325 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 7.81V (1.13%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 7.95V (1.15%)
Voltage at Load682.2 VLine Loss: 4398.6 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 120m
| 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 | 963.71 V (139.67%) | 0.0 V | 1589.68 V (230.39%) | 542490.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 578.23 V (83.8%) | 111.8 V | 953.81 V (138.23%) | 325494.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 361.39 V (52.38%) | 328.6 V | 596.13 V (86.4%) | 203433.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 240.93 V (34.92%) | 449.1 V | 397.42 V (57.6%) | 135622.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 144.56 V (20.95%) | 545.4 V | 238.45 V (34.56%) | 81373.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 90.35 V (13.09%) | 599.7 V | 149.03 V (21.6%) | 50858.4 W | Drop High |
| 25 mm² | 101 A | 78 A | 57.82 V (8.38%) | 632.2 V | 95.38 V (13.82%) | 32549.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 41.3 V (5.99%) | 648.7 V | 68.13 V (9.87%) | 23249.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 28.91 V (4.19%) | 661.1 V | 47.69 V (6.91%) | 16274.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 20.65 V (2.99%) | 669.3 V | 34.06 V (4.94%) | 11624.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 15.22 V (2.21%) | 674.8 V | 25.1 V (3.64%) | 8565.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 12.05 V (1.75%) | 678.0 V | 19.87 V (2.88%) | 6781.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 9.64 V (1.4%) | 680.4 V | 15.9 V (2.3%) | 5424.9 W | Drop High |
| 185 mm² | 353 A | 275 A | 7.81 V (1.13%) | 682.2 V | 12.89 V (1.87%) | 4398.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 6.02 V (0.87%) | 684.0 V | 9.94 V (1.44%) | 3390.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 4.82 V (0.7%) | 685.2 V | 7.95 V (1.15%) | 2712.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 3.61 V (0.52%) | 686.4 V | 5.96 V (0.86%) | 2034.3 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 120 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 120m at 690V (voltage drop: 7.81V or 1.13%).
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 · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)80A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)