450 Amp Cable Size at 120 Meters (400V Three-Phase (IEC European Grid))
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 (1.67%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.25V (2.06%)
Voltage at Load393.3 VLine Loss: 5200.2 W
Max Power & Breaker311.77 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 (333.59%) | 0.0 V | 2201.09 V (550.27%) | 1040040.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 800.62 V (200.16%) | 0.0 V | 1320.65 V (330.16%) | 624024.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 500.39 V (125.1%) | 0.0 V | 825.41 V (206.35%) | 390015.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 333.59 V (83.4%) | 66.4 V | 550.27 V (137.57%) | 260010.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 200.16 V (50.04%) | 199.8 V | 330.16 V (82.54%) | 156006.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 125.1 V (31.27%) | 274.9 V | 206.35 V (51.59%) | 97503.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 80.06 V (20.02%) | 319.9 V | 132.07 V (33.02%) | 62402.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 57.19 V (14.3%) | 342.8 V | 94.33 V (23.58%) | 44573.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 40.03 V (10.01%) | 360.0 V | 66.03 V (16.51%) | 31201.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 28.59 V (7.15%) | 371.4 V | 47.17 V (11.79%) | 22286.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 21.07 V (5.27%) | 378.9 V | 34.75 V (8.69%) | 16421.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 16.68 V (4.17%) | 383.3 V | 27.51 V (6.88%) | 13000.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 13.34 V (3.34%) | 386.7 V | 22.01 V (5.5%) | 10400.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 10.82 V (2.7%) | 389.2 V | 17.85 V (4.46%) | 8432.8 W | Drop High |
| 240 mm² | 415 A | 324 A | 8.34 V (2.08%) | 391.7 V | 13.76 V (3.44%) | 6500.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 6.67 V (1.67%) | 393.3 V | 11.01 V (2.75%) | 5200.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 5.0 V (1.25%) | 395.0 V | 8.25 V (2.06%) | 3900.2 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 120 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 450A at 120 meters (400V)?
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 400V (voltage drop: 6.67V or 1.67%).
What is the power capacity of 450A at 400V?
At unity power factor, 450A at 400V supports 311.77 kW with a standard 450A circuit breaker.
Related Lengths & Currents (400V)
450A · 5m (400V)450A · 10m (400V)450A · 15m (400V)450A · 20m (400V)450A · 25m (400V)450A · 30m (400V)450A · 35m (400V)450A · 40m (400V)450A · 45m (400V)450A · 50m (400V)450A · 60m (400V)450A · 70m (400V)10A · 120m (400V)16A · 120m (400V)20A · 120m (400V)25A · 120m (400V)32A · 120m (400V)40A · 120m (400V)50A · 120m (400V)63A · 120m (400V)80A · 120m (400V)100A · 120m (400V)125A · 120m (400V)160A · 120m (400V)200A · 120m (400V)