20 Amp Cable Size at 175 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 20 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)240 mm²Drop: 0.62V (2.6%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.62V (2.57%)
Voltage at Load23.4 VLine Loss: 12.5 W
Max Power & Breaker0.48 kW20A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 20A at 175m
| 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 | 99.87 V (416.11%) | 0.0 V | 164.73 V (686.39%) | 1997.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 59.92 V (249.67%) | 0.0 V | 98.84 V (411.83%) | 1198.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 37.45 V (156.04%) | 0.0 V | 61.77 V (257.4%) | 749.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 24.97 V (104.03%) | 0.0 V | 41.18 V (171.6%) | 499.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 14.98 V (62.42%) | 9.0 V | 24.71 V (102.96%) | 299.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 9.36 V (39.01%) | 14.6 V | 15.44 V (64.35%) | 187.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 5.99 V (24.97%) | 18.0 V | 9.88 V (41.18%) | 119.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 4.28 V (17.83%) | 19.7 V | 7.06 V (29.42%) | 85.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 3.0 V (12.48%) | 21.0 V | 4.94 V (20.59%) | 59.9 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.14 V (8.92%) | 21.9 V | 3.53 V (14.71%) | 42.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.58 V (6.57%) | 22.4 V | 2.6 V (10.84%) | 31.5 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.25 V (5.2%) | 22.8 V | 2.06 V (8.58%) | 25.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.0 V (4.16%) | 23.0 V | 1.65 V (6.86%) | 20.0 W | ~ ≤5% |
| 185 mm² | 353 A | 275 A | 0.81 V (3.37%) | 23.2 V | 1.34 V (5.57%) | 16.2 W | ~ ≤5% |
| 240 mm² | 415 A | 324 A | 0.62 V (2.6%) | 23.4 V | 1.03 V (4.29%) | 12.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.5 V (2.08%) | 23.5 V | 0.82 V (3.43%) | 10.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.37 V (1.56%) | 23.6 V | 0.62 V (2.57%) | 7.5 W | ✓ OK (≤3%) |
FAQ — 20 Amp Cable Size at 175 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 20A at 175 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 240 mm² copper cable for 20A over 175m at 24V (voltage drop: 0.62V or 2.6%).
What is the power capacity of 20A at 24V?
At unity power factor, 20A at 24V supports 0.48 kW with a standard 20A circuit breaker.
Related Lengths & Currents (24V)
20A · 5m (24V)20A · 10m (24V)20A · 15m (24V)20A · 20m (24V)20A · 25m (24V)20A · 30m (24V)20A · 35m (24V)20A · 40m (24V)20A · 45m (24V)20A · 50m (24V)20A · 60m (24V)20A · 70m (24V)10A · 175m (24V)16A · 175m (24V)25A · 175m (24V)32A · 175m (24V)40A · 175m (24V)50A · 175m (24V)63A · 175m (24V)80A · 175m (24V)100A · 175m (24V)125A · 175m (24V)160A · 175m (24V)200A · 175m (24V)