450 Amp Cable Size at 120 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 450 A over 120 m (393.7 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 6.67V (1.61%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.25V (1.99%)
Voltage at Load408.3 VLine Loss: 5200.2 W
Max Power & Breaker323.46 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A at 120m
| 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 | 1334.37 V (321.54%) | 0.0 V | 2201.09 V (530.38%) | 1040040.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 800.62 V (192.92%) | 0.0 V | 1320.65 V (318.23%) | 624024.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 500.39 V (120.58%) | 0.0 V | 825.41 V (198.89%) | 390015.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 333.59 V (80.38%) | 81.4 V | 550.27 V (132.6%) | 260010.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 200.16 V (48.23%) | 214.8 V | 330.16 V (79.56%) | 156006.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 125.1 V (30.14%) | 289.9 V | 206.35 V (49.72%) | 97503.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 80.06 V (19.29%) | 334.9 V | 132.07 V (31.82%) | 62402.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 57.19 V (13.78%) | 357.8 V | 94.33 V (22.73%) | 44573.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 40.03 V (9.65%) | 375.0 V | 66.03 V (15.91%) | 31201.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 28.59 V (6.89%) | 386.4 V | 47.17 V (11.37%) | 22286.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 21.07 V (5.08%) | 393.9 V | 34.75 V (8.37%) | 16421.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 16.68 V (4.02%) | 398.3 V | 27.51 V (6.63%) | 13000.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 13.34 V (3.22%) | 401.7 V | 22.01 V (5.3%) | 10400.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 10.82 V (2.61%) | 404.2 V | 17.85 V (4.3%) | 8432.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.34 V (2.01%) | 406.7 V | 13.76 V (3.31%) | 6500.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.67 V (1.61%) | 408.3 V | 11.01 V (2.65%) | 5200.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 5.0 V (1.21%) | 410.0 V | 8.25 V (1.99%) | 3900.2 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 120 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 450A at 120 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 450A over 120m at 415V (voltage drop: 6.67V or 1.61%).
What is the power capacity of 450A at 415V?
At unity power factor, 450A at 415V supports 323.46 kW with a standard 450A circuit breaker.
Related Lengths & Currents (415V)
450A · 5m (415V)450A · 10m (415V)450A · 15m (415V)450A · 20m (415V)450A · 25m (415V)450A · 30m (415V)450A · 35m (415V)450A · 40m (415V)450A · 45m (415V)450A · 50m (415V)450A · 60m (415V)450A · 70m (415V)10A · 120m (415V)16A · 120m (415V)20A · 120m (415V)25A · 120m (415V)32A · 120m (415V)40A · 120m (415V)50A · 120m (415V)63A · 120m (415V)80A · 120m (415V)100A · 120m (415V)125A · 120m (415V)160A · 120m (415V)200A · 120m (415V)