275 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 275 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 20.39V (2.95%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 16.81V (2.44%)
Voltage at Load669.6 VLine Loss: 9710.2 W
Max Power & Breaker328.66 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 275A 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 | 2038.62 V (295.45%) | 0.0 V | 3362.78 V (487.36%) | 971025.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1223.17 V (177.27%) | 0.0 V | 2017.67 V (292.42%) | 582615.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 764.48 V (110.79%) | 0.0 V | 1261.04 V (182.76%) | 364134.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 509.66 V (73.86%) | 180.3 V | 840.69 V (121.84%) | 242756.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 305.79 V (44.32%) | 384.2 V | 504.42 V (73.1%) | 145653.8 W | Drop High |
| 16 mm² | 76 A | 59 A | 191.12 V (27.7%) | 498.9 V | 315.26 V (45.69%) | 91033.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 122.32 V (17.73%) | 567.7 V | 201.77 V (29.24%) | 58261.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 87.37 V (12.66%) | 602.6 V | 144.12 V (20.89%) | 41615.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 61.16 V (8.86%) | 628.8 V | 100.88 V (14.62%) | 29130.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 43.68 V (6.33%) | 646.3 V | 72.06 V (10.44%) | 20807.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 32.19 V (4.67%) | 657.8 V | 53.1 V (7.7%) | 15332.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 25.48 V (3.69%) | 664.5 V | 42.03 V (6.09%) | 12137.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 20.39 V (2.95%) | 669.6 V | 33.63 V (4.87%) | 9710.2 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 16.53 V (2.4%) | 673.5 V | 27.27 V (3.95%) | 7873.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 12.74 V (1.85%) | 677.3 V | 21.02 V (3.05%) | 6068.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 10.19 V (1.48%) | 679.8 V | 16.81 V (2.44%) | 4855.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 7.64 V (1.11%) | 682.4 V | 12.61 V (1.83%) | 3641.3 W | ✓ OK (≤3%) |
FAQ — 275 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 275A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 275A over 300m at 690V (voltage drop: 20.39V or 2.95%).
What is the power capacity of 275A at 690V?
At unity power factor, 275A at 690V supports 328.66 kW with a standard 300A circuit breaker.
Related Lengths & Currents (690V)
275A · 5m (690V)275A · 10m (690V)275A · 15m (690V)275A · 20m (690V)275A · 25m (690V)275A · 30m (690V)275A · 35m (690V)275A · 40m (690V)275A · 45m (690V)275A · 50m (690V)275A · 60m (690V)275A · 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)