450 Amp Cable Size at 250 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 250 m (820.2 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 13.9V (2.01%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 17.2V (2.49%)
Voltage at Load676.1 VLine Loss: 10833.8 W
Max Power & Breaker537.8 kW450A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 450A at 250m
| 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 | 2779.94 V (402.89%) | 0.0 V | 4585.6 V (664.58%) | 2166750.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1667.96 V (241.73%) | 0.0 V | 2751.36 V (398.75%) | 1300050.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1042.48 V (151.08%) | 0.0 V | 1719.6 V (249.22%) | 812531.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 694.99 V (100.72%) | 0.0 V | 1146.4 V (166.15%) | 541687.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 416.99 V (60.43%) | 273.0 V | 687.84 V (99.69%) | 325012.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 260.62 V (37.77%) | 429.4 V | 429.9 V (62.3%) | 203132.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 166.8 V (24.17%) | 523.2 V | 275.14 V (39.87%) | 130005.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 119.14 V (17.27%) | 570.9 V | 196.53 V (28.48%) | 92860.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 83.4 V (12.09%) | 606.6 V | 137.57 V (19.94%) | 65002.5 W | Drop High |
| 70 mm² | 192 A | 150 A | 59.57 V (8.63%) | 630.4 V | 98.26 V (14.24%) | 46430.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 43.89 V (6.36%) | 646.1 V | 72.4 V (10.49%) | 34211.8 W | Drop High |
| 120 mm² | 269 A | 210 A | 34.75 V (5.04%) | 655.3 V | 57.32 V (8.31%) | 27084.4 W | Drop High |
| 150 mm² | 309 A | 241 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 21667.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 22.54 V (3.27%) | 667.5 V | 37.18 V (5.39%) | 17568.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 17.37 V (2.52%) | 672.6 V | 28.66 V (4.15%) | 13542.2 W | Drop High |
| 300 mm² | 477 A | 372 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 10833.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 10.42 V (1.51%) | 679.6 V | 17.2 V (2.49%) | 8125.3 W | ✓ OK (≤3%) |
FAQ — 450 Amp Cable Size at 250 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 450A at 250 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 250m at 690V (voltage drop: 13.9V or 2.01%).
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 · 250m (690V)16A · 250m (690V)20A · 250m (690V)25A · 250m (690V)32A · 250m (690V)40A · 250m (690V)50A · 250m (690V)63A · 250m (690V)80A · 250m (690V)100A · 250m (690V)125A · 250m (690V)160A · 250m (690V)200A · 250m (690V)