32 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 0.68V (2.85%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.68V (2.82%)
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 120m
| 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 | 109.57 V (456.53%) | 0.0 V | 180.74 V (753.07%) | 3506.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 65.74 V (273.92%) | 0.0 V | 108.44 V (451.84%) | 2103.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 41.09 V (171.2%) | 0.0 V | 67.78 V (282.4%) | 1314.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 27.39 V (114.13%) | 0.0 V | 45.18 V (188.27%) | 876.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 16.44 V (68.48%) | 7.6 V | 27.11 V (112.96%) | 525.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 10.27 V (42.8%) | 13.7 V | 16.94 V (70.6%) | 328.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 6.57 V (27.39%) | 17.4 V | 10.84 V (45.18%) | 210.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 4.7 V (19.57%) | 19.3 V | 7.75 V (32.27%) | 150.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 3.29 V (13.7%) | 20.7 V | 5.42 V (22.59%) | 105.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.35 V (9.78%) | 21.7 V | 3.87 V (16.14%) | 75.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.73 V (7.21%) | 22.3 V | 2.85 V (11.89%) | 55.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.37 V (5.71%) | 22.6 V | 2.26 V (9.41%) | 43.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.1 V (4.57%) | 22.9 V | 1.81 V (7.53%) | 35.1 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 0.89 V (3.7%) | 23.1 V | 1.47 V (6.11%) | 28.4 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 0.68 V (2.85%) | 23.3 V | 1.13 V (4.71%) | 21.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.55 V (2.28%) | 23.5 V | 0.9 V (3.77%) | 17.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.41 V (1.71%) | 23.6 V | 0.68 V (2.82%) | 13.1 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 120 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 32A at 120 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 32A over 120m 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 · 25m (24V)32A · 30m (24V)32A · 35m (24V)32A · 40m (24V)32A · 45m (24V)32A · 50m (24V)32A · 60m (24V)32A · 70m (24V)10A · 120m (24V)16A · 120m (24V)20A · 120m (24V)25A · 120m (24V)40A · 120m (24V)50A · 120m (24V)63A · 120m (24V)80A · 120m (24V)100A · 120m (24V)125A · 120m (24V)160A · 120m (24V)200A · 120m (24V)