450 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 3.89V (0.94%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.81V (1.16%)
Voltage at Load411.1 VLine Loss: 3033.4 W
Max Power & Breaker323.46 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A at 70m
| 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 | 778.38 V (187.56%) | 0.0 V | 1283.97 V (309.39%) | 606690.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 467.03 V (112.54%) | 0.0 V | 770.38 V (185.63%) | 364014.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 291.89 V (70.34%) | 123.1 V | 481.49 V (116.02%) | 227508.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 194.6 V (46.89%) | 220.4 V | 320.99 V (77.35%) | 151672.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 116.76 V (28.13%) | 298.2 V | 192.6 V (46.41%) | 91003.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 72.97 V (17.58%) | 342.0 V | 120.37 V (29.01%) | 56877.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 46.7 V (11.25%) | 368.3 V | 77.04 V (18.56%) | 36401.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 33.36 V (8.04%) | 381.6 V | 55.03 V (13.26%) | 26001.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 23.35 V (5.63%) | 391.6 V | 38.52 V (9.28%) | 18200.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 16.68 V (4.02%) | 398.3 V | 27.51 V (6.63%) | 13000.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 12.29 V (2.96%) | 402.7 V | 20.27 V (4.89%) | 9579.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 9.73 V (2.34%) | 405.3 V | 16.05 V (3.87%) | 7583.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 7.78 V (1.88%) | 407.2 V | 12.84 V (3.09%) | 6066.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.31 V (1.52%) | 408.7 V | 10.41 V (2.51%) | 4919.1 W | Drop High |
| 240 mm² | 415 A | 324 A | 4.86 V (1.17%) | 410.1 V | 8.02 V (1.93%) | 3791.8 W | Drop High |
| 300 mm² | 477 A | 372 A | 3.89 V (0.94%) | 411.1 V | 6.42 V (1.55%) | 3033.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.92 V (0.7%) | 412.1 V | 4.81 V (1.16%) | 2275.1 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 450A at 70 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 70m at 415V (voltage drop: 3.89V or 0.94%).
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)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)80A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)