550 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 550 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)400 mm²Drop: 15.29V (2.22%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 25.22V (3.66%)
Voltage at Load674.7 VLine Loss: 14565.4 W
Max Power & Breaker657.31 kW600A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A 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 | 4077.25 V (590.91%) | 0.0 V | 6725.55 V (974.72%) | 3884100.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 2446.35 V (354.54%) | 0.0 V | 4035.33 V (584.83%) | 2330460.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 1528.97 V (221.59%) | 0.0 V | 2522.08 V (365.52%) | 1456537.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 1019.31 V (147.73%) | 0.0 V | 1681.39 V (243.68%) | 971025.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 611.59 V (88.64%) | 78.4 V | 1008.83 V (146.21%) | 582615.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 382.24 V (55.4%) | 307.8 V | 630.52 V (91.38%) | 364134.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 244.63 V (35.45%) | 445.4 V | 403.53 V (58.48%) | 233046.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 174.74 V (25.32%) | 515.3 V | 288.24 V (41.77%) | 166461.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 122.32 V (17.73%) | 567.7 V | 201.77 V (29.24%) | 116523.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 87.37 V (12.66%) | 602.6 V | 144.12 V (20.89%) | 83230.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 64.38 V (9.33%) | 625.6 V | 106.19 V (15.39%) | 61327.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 50.97 V (7.39%) | 639.0 V | 84.07 V (12.18%) | 48551.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 40.77 V (5.91%) | 649.2 V | 67.26 V (9.75%) | 38841.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 33.06 V (4.79%) | 656.9 V | 54.53 V (7.9%) | 31492.7 W | Drop High |
| 240 mm² | 415 A | 324 A | 25.48 V (3.69%) | 664.5 V | 42.03 V (6.09%) | 24275.6 W | Drop High |
| 300 mm² | 477 A | 372 A | 20.39 V (2.95%) | 669.6 V | 33.63 V (4.87%) | 19420.5 W | Drop High |
| 400 mm² | 570 A | 445 A | 15.29 V (2.22%) | 674.7 V | 25.22 V (3.66%) | 14565.4 W | ✓ OK (≤3%) |
FAQ — 550 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 550A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 550A over 300m at 690V (voltage drop: 15.29V or 2.22%).
What is the power capacity of 550A at 690V?
At unity power factor, 550A at 690V supports 657.31 kW with a standard 600A circuit breaker.
Related Lengths & Currents (690V)
550A · 5m (690V)550A · 10m (690V)550A · 15m (690V)550A · 20m (690V)550A · 25m (690V)550A · 30m (690V)550A · 35m (690V)550A · 40m (690V)550A · 45m (690V)550A · 50m (690V)550A · 60m (690V)550A · 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)