25 Amp Cable Size at 175 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 10.14V (2.44%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 10.7V (2.58%)
Voltage at Load404.9 VLine Loss: 438.9 W
Max Power & Breaker17.97 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A 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 | 108.11 V (26.05%) | 306.9 V | 178.33 V (42.97%) | 4681.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 64.87 V (15.63%) | 350.1 V | 107.0 V (25.78%) | 2808.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 40.54 V (9.77%) | 374.5 V | 66.87 V (16.11%) | 1755.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 27.03 V (6.51%) | 388.0 V | 44.58 V (10.74%) | 1170.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 16.22 V (3.91%) | 398.8 V | 26.75 V (6.45%) | 702.2 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 10.14 V (2.44%) | 404.9 V | 16.72 V (4.03%) | 438.9 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 6.49 V (1.56%) | 408.5 V | 10.7 V (2.58%) | 280.9 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 4.63 V (1.12%) | 410.4 V | 7.64 V (1.84%) | 200.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.24 V (0.78%) | 411.8 V | 5.35 V (1.29%) | 140.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.32 V (0.56%) | 412.7 V | 3.82 V (0.92%) | 100.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.71 V (0.41%) | 413.3 V | 2.82 V (0.68%) | 73.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.35 V (0.33%) | 413.6 V | 2.23 V (0.54%) | 58.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.08 V (0.26%) | 413.9 V | 1.78 V (0.43%) | 46.8 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.88 V (0.21%) | 414.1 V | 1.45 V (0.35%) | 38.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.68 V (0.16%) | 414.3 V | 1.11 V (0.27%) | 29.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.54 V (0.13%) | 414.5 V | 0.89 V (0.21%) | 23.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.41 V (0.1%) | 414.6 V | 0.67 V (0.16%) | 17.6 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 175 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 25A at 175 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 25A over 175m at 415V (voltage drop: 10.14V or 2.44%).
What is the power capacity of 25A at 415V?
At unity power factor, 25A at 415V supports 17.97 kW with a standard 25A circuit breaker.
Related Lengths & Currents (415V)
25A · 5m (415V)25A · 10m (415V)25A · 15m (415V)25A · 20m (415V)25A · 25m (415V)25A · 30m (415V)25A · 35m (415V)25A · 40m (415V)25A · 45m (415V)25A · 50m (415V)25A · 60m (415V)25A · 70m (415V)10A · 175m (415V)16A · 175m (415V)20A · 175m (415V)32A · 175m (415V)40A · 175m (415V)50A · 175m (415V)63A · 175m (415V)80A · 175m (415V)100A · 175m (415V)125A · 175m (415V)160A · 175m (415V)200A · 175m (415V)