300 Amp Cable Size at 175 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 175 m (574.1 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 12.97V (1.88%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 13.37V (1.94%)
Voltage at Load677.0 VLine Loss: 6741.0 W
Max Power & Breaker358.53 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 175m
| 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 | 1297.31 V (188.02%) | 0.0 V | 2139.95 V (310.14%) | 674100.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 778.38 V (112.81%) | 0.0 V | 1283.97 V (186.08%) | 404460.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 486.49 V (70.51%) | 203.5 V | 802.48 V (116.3%) | 252787.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 324.33 V (47.0%) | 365.7 V | 534.99 V (77.53%) | 168525.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 194.6 V (28.2%) | 495.4 V | 320.99 V (46.52%) | 101115.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 121.62 V (17.63%) | 568.4 V | 200.62 V (29.08%) | 63196.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 77.84 V (11.28%) | 612.2 V | 128.4 V (18.61%) | 40446.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 28890.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 38.92 V (5.64%) | 651.1 V | 64.2 V (9.3%) | 20223.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 27.8 V (4.03%) | 662.2 V | 45.86 V (6.65%) | 14445.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 20.48 V (2.97%) | 669.5 V | 33.79 V (4.9%) | 10643.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 16.22 V (2.35%) | 673.8 V | 26.75 V (3.88%) | 8426.2 W | Drop High |
| 150 mm² | 309 A | 241 A | 12.97 V (1.88%) | 677.0 V | 21.4 V (3.1%) | 6741.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 10.52 V (1.52%) | 679.5 V | 17.35 V (2.51%) | 5465.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 8.11 V (1.18%) | 681.9 V | 13.37 V (1.94%) | 4213.1 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 6.49 V (0.94%) | 683.5 V | 10.7 V (1.55%) | 3370.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 4.86 V (0.71%) | 685.1 V | 8.02 V (1.16%) | 2527.9 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 175 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 300A at 175 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 300A over 175m at 690V (voltage drop: 12.97V or 1.88%).
What is the power capacity of 300A at 690V?
At unity power factor, 300A at 690V supports 358.53 kW with a standard 300A circuit breaker.
Related Lengths & Currents (690V)
300A · 5m (690V)300A · 10m (690V)300A · 15m (690V)300A · 20m (690V)300A · 25m (690V)300A · 30m (690V)300A · 35m (690V)300A · 40m (690V)300A · 45m (690V)300A · 50m (690V)300A · 60m (690V)300A · 70m (690V)10A · 175m (690V)16A · 175m (690V)20A · 175m (690V)25A · 175m (690V)32A · 175m (690V)40A · 175m (690V)50A · 175m (690V)63A · 175m (690V)80A · 175m (690V)100A · 175m (690V)125A · 175m (690V)160A · 175m (690V)200A · 175m (690V)