425 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 2.63V (0.63%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.25V (0.78%)
Voltage at Load412.4 VLine Loss: 1932.7 W
Max Power & Breaker305.49 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A 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 | 525.1 V (126.53%) | 0.0 V | 866.17 V (208.72%) | 386537.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 315.06 V (75.92%) | 99.9 V | 519.7 V (125.23%) | 231922.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 196.91 V (47.45%) | 218.1 V | 324.81 V (78.27%) | 144951.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 131.28 V (31.63%) | 283.7 V | 216.54 V (52.18%) | 96634.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 78.77 V (18.98%) | 336.2 V | 129.93 V (31.31%) | 57980.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 49.23 V (11.86%) | 365.8 V | 81.2 V (19.57%) | 36237.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 31.51 V (7.59%) | 383.5 V | 51.97 V (12.52%) | 23192.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 22.5 V (5.42%) | 392.5 V | 37.12 V (8.94%) | 16565.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 15.75 V (3.8%) | 399.2 V | 25.99 V (6.26%) | 11596.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 11.25 V (2.71%) | 403.7 V | 18.56 V (4.47%) | 8282.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 8.29 V (2.0%) | 406.7 V | 13.68 V (3.3%) | 6103.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.56 V (1.58%) | 408.4 V | 10.83 V (2.61%) | 4831.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.25 V (1.27%) | 409.7 V | 8.66 V (2.09%) | 3865.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.26 V (1.03%) | 410.7 V | 7.02 V (1.69%) | 3134.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.28 V (0.79%) | 411.7 V | 5.41 V (1.3%) | 2415.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.63 V (0.63%) | 412.4 V | 4.33 V (1.04%) | 1932.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.97 V (0.47%) | 413.0 V | 3.25 V (0.78%) | 1449.5 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 50 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 425A at 50 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 50m at 415V (voltage drop: 2.63V or 0.63%).
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 · 5m (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 · 60m (415V)425A · 70m (415V)10A · 50m (415V)16A · 50m (415V)20A · 50m (415V)25A · 50m (415V)32A · 50m (415V)40A · 50m (415V)50A · 50m (415V)63A · 50m (415V)80A · 50m (415V)100A · 50m (415V)125A · 50m (415V)160A · 50m (415V)200A · 50m (415V)