425 Amp Cable Size at 5 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 425 A over 5 m (16.4 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.26V (0.06%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.32V (0.08%)
Voltage at Load414.7 VLine Loss: 193.3 W
Max Power & Breaker305.49 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 5m
| 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 | 52.51 V (12.65%) | 362.5 V | 86.62 V (20.87%) | 38653.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 31.51 V (7.59%) | 383.5 V | 51.97 V (12.52%) | 23192.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 19.69 V (4.74%) | 395.3 V | 32.48 V (7.83%) | 14495.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 13.13 V (3.16%) | 401.9 V | 21.65 V (5.22%) | 9663.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 7.88 V (1.9%) | 407.1 V | 12.99 V (3.13%) | 5798.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 4.92 V (1.19%) | 410.1 V | 8.12 V (1.96%) | 3623.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.15 V (0.76%) | 411.8 V | 5.2 V (1.25%) | 2319.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 2.25 V (0.54%) | 412.7 V | 3.71 V (0.89%) | 1656.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.58 V (0.38%) | 413.4 V | 2.6 V (0.63%) | 1159.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.13 V (0.27%) | 413.9 V | 1.86 V (0.45%) | 828.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.83 V (0.2%) | 414.2 V | 1.37 V (0.33%) | 610.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.66 V (0.16%) | 414.3 V | 1.08 V (0.26%) | 483.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 0.53 V (0.13%) | 414.5 V | 0.87 V (0.21%) | 386.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 0.43 V (0.1%) | 414.6 V | 0.7 V (0.17%) | 313.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 0.33 V (0.08%) | 414.7 V | 0.54 V (0.13%) | 241.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 0.26 V (0.06%) | 414.7 V | 0.43 V (0.1%) | 193.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.2 V (0.05%) | 414.8 V | 0.32 V (0.08%) | 145.0 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 5 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 425A at 5 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 425A over 5m at 415V (voltage drop: 0.26V or 0.06%).
What is the power capacity of 425A at 415V?
At unity power factor, 425A at 415V supports 305.49 kW with a standard 450A circuit breaker.
Related Lengths & Currents (415V)
425A · 10m (415V)425A · 15m (415V)425A · 20m (415V)425A · 25m (415V)425A · 30m (415V)425A · 35m (415V)425A · 40m (415V)425A · 45m (415V)425A · 50m (415V)425A · 60m (415V)425A · 70m (415V)10A · 5m (415V)16A · 5m (415V)20A · 5m (415V)25A · 5m (415V)32A · 5m (415V)40A · 5m (415V)50A · 5m (415V)63A · 5m (415V)80A · 5m (415V)100A · 5m (415V)125A · 5m (415V)160A · 5m (415V)200A · 5m (415V)