5 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 0.6V (2.51%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 0.64V (2.65%)
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 45m
| 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 | 6.42 V (26.75%) | 17.6 V | 10.59 V (44.12%) | 32.1 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 3.85 V (16.05%) | 20.1 V | 6.35 V (26.47%) | 19.3 W | Drop High |
| 4 mm² | 32 A | 25 A | 2.41 V (10.03%) | 21.6 V | 3.97 V (16.55%) | 12.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1.6 V (6.69%) | 22.4 V | 2.65 V (11.03%) | 8.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 0.96 V (4.01%) | 23.0 V | 1.59 V (6.62%) | 4.8 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 0.6 V (2.51%) | 23.4 V | 0.99 V (4.14%) | 3.0 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.39 V (1.6%) | 23.6 V | 0.64 V (2.65%) | 1.9 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.28 V (1.15%) | 23.7 V | 0.45 V (1.89%) | 1.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.19 V (0.8%) | 23.8 V | 0.32 V (1.32%) | 1.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.14 V (0.57%) | 23.9 V | 0.23 V (0.95%) | 0.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.1 V (0.42%) | 23.9 V | 0.17 V (0.7%) | 0.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.08 V (0.33%) | 23.9 V | 0.13 V (0.55%) | 0.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.06 V (0.27%) | 23.9 V | 0.11 V (0.44%) | 0.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.05 V (0.22%) | 23.9 V | 0.09 V (0.36%) | 0.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.04 V (0.17%) | 24.0 V | 0.07 V (0.28%) | 0.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.03 V (0.13%) | 24.0 V | 0.05 V (0.22%) | 0.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.02 V (0.1%) | 24.0 V | 0.04 V (0.17%) | 0.1 W | ✓ OK (≤3%) |
FAQ — 5 Amp Cable Size at 45 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 5A at 45 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 5A over 45m at 24V (voltage drop: 0.6V or 2.51%).
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 · 50m (24V)5A · 60m (24V)5A · 70m (24V)10A · 45m (24V)16A · 45m (24V)20A · 45m (24V)25A · 45m (24V)32A · 45m (24V)40A · 45m (24V)50A · 45m (24V)63A · 45m (24V)80A · 45m (24V)100A · 45m (24V)125A · 45m (24V)160A · 45m (24V)200A · 45m (24V)