5 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 5 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 0.6V (2.5%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 0.71V (2.94%)
Voltage at Load23.4 VLine Loss: 3.0 W
Max Power & Breaker0.12 kW6A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 5A 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 | 9.99 V (41.61%) | 14.0 V | 16.47 V (68.64%) | 49.9 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 5.99 V (24.97%) | 18.0 V | 9.88 V (41.18%) | 30.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 3.75 V (15.6%) | 20.3 V | 6.18 V (25.74%) | 18.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 2.5 V (10.4%) | 21.5 V | 4.12 V (17.16%) | 12.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 1.5 V (6.24%) | 22.5 V | 2.47 V (10.3%) | 7.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 0.94 V (3.9%) | 23.1 V | 1.54 V (6.43%) | 4.7 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 0.6 V (2.5%) | 23.4 V | 0.99 V (4.12%) | 3.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.43 V (1.78%) | 23.6 V | 0.71 V (2.94%) | 2.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.3 V (1.25%) | 23.7 V | 0.49 V (2.06%) | 1.5 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.21 V (0.89%) | 23.8 V | 0.35 V (1.47%) | 1.1 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.16 V (0.66%) | 23.8 V | 0.26 V (1.08%) | 0.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.12 V (0.52%) | 23.9 V | 0.21 V (0.86%) | 0.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.1 V (0.42%) | 23.9 V | 0.16 V (0.69%) | 0.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.08 V (0.34%) | 23.9 V | 0.13 V (0.56%) | 0.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.06 V (0.26%) | 23.9 V | 0.1 V (0.43%) | 0.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.05 V (0.21%) | 24.0 V | 0.08 V (0.34%) | 0.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.04 V (0.16%) | 24.0 V | 0.06 V (0.26%) | 0.2 W | ✓ OK (≤3%) |
FAQ — 5 Amp Cable Size at 70 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 5A at 70 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 5A over 70m at 24V (voltage drop: 0.6V or 2.5%).
What is the power capacity of 5A at 24V?
At unity power factor, 5A at 24V supports 0.12 kW with a standard 6A circuit breaker.
Related Lengths & Currents (24V)
5A · 5m (24V)5A · 10m (24V)5A · 15m (24V)5A · 20m (24V)5A · 25m (24V)5A · 30m (24V)5A · 35m (24V)5A · 40m (24V)5A · 45m (24V)5A · 50m (24V)5A · 60m (24V)10A · 70m (24V)16A · 70m (24V)20A · 70m (24V)25A · 70m (24V)32A · 70m (24V)40A · 70m (24V)50A · 70m (24V)63A · 70m (24V)80A · 70m (24V)100A · 70m (24V)125A · 70m (24V)160A · 70m (24V)200A · 70m (24V)