450 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 450 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 16.68V (2.42%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 20.64V (2.99%)
Voltage at Load673.3 VLine Loss: 13000.5 W
Max Power & Breaker537.8 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A at 300m
| 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 | 3335.93 V (483.47%) | 0.0 V | 5502.73 V (797.5%) | 2600100.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2001.56 V (290.08%) | 0.0 V | 3301.64 V (478.5%) | 1560060.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1250.97 V (181.3%) | 0.0 V | 2063.52 V (299.06%) | 975037.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 833.98 V (120.87%) | 0.0 V | 1375.68 V (199.37%) | 650025.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 500.39 V (72.52%) | 189.6 V | 825.41 V (119.62%) | 390015.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 312.74 V (45.33%) | 377.3 V | 515.88 V (74.77%) | 243759.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 200.16 V (29.01%) | 489.8 V | 330.16 V (47.85%) | 156006.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 142.97 V (20.72%) | 547.0 V | 235.83 V (34.18%) | 111432.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 100.08 V (14.5%) | 589.9 V | 165.08 V (23.92%) | 78003.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 71.48 V (10.36%) | 618.5 V | 117.92 V (17.09%) | 55716.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 52.67 V (7.63%) | 637.3 V | 86.89 V (12.59%) | 41054.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 41.7 V (6.04%) | 648.3 V | 68.78 V (9.97%) | 32501.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 26001.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 27.05 V (3.92%) | 663.0 V | 44.62 V (6.47%) | 21081.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 20.85 V (3.02%) | 669.2 V | 34.39 V (4.98%) | 16250.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 13000.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 12.51 V (1.81%) | 677.5 V | 20.64 V (2.99%) | 9750.4 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 450A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 450A over 300m at 690V (voltage drop: 16.68V or 2.42%).
What is the power capacity of 450A at 690V?
At unity power factor, 450A at 690V supports 537.8 kW with a standard 450A circuit breaker.
Related Lengths & Currents (690V)
450A · 5m (690V)450A · 10m (690V)450A · 15m (690V)450A · 20m (690V)450A · 25m (690V)450A · 30m (690V)450A · 35m (690V)450A · 40m (690V)450A · 45m (690V)450A · 50m (690V)450A · 60m (690V)450A · 70m (690V)10A · 300m (690V)16A · 300m (690V)20A · 300m (690V)25A · 300m (690V)32A · 300m (690V)40A · 300m (690V)50A · 300m (690V)63A · 300m (690V)80A · 300m (690V)100A · 300m (690V)125A · 300m (690V)160A · 300m (690V)200A · 300m (690V)