450 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 2.5V (0.36%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 3.1V (0.45%)
Voltage at Load687.5 VLine Loss: 1950.1 W
Max Power & Breaker537.8 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A at 45m
| 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 | 500.39 V (72.52%) | 189.6 V | 825.41 V (119.62%) | 390015.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 300.23 V (43.51%) | 389.8 V | 495.25 V (71.77%) | 234009.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 187.65 V (27.2%) | 502.4 V | 309.53 V (44.86%) | 146255.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 125.1 V (18.13%) | 564.9 V | 206.35 V (29.91%) | 97503.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 75.06 V (10.88%) | 614.9 V | 123.81 V (17.94%) | 58502.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 46.91 V (6.8%) | 643.1 V | 77.38 V (11.21%) | 36563.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 30.02 V (4.35%) | 660.0 V | 49.52 V (7.18%) | 23400.9 W | Drop High |
| 35 mm² | 125 A | 97 A | 21.45 V (3.11%) | 668.6 V | 35.37 V (5.13%) | 16714.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 15.01 V (2.18%) | 675.0 V | 24.76 V (3.59%) | 11700.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 10.72 V (1.55%) | 679.3 V | 17.69 V (2.56%) | 8357.5 W | Drop High |
| 95 mm² | 232 A | 181 A | 7.9 V (1.15%) | 682.1 V | 13.03 V (1.89%) | 6158.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 6.25 V (0.91%) | 683.7 V | 10.32 V (1.5%) | 4875.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 5.0 V (0.73%) | 685.0 V | 8.25 V (1.2%) | 3900.1 W | Drop High |
| 185 mm² | 353 A | 275 A | 4.06 V (0.59%) | 685.9 V | 6.69 V (0.97%) | 3162.3 W | Drop High |
| 240 mm² | 415 A | 324 A | 3.13 V (0.45%) | 686.9 V | 5.16 V (0.75%) | 2437.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 2.5 V (0.36%) | 687.5 V | 4.13 V (0.6%) | 1950.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.88 V (0.27%) | 688.1 V | 3.1 V (0.45%) | 1462.6 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 45 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 450A at 45 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 45m at 690V (voltage drop: 2.5V or 0.36%).
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 · 50m (690V)450A · 60m (690V)450A · 70m (690V)10A · 45m (690V)16A · 45m (690V)20A · 45m (690V)25A · 45m (690V)32A · 45m (690V)40A · 45m (690V)50A · 45m (690V)63A · 45m (690V)80A · 45m (690V)100A · 45m (690V)125A · 45m (690V)160A · 45m (690V)200A · 45m (690V)