125 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 125 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)70 mm²Drop: 11.58V (2.79%)
Aluminum Cable (≤3% Drop)120 mm²Drop: 11.15V (2.69%)
Voltage at Load403.4 VLine Loss: 2507.8 W
Max Power & Breaker89.85 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A 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 | 540.54 V (130.25%) | 0.0 V | 891.65 V (214.85%) | 117031.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 324.33 V (78.15%) | 90.7 V | 534.99 V (128.91%) | 70218.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 202.7 V (48.84%) | 212.3 V | 334.37 V (80.57%) | 43886.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 135.14 V (32.56%) | 279.9 V | 222.91 V (53.71%) | 29257.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 81.08 V (19.54%) | 333.9 V | 133.75 V (32.23%) | 17554.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 50.68 V (12.21%) | 364.3 V | 83.59 V (20.14%) | 10971.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 32.43 V (7.82%) | 382.6 V | 53.5 V (12.89%) | 7021.9 W | Drop High |
| 35 mm² | 125 A | 97 A | 23.17 V (5.58%) | 391.8 V | 38.21 V (9.21%) | 5015.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 16.22 V (3.91%) | 398.8 V | 26.75 V (6.45%) | 3510.9 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 11.58 V (2.79%) | 403.4 V | 19.11 V (4.6%) | 2507.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 8.53 V (2.06%) | 406.5 V | 14.08 V (3.39%) | 1847.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 6.76 V (1.63%) | 408.2 V | 11.15 V (2.69%) | 1462.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 5.41 V (1.3%) | 409.6 V | 8.92 V (2.15%) | 1170.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.38 V (1.06%) | 410.6 V | 7.23 V (1.74%) | 948.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.38 V (0.81%) | 411.6 V | 5.57 V (1.34%) | 731.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.7 V (0.65%) | 412.3 V | 4.46 V (1.07%) | 585.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.03 V (0.49%) | 413.0 V | 3.34 V (0.81%) | 438.9 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 175 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 125A at 175 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 70 mm² copper cable for 125A over 175m at 415V (voltage drop: 11.58V or 2.79%).
What is the power capacity of 125A at 415V?
At unity power factor, 125A at 415V supports 89.85 kW with a standard 125A circuit breaker.
Related Lengths & Currents (415V)
125A · 5m (415V)125A · 10m (415V)125A · 15m (415V)125A · 20m (415V)125A · 25m (415V)125A · 30m (415V)125A · 35m (415V)125A · 40m (415V)125A · 45m (415V)125A · 50m (415V)125A · 60m (415V)125A · 70m (415V)10A · 175m (415V)16A · 175m (415V)20A · 175m (415V)25A · 175m (415V)32A · 175m (415V)40A · 175m (415V)50A · 175m (415V)63A · 175m (415V)80A · 175m (415V)100A · 175m (415V)160A · 175m (415V)200A · 175m (415V)