325 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 325 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 19.53V (2.83%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 19.87V (2.88%)
Voltage at Load670.5 VLine Loss: 10996.4 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A 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 | 2409.28 V (349.17%) | 0.0 V | 3974.19 V (575.97%) | 1356225.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 1445.57 V (209.5%) | 0.0 V | 2384.51 V (345.58%) | 813735.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 903.48 V (130.94%) | 0.0 V | 1490.32 V (215.99%) | 508584.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 602.32 V (87.29%) | 87.7 V | 993.55 V (143.99%) | 339056.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 361.39 V (52.38%) | 328.6 V | 596.13 V (86.4%) | 203433.8 W | Drop High |
| 16 mm² | 76 A | 59 A | 225.87 V (32.73%) | 464.1 V | 372.58 V (54.0%) | 127146.1 W | Drop High |
| 25 mm² | 101 A | 78 A | 144.56 V (20.95%) | 545.4 V | 238.45 V (34.56%) | 81373.5 W | Drop High |
| 35 mm² | 125 A | 97 A | 103.25 V (14.96%) | 586.7 V | 170.32 V (24.68%) | 58123.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 72.28 V (10.48%) | 617.7 V | 119.23 V (17.28%) | 40686.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 51.63 V (7.48%) | 638.4 V | 85.16 V (12.34%) | 29062.0 W | Drop High |
| 95 mm² | 232 A | 181 A | 38.04 V (5.51%) | 652.0 V | 62.75 V (9.09%) | 21414.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 30.12 V (4.36%) | 659.9 V | 49.68 V (7.2%) | 16952.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 24.09 V (3.49%) | 665.9 V | 39.74 V (5.76%) | 13562.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 19.53 V (2.83%) | 670.5 V | 32.22 V (4.67%) | 10996.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 15.06 V (2.18%) | 674.9 V | 24.84 V (3.6%) | 8476.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 12.05 V (1.75%) | 678.0 V | 19.87 V (2.88%) | 6781.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 9.03 V (1.31%) | 681.0 V | 14.9 V (2.16%) | 5085.8 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 185 mm² copper cable for 325A over 300m at 690V (voltage drop: 19.53V or 2.83%).
What is the power capacity of 325A at 690V?
At unity power factor, 325A at 690V supports 388.41 kW with a standard 350A circuit breaker.
Related Lengths & Currents (690V)
325A · 5m (690V)325A · 10m (690V)325A · 15m (690V)325A · 20m (690V)325A · 25m (690V)325A · 30m (690V)325A · 35m (690V)325A · 40m (690V)325A · 45m (690V)325A · 50m (690V)325A · 60m (690V)325A · 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)