425 Amp Cable Size at 400 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 400 m (1312.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 7.88V (1.9%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 25.99V (6.26%)
Voltage at Load407.1 VLine Loss: 5798.1 W
Max Power & Breaker305.49 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 400m
| 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 | 4200.8 V (1012.24%) | 0.0 V | 6929.36 V (1669.72%) | 3092300.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2520.48 V (607.34%) | 0.0 V | 4157.61 V (1001.83%) | 1855380.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1575.3 V (379.59%) | 0.0 V | 2598.51 V (626.15%) | 1159612.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 1050.2 V (253.06%) | 0.0 V | 1732.34 V (417.43%) | 773075.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 630.12 V (151.84%) | 0.0 V | 1039.4 V (250.46%) | 463845.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 393.83 V (94.9%) | 21.2 V | 649.63 V (156.54%) | 289903.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 252.05 V (60.73%) | 163.0 V | 415.76 V (100.18%) | 185538.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 180.03 V (43.38%) | 235.0 V | 296.97 V (71.56%) | 132527.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 126.02 V (30.37%) | 289.0 V | 207.88 V (50.09%) | 92769.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 90.02 V (21.69%) | 325.0 V | 148.49 V (35.78%) | 66263.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 66.33 V (15.98%) | 348.7 V | 109.41 V (26.36%) | 48825.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 52.51 V (12.65%) | 362.5 V | 86.62 V (20.87%) | 38653.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 42.01 V (10.12%) | 373.0 V | 69.29 V (16.7%) | 30923.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 34.06 V (8.21%) | 380.9 V | 56.18 V (13.54%) | 25072.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 26.26 V (6.33%) | 388.7 V | 43.31 V (10.44%) | 19326.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 21.0 V (5.06%) | 394.0 V | 34.65 V (8.35%) | 15461.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 15.75 V (3.8%) | 399.2 V | 25.99 V (6.26%) | 11596.1 W | ~ ≤5% |
FAQ — 425 Amp Cable Size at 400 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 425A at 400 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 425A over 400m at 415V (voltage drop: 7.88V or 1.9%).
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 · 50m (415V)425A · 60m (415V)425A · 70m (415V)10A · 400m (415V)16A · 400m (415V)20A · 400m (415V)25A · 400m (415V)32A · 400m (415V)40A · 400m (415V)50A · 400m (415V)63A · 400m (415V)80A · 400m (415V)100A · 400m (415V)125A · 400m (415V)160A · 400m (415V)200A · 400m (415V)