25 Amp Cable Size at 50 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 50 m (164.0 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 11.58V (2.9%)
Aluminum Cable (≤3% Drop)10 mm²Drop: 7.64V (1.91%)
Voltage at Load388.4 VLine Loss: 501.6 W
Max Power & Breaker17.32 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A at 50m
| 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 | 30.89 V (7.72%) | 369.1 V | 50.95 V (12.74%) | 1337.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 18.53 V (4.63%) | 381.5 V | 30.57 V (7.64%) | 802.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 11.58 V (2.9%) | 388.4 V | 19.11 V (4.78%) | 501.6 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 7.72 V (1.93%) | 392.3 V | 12.74 V (3.18%) | 334.4 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 4.63 V (1.16%) | 395.4 V | 7.64 V (1.91%) | 200.6 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 2.9 V (0.72%) | 397.1 V | 4.78 V (1.19%) | 125.4 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.85 V (0.46%) | 398.1 V | 3.06 V (0.76%) | 80.2 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.32 V (0.33%) | 398.7 V | 2.18 V (0.55%) | 57.3 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.93 V (0.23%) | 399.1 V | 1.53 V (0.38%) | 40.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.66 V (0.17%) | 399.3 V | 1.09 V (0.27%) | 28.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.49 V (0.12%) | 399.5 V | 0.8 V (0.2%) | 21.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.39 V (0.1%) | 399.6 V | 0.64 V (0.16%) | 16.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.31 V (0.08%) | 399.7 V | 0.51 V (0.13%) | 13.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.25 V (0.06%) | 399.7 V | 0.41 V (0.1%) | 10.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.19 V (0.05%) | 399.8 V | 0.32 V (0.08%) | 8.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.15 V (0.04%) | 399.8 V | 0.25 V (0.06%) | 6.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.12 V (0.03%) | 399.9 V | 0.19 V (0.05%) | 5.0 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 50 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 25A at 50 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 25A over 50m at 400V (voltage drop: 11.58V or 2.9%).
What is the power capacity of 25A at 400V?
At unity power factor, 25A at 400V supports 17.32 kW with a standard 25A circuit breaker.
Related Lengths & Currents (400V)
25A · 5m (400V)25A · 10m (400V)25A · 15m (400V)25A · 20m (400V)25A · 25m (400V)25A · 30m (400V)25A · 35m (400V)25A · 40m (400V)25A · 45m (400V)25A · 60m (400V)25A · 70m (400V)10A · 50m (400V)16A · 50m (400V)20A · 50m (400V)32A · 50m (400V)40A · 50m (400V)50A · 50m (400V)63A · 50m (400V)80A · 50m (400V)100A · 50m (400V)125A · 50m (400V)160A · 50m (400V)200A · 50m (400V)