125 Amp Cable Size at 35 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 125 A over 35 m (114.8 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 4.63V (1.16%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 3.82V (0.96%)
Voltage at Load395.4 VLine Loss: 1003.1 W
Max Power & Breaker86.6 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A at 35m
| 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 (27.03%) | 291.9 V | 178.33 V (44.58%) | 23406.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 64.87 V (16.22%) | 335.1 V | 107.0 V (26.75%) | 14043.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 40.54 V (10.14%) | 359.5 V | 66.87 V (16.72%) | 8777.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 27.03 V (6.76%) | 373.0 V | 44.58 V (11.15%) | 5851.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 16.22 V (4.05%) | 383.8 V | 26.75 V (6.69%) | 3510.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 10.14 V (2.53%) | 389.9 V | 16.72 V (4.18%) | 2194.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 6.49 V (1.62%) | 393.5 V | 10.7 V (2.67%) | 1404.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 4.63 V (1.16%) | 395.4 V | 7.64 V (1.91%) | 1003.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.24 V (0.81%) | 396.8 V | 5.35 V (1.34%) | 702.2 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.32 V (0.58%) | 397.7 V | 3.82 V (0.96%) | 501.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.71 V (0.43%) | 398.3 V | 2.82 V (0.7%) | 369.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.35 V (0.34%) | 398.6 V | 2.23 V (0.56%) | 292.6 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.08 V (0.27%) | 398.9 V | 1.78 V (0.45%) | 234.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.88 V (0.22%) | 399.1 V | 1.45 V (0.36%) | 189.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.68 V (0.17%) | 399.3 V | 1.11 V (0.28%) | 146.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.54 V (0.14%) | 399.5 V | 0.89 V (0.22%) | 117.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.41 V (0.1%) | 399.6 V | 0.67 V (0.17%) | 87.8 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 35 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 125A at 35 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 125A over 35m at 400V (voltage drop: 4.63V or 1.16%).
What is the power capacity of 125A at 400V?
At unity power factor, 125A at 400V supports 86.6 kW with a standard 125A circuit breaker.
Related Lengths & Currents (400V)
125A · 5m (400V)125A · 10m (400V)125A · 15m (400V)125A · 20m (400V)125A · 25m (400V)125A · 30m (400V)125A · 40m (400V)125A · 45m (400V)125A · 50m (400V)125A · 60m (400V)125A · 70m (400V)10A · 35m (400V)16A · 35m (400V)20A · 35m (400V)25A · 35m (400V)32A · 35m (400V)40A · 35m (400V)50A · 35m (400V)63A · 35m (400V)80A · 35m (400V)100A · 35m (400V)160A · 35m (400V)200A · 35m (400V)