32 Amp Cable Size at 25 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 32 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 7.41V (1.79%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 8.15V (1.96%)
Voltage at Load407.6 VLine Loss: 410.9 W
Max Power & Breaker23.0 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A at 25m
| 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 | 19.77 V (4.76%) | 395.2 V | 32.61 V (7.86%) | 1095.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 11.86 V (2.86%) | 403.1 V | 19.57 V (4.71%) | 657.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 7.41 V (1.79%) | 407.6 V | 12.23 V (2.95%) | 410.9 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 4.94 V (1.19%) | 410.1 V | 8.15 V (1.96%) | 273.9 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 2.97 V (0.71%) | 412.0 V | 4.89 V (1.18%) | 164.4 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 1.85 V (0.45%) | 413.1 V | 3.06 V (0.74%) | 102.7 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.19 V (0.29%) | 413.8 V | 1.96 V (0.47%) | 65.7 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.85 V (0.2%) | 414.2 V | 1.4 V (0.34%) | 47.0 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.59 V (0.14%) | 414.4 V | 0.98 V (0.24%) | 32.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.42 V (0.1%) | 414.6 V | 0.7 V (0.17%) | 23.5 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.31 V (0.08%) | 414.7 V | 0.51 V (0.12%) | 17.3 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.25 V (0.06%) | 414.8 V | 0.41 V (0.1%) | 13.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.2 V (0.05%) | 414.8 V | 0.33 V (0.08%) | 11.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.16 V (0.04%) | 414.8 V | 0.26 V (0.06%) | 8.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.12 V (0.03%) | 414.9 V | 0.2 V (0.05%) | 6.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.1 V (0.02%) | 414.9 V | 0.16 V (0.04%) | 5.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.07 V (0.02%) | 414.9 V | 0.12 V (0.03%) | 4.1 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 25 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 32A at 25 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 32A over 25m at 415V (voltage drop: 7.41V or 1.79%).
What is the power capacity of 32A at 415V?
At unity power factor, 32A at 415V supports 23.0 kW with a standard 32A circuit breaker.
Related Lengths & Currents (415V)
32A · 5m (415V)32A · 10m (415V)32A · 15m (415V)32A · 20m (415V)32A · 30m (415V)32A · 35m (415V)32A · 40m (415V)32A · 45m (415V)32A · 50m (415V)32A · 60m (415V)32A · 70m (415V)10A · 25m (415V)16A · 25m (415V)20A · 25m (415V)25A · 25m (415V)40A · 25m (415V)50A · 25m (415V)63A · 25m (415V)80A · 25m (415V)100A · 25m (415V)125A · 25m (415V)160A · 25m (415V)200A · 25m (415V)