125 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 10.81V (2.7%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 11.15V (2.79%)
Voltage at Load389.2 VLine Loss: 2340.6 W
Max Power & Breaker86.6 kW125A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 125A at 350m
| 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 | 1081.09 V (270.27%) | 0.0 V | 1783.29 V (445.82%) | 234062.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 648.65 V (162.16%) | 0.0 V | 1069.97 V (267.49%) | 140437.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 405.41 V (101.35%) | 0.0 V | 668.73 V (167.18%) | 87773.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 270.27 V (67.57%) | 129.7 V | 445.82 V (111.46%) | 58515.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 162.16 V (40.54%) | 237.8 V | 267.49 V (66.87%) | 35109.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 101.35 V (25.34%) | 298.6 V | 167.18 V (41.8%) | 21943.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 64.87 V (16.22%) | 335.1 V | 107.0 V (26.75%) | 14043.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 46.33 V (11.58%) | 353.7 V | 76.43 V (19.11%) | 10031.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 32.43 V (8.11%) | 367.6 V | 53.5 V (13.37%) | 7021.9 W | Drop High |
| 70 mm² | 192 A | 150 A | 23.17 V (5.79%) | 376.8 V | 38.21 V (9.55%) | 5015.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 17.07 V (4.27%) | 382.9 V | 28.16 V (7.04%) | 3695.7 W | ~ ≤5% |
| 120 mm² | 269 A | 210 A | 13.51 V (3.38%) | 386.5 V | 22.29 V (5.57%) | 2925.8 W | ~ ≤5% |
| 150 mm² | 309 A | 241 A | 10.81 V (2.7%) | 389.2 V | 17.83 V (4.46%) | 2340.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 8.77 V (2.19%) | 391.2 V | 14.46 V (3.61%) | 1897.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 6.76 V (1.69%) | 393.2 V | 11.15 V (2.79%) | 1462.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 5.41 V (1.35%) | 394.6 V | 8.92 V (2.23%) | 1170.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 4.05 V (1.01%) | 395.9 V | 6.69 V (1.67%) | 877.7 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 350 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 125A at 350 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 125A over 350m at 400V (voltage drop: 10.81V or 2.7%).
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 · 35m (400V)125A · 40m (400V)125A · 45m (400V)125A · 50m (400V)125A · 60m (400V)125A · 70m (400V)10A · 350m (400V)16A · 350m (400V)20A · 350m (400V)25A · 350m (400V)32A · 350m (400V)40A · 350m (400V)50A · 350m (400V)63A · 350m (400V)80A · 350m (400V)100A · 350m (400V)160A · 350m (400V)200A · 350m (400V)