125 Amp Cable Size at 35 Meters (230V Single-Phase (IEC Europe / UK / AU))
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: 5.35V (2.33%)
Aluminum Cable (≤3% Drop)70 mm²Drop: 4.41V (1.92%)
Voltage at Load224.7 VLine Loss: 668.8 W
Max Power & Breaker28.75 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 | 124.83 V (54.28%) | 105.2 V | 205.92 V (89.53%) | 15604.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 74.9 V (32.57%) | 155.1 V | 123.55 V (53.72%) | 9362.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 46.81 V (20.35%) | 183.2 V | 77.22 V (33.57%) | 5851.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 31.21 V (13.57%) | 198.8 V | 51.48 V (22.38%) | 3901.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 18.72 V (8.14%) | 211.3 V | 30.89 V (13.43%) | 2340.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 11.7 V (5.09%) | 218.3 V | 19.3 V (8.39%) | 1462.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 7.49 V (3.26%) | 222.5 V | 12.36 V (5.37%) | 936.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 5.35 V (2.33%) | 224.7 V | 8.82 V (3.84%) | 668.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.75 V (1.63%) | 226.3 V | 6.18 V (2.69%) | 468.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.67 V (1.16%) | 227.3 V | 4.41 V (1.92%) | 334.4 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.97 V (0.86%) | 228.0 V | 3.25 V (1.41%) | 246.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.56 V (0.68%) | 228.4 V | 2.57 V (1.12%) | 195.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.25 V (0.54%) | 228.8 V | 2.06 V (0.9%) | 156.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.01 V (0.44%) | 229.0 V | 1.67 V (0.73%) | 126.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.78 V (0.34%) | 229.2 V | 1.29 V (0.56%) | 97.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.62 V (0.27%) | 229.4 V | 1.03 V (0.45%) | 78.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.47 V (0.2%) | 229.5 V | 0.77 V (0.34%) | 58.5 W | ✓ OK (≤3%) |
FAQ — 125 Amp Cable Size at 35 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 125A at 35 meters (230V)?
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 230V (voltage drop: 5.35V or 2.33%).
What is the power capacity of 125A at 230V?
At unity power factor, 125A at 230V supports 28.75 kW with a standard 125A circuit breaker.
Related Lengths & Currents (230V)
125A · 5m (230V)125A · 10m (230V)125A · 15m (230V)125A · 20m (230V)125A · 25m (230V)125A · 30m (230V)125A · 40m (230V)125A · 45m (230V)125A · 50m (230V)125A · 60m (230V)125A · 70m (230V)10A · 35m (230V)16A · 35m (230V)20A · 35m (230V)25A · 35m (230V)32A · 35m (230V)40A · 35m (230V)50A · 35m (230V)63A · 35m (230V)80A · 35m (230V)100A · 35m (230V)160A · 35m (230V)200A · 35m (230V)