (29.42%) | 856.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 5.35 V (11.15%) | 42.6 V | 8.82 V (18.39%) | 535.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.42 V (7.13%) | 44.6 V | 5.65 V (11.77%) | 342.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 2.45 V (5.1%) | 45.6 V | 4.03 V (8.4%) | 244.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.71 V (3.57%) | 46.3 V | 2.82 V (5.88%) | 171.2 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 1.22 V (2.55%) | 46.8 V | 2.02 V (4.2%) | 122.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.9 V (1.88%) | 47.1 V | 1.49 V (3.1%) | 90.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.71 V (1.49%) | 47.3 V | 1.18 V (2.45%) | 71.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.57 V (1.19%) | 47.4 V | 0.94 V (1.96%) | 57.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.46 V (0.96%) | 47.5 V | 0.76 V (1.59%) | 46.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.36 V (0.74%) | 47.6 V | 0.59 V (1.23%) | 35.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.29 V (0.59%) | 47.7 V | 0.47 V (0.98%) | 28.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.21 V (0.45%) | 47.8 V | 0.35 V (0.74%) | 21.4 W | ✓ OK (≤3%) |
FAQ — 100 Amp Cable Size at 20 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 100A at 20 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 70 mm² copper cable for 100A over 20m at 48V (voltage drop: 1.22V or 2.55%).
What is the power capacity of 100A at 48V?
At unity power factor, 100A at 48V supports 4.8 kW with a standard 100A circuit breaker.
Related Lengths & Currents (48V)
100A · 5m (48V)100A · 10m (48V)100A · 15m (48V)100A · 25m (48V)100A · 30m (48V)100A · 35m (48V)100A · 40m (48V)100A · 45m (48V)100A · 50m (48V)100A · 60m (48V)100A · 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)125A · 20m (48V)160A · 20m (48V)200A · 20m (48V)