425 Amp Cable Size at 15 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 15 m (49.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 0.79V (0.19%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 0.97V (0.23%)
Voltage at Load414.2 VLine Loss: 579.8 W
Max Power & Breaker305.49 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 15m
| 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 | 157.53 V (37.96%) | 257.5 V | 259.85 V (62.61%) | 115961.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 94.52 V (22.78%) | 320.5 V | 155.91 V (37.57%) | 69576.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 59.07 V (14.23%) | 355.9 V | 97.44 V (23.48%) | 43485.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 39.38 V (9.49%) | 375.6 V | 64.96 V (15.65%) | 28990.3 W | Drop High |
| 10 mm² | 57 A | 44 A | 23.63 V (5.69%) | 391.4 V | 38.98 V (9.39%) | 17394.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 14.77 V (3.56%) | 400.2 V | 24.36 V (5.87%) | 10871.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 9.45 V (2.28%) | 405.5 V | 15.59 V (3.76%) | 6957.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 6.75 V (1.63%) | 408.2 V | 11.14 V (2.68%) | 4969.8 W | Drop High |
| 50 mm² | 151 A | 118 A | 4.73 V (1.14%) | 410.3 V | 7.8 V (1.88%) | 3478.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 3.38 V (0.81%) | 411.6 V | 5.57 V (1.34%) | 2484.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 2.49 V (0.6%) | 412.5 V | 4.1 V (0.99%) | 1831.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.97 V (0.47%) | 413.0 V | 3.25 V (0.78%) | 1449.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.58 V (0.38%) | 413.4 V | 2.6 V (0.63%) | 1159.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.28 V (0.31%) | 413.7 V | 2.11 V (0.51%) | 940.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 0.98 V (0.24%) | 414.0 V | 1.62 V (0.39%) | 724.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 0.79 V (0.19%) | 414.2 V | 1.3 V (0.31%) | 579.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.59 V (0.14%) | 414.4 V | 0.97 V (0.23%) | 434.9 W | ✓ OK (≤3%) |
FAQ — 425 Amp Cable Size at 15 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 425A at 15 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 15m at 415V (voltage drop: 0.79V or 0.19%).
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 · 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 · 15m (415V)16A · 15m (415V)20A · 15m (415V)25A · 15m (415V)32A · 15m (415V)40A · 15m (415V)50A · 15m (415V)63A · 15m (415V)80A · 15m (415V)100A · 15m (415V)125A · 15m (415V)160A · 15m (415V)200A · 15m (415V)