32 Amp Cable Size at 40 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 40 m (131.2 ft).
Copper Cable (≤3% Drop)95 mm²Drop: 0.58V (2.4%)
Aluminum Cable (≤3% Drop)150 mm²Drop: 0.6V (2.51%)
Voltage at Load23.4 VLine Loss: 18.5 W
Max Power & Breaker0.77 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A at 40m
| 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 | 36.52 V (152.18%) | 0.0 V | 60.25 V (251.02%) | 1168.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 21.91 V (91.31%) | 2.1 V | 36.15 V (150.61%) | 701.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 13.7 V (57.07%) | 10.3 V | 22.59 V (94.13%) | 438.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 9.13 V (38.04%) | 14.9 V | 15.06 V (62.76%) | 292.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.48 V (22.83%) | 18.5 V | 9.04 V (37.65%) | 175.3 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.42 V (14.27%) | 20.6 V | 5.65 V (23.53%) | 109.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 2.19 V (9.13%) | 21.8 V | 3.61 V (15.06%) | 70.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.57 V (6.52%) | 22.4 V | 2.58 V (10.76%) | 50.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.1 V (4.57%) | 22.9 V | 1.81 V (7.53%) | 35.1 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 0.78 V (3.26%) | 23.2 V | 1.29 V (5.38%) | 25.0 W | ~ ≤5% |
| 95 mm² | 232 A | 181 A | 0.58 V (2.4%) | 23.4 V | 0.95 V (3.96%) | 18.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.46 V (1.9%) | 23.5 V | 0.75 V (3.14%) | 14.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.37 V (1.52%) | 23.6 V | 0.6 V (2.51%) | 11.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.3 V (1.23%) | 23.7 V | 0.49 V (2.04%) | 9.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.23 V (0.95%) | 23.8 V | 0.38 V (1.57%) | 7.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.18 V (0.76%) | 23.8 V | 0.3 V (1.26%) | 5.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.14 V (0.57%) | 23.9 V | 0.23 V (0.94%) | 4.4 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 40 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 32A at 40 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 95 mm² copper cable for 32A over 40m at 24V (voltage drop: 0.58V or 2.4%).
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 · 25m (24V)32A · 30m (24V)32A · 35m (24V)32A · 45m (24V)32A · 50m (24V)32A · 60m (24V)32A · 70m (24V)10A · 40m (24V)16A · 40m (24V)20A · 40m (24V)25A · 40m (24V)40A · 40m (24V)50A · 40m (24V)63A · 40m (24V)80A · 40m (24V)100A · 40m (24V)125A · 40m (24V)160A · 40m (24V)200A · 40m (24V)