25 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 35 m (114.8 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 8.11V (1.18%)
Aluminum Cable (≤3% Drop)4 mm²Drop: 13.37V (1.94%)
Voltage at Load681.9 VLine Loss: 351.1 W
Max Power & Breaker29.88 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A 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 | 21.62 V (3.13%) | 668.4 V | 35.67 V (5.17%) | 936.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 561.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 8.11 V (1.18%) | 681.9 V | 13.37 V (1.94%) | 351.1 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 5.41 V (0.78%) | 684.6 V | 8.92 V (1.29%) | 234.1 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 3.24 V (0.47%) | 686.8 V | 5.35 V (0.78%) | 140.4 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 2.03 V (0.29%) | 688.0 V | 3.34 V (0.48%) | 87.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.3 V (0.19%) | 688.7 V | 2.14 V (0.31%) | 56.2 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.93 V (0.13%) | 689.1 V | 1.53 V (0.22%) | 40.1 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.65 V (0.09%) | 689.4 V | 1.07 V (0.16%) | 28.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.46 V (0.07%) | 689.5 V | 0.76 V (0.11%) | 20.1 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.34 V (0.05%) | 689.7 V | 0.56 V (0.08%) | 14.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.27 V (0.04%) | 689.7 V | 0.45 V (0.06%) | 11.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.22 V (0.03%) | 689.8 V | 0.36 V (0.05%) | 9.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.18 V (0.03%) | 689.8 V | 0.29 V (0.04%) | 7.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.14 V (0.02%) | 689.9 V | 0.22 V (0.03%) | 5.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.11 V (0.02%) | 689.9 V | 0.18 V (0.03%) | 4.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.08 V (0.01%) | 689.9 V | 0.13 V (0.02%) | 3.5 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 25A at 35 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 25A over 35m at 690V (voltage drop: 8.11V or 1.18%).
What is the power capacity of 25A at 690V?
At unity power factor, 25A at 690V supports 29.88 kW with a standard 25A circuit breaker.
Related Lengths & Currents (690V)
25A · 5m (690V)25A · 10m (690V)25A · 15m (690V)25A · 20m (690V)25A · 25m (690V)25A · 30m (690V)25A · 40m (690V)25A · 45m (690V)25A · 50m (690V)25A · 60m (690V)25A · 70m (690V)10A · 35m (690V)16A · 35m (690V)20A · 35m (690V)32A · 35m (690V)40A · 35m (690V)50A · 35m (690V)63A · 35m (690V)80A · 35m (690V)100A · 35m (690V)125A · 35m (690V)160A · 35m (690V)200A · 35m (690V)