20 Amp Cable Size at 175 Meters (690V Three-Phase (Wind / Heavy Industrial))
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)10 mm²Drop: 12.97V (1.88%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 13.37V (1.94%)
Voltage at Load677.0 VLine Loss: 449.4 W
Max Power & Breaker23.9 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 | 86.49 V (12.53%) | 603.5 V | 142.66 V (20.68%) | 2996.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 51.89 V (7.52%) | 638.1 V | 85.6 V (12.41%) | 1797.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 32.43 V (4.7%) | 657.6 V | 53.5 V (7.75%) | 1123.5 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 21.62 V (3.13%) | 668.4 V | 35.67 V (5.17%) | 749.0 W | ~ ≤5% |
| 10 mm² | 57 A | 44 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 449.4 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 8.11 V (1.18%) | 681.9 V | 13.37 V (1.94%) | 280.9 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 5.19 V (0.75%) | 684.8 V | 8.56 V (1.24%) | 179.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 3.71 V (0.54%) | 686.3 V | 6.11 V (0.89%) | 128.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 2.59 V (0.38%) | 687.4 V | 4.28 V (0.62%) | 89.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.85 V (0.27%) | 688.1 V | 3.06 V (0.44%) | 64.2 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.37 V (0.2%) | 688.6 V | 2.25 V (0.33%) | 47.3 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.08 V (0.16%) | 688.9 V | 1.78 V (0.26%) | 37.4 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.86 V (0.13%) | 689.1 V | 1.43 V (0.21%) | 30.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.7 V (0.1%) | 689.3 V | 1.16 V (0.17%) | 24.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.54 V (0.08%) | 689.5 V | 0.89 V (0.13%) | 18.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.43 V (0.06%) | 689.6 V | 0.71 V (0.1%) | 15.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.32 V (0.05%) | 689.7 V | 0.53 V (0.08%) | 11.2 W | ✓ OK (≤3%) |
FAQ — 20 Amp Cable Size at 175 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 20A at 175 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 20A over 175m at 690V (voltage drop: 12.97V or 1.88%).
What is the power capacity of 20A at 690V?
At unity power factor, 20A at 690V supports 23.9 kW with a standard 20A circuit breaker.
Related Lengths & Currents (690V)
20A · 5m (690V)20A · 10m (690V)20A · 15m (690V)20A · 20m (690V)20A · 25m (690V)20A · 30m (690V)20A · 35m (690V)20A · 40m (690V)20A · 45m (690V)20A · 50m (690V)20A · 60m (690V)20A · 70m (690V)10A · 175m (690V)16A · 175m (690V)25A · 175m (690V)32A · 175m (690V)40A · 175m (690V)50A · 175m (690V)63A · 175m (690V)80A · 175m (690V)100A · 175m (690V)125A · 175m (690V)160A · 175m (690V)200A · 175m (690V)