300 Amp Cable Size at 70 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 1.12V (2.34%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.71V (7.72%)
Voltage at Load46.9 VLine Loss: 337.1 W
Max Power & Breaker14.4 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 70m
| 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 | 599.2 V (1248.33%) | 0.0 V | 988.4 V (2059.17%) | 179760.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 359.52 V (749.0%) | 0.0 V | 593.04 V (1235.5%) | 107856.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 224.7 V (468.12%) | 0.0 V | 370.65 V (772.19%) | 67410.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 149.8 V (312.08%) | 0.0 V | 247.1 V (514.79%) | 44940.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 89.88 V (187.25%) | 0.0 V | 148.26 V (308.88%) | 26964.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 56.17 V (117.03%) | 0.0 V | 92.66 V (193.05%) | 16852.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 35.95 V (74.9%) | 12.0 V | 59.3 V (123.55%) | 10785.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 25.68 V (53.5%) | 22.3 V | 42.36 V (88.25%) | 7704.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 17.98 V (37.45%) | 30.0 V | 29.65 V (61.77%) | 5392.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 12.84 V (26.75%) | 35.2 V | 21.18 V (44.12%) | 3852.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 9.46 V (19.71%) | 38.5 V | 15.61 V (32.51%) | 2838.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 7.49 V (15.6%) | 40.5 V | 12.36 V (25.74%) | 2247.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.99 V (12.48%) | 42.0 V | 9.88 V (20.59%) | 1797.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.86 V (10.12%) | 43.1 V | 8.01 V (16.7%) | 1457.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.75 V (7.8%) | 44.3 V | 6.18 V (12.87%) | 1123.5 W | Drop High |
| 300 mm² | 477 A | 372 A | 3.0 V (6.24%) | 45.0 V | 4.94 V (10.3%) | 898.8 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.25 V (4.68%) | 45.8 V | 3.71 V (7.72%) | 674.1 W | ~ ≤5% |
FAQ — 300 Amp Cable Size at 70 Meters (48V DC (LiFePO4 Battery Bank / Telecom))
What mm² cable size is required for 300A at 70 meters (48V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 300A over 70m at 48V (voltage drop: 1.12V or 2.34%).
What is the power capacity of 300A at 48V?
At unity power factor, 300A at 48V supports 14.4 kW with a standard 300A circuit breaker.
Related Lengths & Currents (48V)
300A · 5m (48V)300A · 10m (48V)300A · 15m (48V)300A · 20m (48V)300A · 25m (48V)300A · 30m (48V)300A · 35m (48V)300A · 40m (48V)300A · 45m (48V)300A · 50m (48V)300A · 60m (48V)10A · 70m (48V)16A · 70m (48V)20A · 70m (48V)25A · 70m (48V)32A · 70m (48V)40A · 70m (48V)50A · 70m (48V)63A · 70m (48V)80A · 70m (48V)100A · 70m (48V)125A · 70m (48V)160A · 70m (48V)200A · 70m (48V)