32 Amp Cable Size at 25 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 25 m (82.0 ft).
Copper Cable (≤3% Drop)50 mm²Drop: 0.68V (2.85%)
Aluminum Cable (≤3% Drop)95 mm²Drop: 0.59V (2.48%)
Voltage at Load23.3 VLine Loss: 21.9 W
Max Power & Breaker0.77 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A at 25m
| 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 | 22.83 V (95.11%) | 1.2 V | 37.65 V (156.89%) | 730.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 13.7 V (57.07%) | 10.3 V | 22.59 V (94.13%) | 438.3 W | Drop High |
| 4 mm² | 32 A | 25 A | 8.56 V (35.67%) | 15.4 V | 14.12 V (58.83%) | 273.9 W | Drop High |
| 6 mm² | 41 A | 32 A | 5.71 V (23.78%) | 18.3 V | 9.41 V (39.22%) | 182.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 3.42 V (14.27%) | 20.6 V | 5.65 V (23.53%) | 109.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 68.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 1.37 V (5.71%) | 22.6 V | 2.26 V (9.41%) | 43.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 0.98 V (4.08%) | 23.0 V | 1.61 V (6.72%) | 31.3 W | ~ ≤5% |
| 50 mm² | 151 A | 118 A | 0.68 V (2.85%) | 23.3 V | 1.13 V (4.71%) | 21.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.49 V (2.04%) | 23.5 V | 0.81 V (3.36%) | 15.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.36 V (1.5%) | 23.6 V | 0.59 V (2.48%) | 11.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.29 V (1.19%) | 23.7 V | 0.47 V (1.96%) | 9.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.23 V (0.95%) | 23.8 V | 0.38 V (1.57%) | 7.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.19 V (0.77%) | 23.8 V | 0.31 V (1.27%) | 5.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.14 V (0.59%) | 23.9 V | 0.24 V (0.98%) | 4.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.11 V (0.48%) | 23.9 V | 0.19 V (0.78%) | 3.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.09 V (0.36%) | 23.9 V | 0.14 V (0.59%) | 2.7 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 25 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 32A at 25 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 50 mm² copper cable for 32A over 25m at 24V (voltage drop: 0.68V or 2.85%).
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 · 15m (24V)32A · 20m (24V)32A · 30m (24V)32A · 35m (24V)32A · 40m (24V)32A · 45m (24V)32A · 50m (24V)32A · 60m (24V)32A · 70m (24V)10A · 25m (24V)16A · 25m (24V)20A · 25m (24V)25A · 25m (24V)40A · 25m (24V)50A · 25m (24V)63A · 25m (24V)80A · 25m (24V)100A · 25m (24V)125A · 25m (24V)160A · 25m (24V)200A · 25m (24V)