40 Amp Cable Size at 150 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 40 A over 150 m (492.1 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 0.64V (2.67%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.06V (4.41%)
Voltage at Load23.4 VLine Loss: 25.7 W
Max Power & Breaker0.96 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 150m
| 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 | 171.2 V (713.33%) | 0.0 V | 282.4 V (1176.67%) | 6848.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 102.72 V (428.0%) | 0.0 V | 169.44 V (706.0%) | 4108.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 64.2 V (267.5%) | 0.0 V | 105.9 V (441.25%) | 2568.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 42.8 V (178.33%) | 0.0 V | 70.6 V (294.17%) | 1712.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 25.68 V (107.0%) | 0.0 V | 42.36 V (176.5%) | 1027.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 16.05 V (66.88%) | 7.9 V | 26.48 V (110.31%) | 642.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 10.27 V (42.8%) | 13.7 V | 16.94 V (70.6%) | 410.9 W | Drop High |
| 35 mm² | 125 A | 97 A | 7.34 V (30.57%) | 16.7 V | 12.1 V (50.43%) | 293.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 5.14 V (21.4%) | 18.9 V | 8.47 V (35.3%) | 205.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 3.67 V (15.29%) | 20.3 V | 6.05 V (25.21%) | 146.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.7 V (11.26%) | 21.3 V | 4.46 V (18.58%) | 108.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 85.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.71 V (7.13%) | 22.3 V | 2.82 V (11.77%) | 68.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.39 V (5.78%) | 22.6 V | 2.29 V (9.54%) | 55.5 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.07 V (4.46%) | 22.9 V | 1.76 V (7.35%) | 42.8 W | ~ ≤5% |
| 300 mm² | 477 A | 372 A | 0.86 V (3.57%) | 23.1 V | 1.41 V (5.88%) | 34.2 W | ~ ≤5% |
| 400 mm² | 570 A | 445 A | 0.64 V (2.67%) | 23.4 V | 1.06 V (4.41%) | 25.7 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 150 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 40A at 150 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 40A over 150m at 24V (voltage drop: 0.64V or 2.67%).
What is the power capacity of 40A at 24V?
At unity power factor, 40A at 24V supports 0.96 kW with a standard 40A circuit breaker.
Related Lengths & Currents (24V)
40A · 5m (24V)40A · 10m (24V)40A · 15m (24V)40A · 20m (24V)40A · 25m (24V)40A · 30m (24V)40A · 35m (24V)40A · 40m (24V)40A · 45m (24V)40A · 50m (24V)40A · 60m (24V)40A · 70m (24V)10A · 150m (24V)16A · 150m (24V)20A · 150m (24V)25A · 150m (24V)32A · 150m (24V)50A · 150m (24V)63A · 150m (24V)80A · 150m (24V)100A · 150m (24V)125A · 150m (24V)160A · 150m (24V)200A · 150m (24V)