32 Amp Cable Size at 15 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 32 A over 15 m (49.2 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 0.59V (2.45%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 0.68V (2.82%)
Voltage at Load23.4 VLine Loss: 18.8 W
Max Power & Breaker0.77 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A at 15m
| 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 | 13.7 V (57.07%) | 10.3 V | 22.59 V (94.13%) | 438.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 8.22 V (34.24%) | 15.8 V | 13.56 V (56.48%) | 263.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 5.14 V (21.4%) | 18.9 V | 8.47 V (35.3%) | 164.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 3.42 V (14.27%) | 20.6 V | 5.65 V (23.53%) | 109.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 2.05 V (8.56%) | 21.9 V | 3.39 V (14.12%) | 65.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 1.28 V (5.35%) | 22.7 V | 2.12 V (8.82%) | 41.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 0.82 V (3.42%) | 23.2 V | 1.36 V (5.65%) | 26.3 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 0.59 V (2.45%) | 23.4 V | 0.97 V (4.03%) | 18.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.41 V (1.71%) | 23.6 V | 0.68 V (2.82%) | 13.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.29 V (1.22%) | 23.7 V | 0.48 V (2.02%) | 9.4 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.22 V (0.9%) | 23.8 V | 0.36 V (1.49%) | 6.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.17 V (0.71%) | 23.8 V | 0.28 V (1.18%) | 5.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.14 V (0.57%) | 23.9 V | 0.23 V (0.94%) | 4.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.11 V (0.46%) | 23.9 V | 0.18 V (0.76%) | 3.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.09 V (0.36%) | 23.9 V | 0.14 V (0.59%) | 2.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.07 V (0.29%) | 23.9 V | 0.11 V (0.47%) | 2.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.05 V (0.21%) | 23.9 V | 0.08 V (0.35%) | 1.6 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 15 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 32A at 15 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 32A over 15m at 24V (voltage drop: 0.59V or 2.45%).
What is the power capacity of 32A at 24V?
At unity power factor, 32A at 24V supports 0.77 kW with a standard 32A circuit breaker.
Related Lengths & Currents (24V)
32A · 5m (24V)32A · 10m (24V)32A · 20m (24V)32A · 25m (24V)32A · 30m (24V)32A · 35m (24V)32A · 40m (24V)32A · 45m (24V)32A · 50m (24V)32A · 60m (24V)32A · 70m (24V)10A · 15m (24V)16A · 15m (24V)20A · 15m (24V)25A · 15m (24V)40A · 15m (24V)50A · 15m (24V)63A · 15m (24V)80A · 15m (24V)100A · 15m (24V)125A · 15m (24V)160A · 15m (24V)200A · 15m (24V)