125 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 125 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)50 mm²Drop: 16.22V (2.35%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 19.11V (2.77%)
Voltage at Load673.8 VLine Loss: 3510.9 W
Max Power & Breaker149.39 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 (78.34%) | 149.5 V | 891.65 V (129.22%) | 117031.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 324.33 V (47.0%) | 365.7 V | 534.99 V (77.53%) | 70218.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 202.7 V (29.38%) | 487.3 V | 334.37 V (48.46%) | 43886.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 135.14 V (19.58%) | 554.9 V | 222.91 V (32.31%) | 29257.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 81.08 V (11.75%) | 608.9 V | 133.75 V (19.38%) | 17554.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 50.68 V (7.34%) | 639.3 V | 83.59 V (12.11%) | 10971.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 32.43 V (4.7%) | 657.6 V | 53.5 V (7.75%) | 7021.9 W | Drop High |
| 35 mm² | 125 A | 97 A | 23.17 V (3.36%) | 666.8 V | 38.21 V (5.54%) | 5015.6 W | ~ ≤5% |
| 50 mm² | 151 A | 118 A | 16.22 V (2.35%) | 673.8 V | 26.75 V (3.88%) | 3510.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 11.58 V (1.68%) | 678.4 V | 19.11 V (2.77%) | 2507.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 8.53 V (1.24%) | 681.5 V | 14.08 V (2.04%) | 1847.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 6.76 V (0.98%) | 683.2 V | 11.15 V (1.62%) | 1462.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 5.41 V (0.78%) | 684.6 V | 8.92 V (1.29%) | 1170.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 4.38 V (0.64%) | 685.6 V | 7.23 V (1.05%) | 948.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 3.38 V (0.49%) | 686.6 V | 5.57 V (0.81%) | 731.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.7 V (0.39%) | 687.3 V | 4.46 V (0.65%) | 585.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.03 V (0.29%) | 688.0 V | 3.34 V (0.48%) | 438.9 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 175 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 125A at 175 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 50 mm² copper cable for 125A over 175m at 690V (voltage drop: 16.22V or 2.35%).
What is the power capacity of 125A at 690V?
At unity power factor, 125A at 690V supports 149.39 kW with a standard 125A circuit breaker.
Related Lengths & Currents (690V)
125A · 5m (690V)125A · 10m (690V)125A · 15m (690V)125A · 20m (690V)125A · 25m (690V)125A · 30m (690V)125A · 35m (690V)125A · 40m (690V)125A · 45m (690V)125A · 50m (690V)125A · 60m (690V)125A · 70m (690V)10A · 175m (690V)16A · 175m (690V)20A · 175m (690V)25A · 175m (690V)32A · 175m (690V)40A · 175m (690V)50A · 175m (690V)63A · 175m (690V)80A · 175m (690V)100A · 175m (690V)160A · 175m (690V)200A · 175m (690V)