125 Amp Cable Size at 150 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 150 m (492.1 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 19.86V (2.88%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 16.38V (2.37%)
Voltage at Load670.1 VLine Loss: 4299.1 W
Max Power & Breaker149.39 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A at 150m
| 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 | 463.32 V (67.15%) | 226.7 V | 764.27 V (110.76%) | 100312.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 277.99 V (40.29%) | 412.0 V | 458.56 V (66.46%) | 60187.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 173.75 V (25.18%) | 516.3 V | 286.6 V (41.54%) | 37617.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 115.83 V (16.79%) | 574.2 V | 191.07 V (27.69%) | 25078.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 69.5 V (10.07%) | 620.5 V | 114.64 V (16.61%) | 15046.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 43.44 V (6.3%) | 646.6 V | 71.65 V (10.38%) | 9404.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 6018.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 19.86 V (2.88%) | 670.1 V | 32.75 V (4.75%) | 4299.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 3009.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 9.93 V (1.44%) | 680.1 V | 16.38 V (2.37%) | 2149.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 7.32 V (1.06%) | 682.7 V | 12.07 V (1.75%) | 1583.9 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 5.79 V (0.84%) | 684.2 V | 9.55 V (1.38%) | 1253.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 4.63 V (0.67%) | 685.4 V | 7.64 V (1.11%) | 1003.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 3.76 V (0.54%) | 686.2 V | 6.2 V (0.9%) | 813.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.9 V (0.42%) | 687.1 V | 4.78 V (0.69%) | 627.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.32 V (0.34%) | 687.7 V | 3.82 V (0.55%) | 501.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.74 V (0.25%) | 688.3 V | 2.87 V (0.42%) | 376.2 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 150 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 125A at 150 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 125A over 150m at 690V (voltage drop: 19.86V or 2.88%).
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 · 150m (690V)16A · 150m (690V)20A · 150m (690V)25A · 150m (690V)32A · 150m (690V)40A · 150m (690V)50A · 150m (690V)63A · 150m (690V)80A · 150m (690V)100A · 150m (690V)160A · 150m (690V)200A · 150m (690V)