15 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 15 A over 30 m (98.4 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 0.55V (2.29%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 0.64V (2.65%)
Voltage at Load23.4 VLine Loss: 8.3 W
Max Power & Breaker0.36 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A at 30m
| 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 | 12.84 V (53.5%) | 11.2 V | 21.18 V (88.25%) | 192.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 7.7 V (32.1%) | 16.3 V | 12.71 V (52.95%) | 115.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 4.82 V (20.06%) | 19.2 V | 7.94 V (33.09%) | 72.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 3.21 V (13.38%) | 20.8 V | 5.29 V (22.06%) | 48.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 1.93 V (8.03%) | 22.1 V | 3.18 V (13.24%) | 28.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 1.2 V (5.02%) | 22.8 V | 1.99 V (8.27%) | 18.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 0.77 V (3.21%) | 23.2 V | 1.27 V (5.29%) | 11.6 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 0.55 V (2.29%) | 23.4 V | 0.91 V (3.78%) | 8.3 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.39 V (1.61%) | 23.6 V | 0.64 V (2.65%) | 5.8 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.28 V (1.15%) | 23.7 V | 0.45 V (1.89%) | 4.1 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.2 V (0.84%) | 23.8 V | 0.33 V (1.39%) | 3.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.16 V (0.67%) | 23.8 V | 0.26 V (1.1%) | 2.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.13 V (0.53%) | 23.9 V | 0.21 V (0.88%) | 1.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.1 V (0.43%) | 23.9 V | 0.17 V (0.72%) | 1.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.08 V (0.33%) | 23.9 V | 0.13 V (0.55%) | 1.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.06 V (0.27%) | 23.9 V | 0.11 V (0.44%) | 1.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.05 V (0.2%) | 24.0 V | 0.08 V (0.33%) | 0.7 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 30 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 15A at 30 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 15A over 30m at 24V (voltage drop: 0.55V or 2.29%).
What is the power capacity of 15A at 24V?
At unity power factor, 15A at 24V supports 0.36 kW with a standard 15A circuit breaker.
Related Lengths & Currents (24V)
15A · 5m (24V)15A · 10m (24V)15A · 15m (24V)15A · 20m (24V)15A · 25m (24V)15A · 35m (24V)15A · 40m (24V)15A · 45m (24V)15A · 50m (24V)15A · 60m (24V)15A · 70m (24V)10A · 30m (24V)16A · 30m (24V)20A · 30m (24V)25A · 30m (24V)32A · 30m (24V)40A · 30m (24V)50A · 30m (24V)63A · 30m (24V)80A · 30m (24V)100A · 30m (24V)125A · 30m (24V)160A · 30m (24V)200A · 30m (24V)