325 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 5.21V (0.75%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 5.3V (0.77%)
Voltage at Load684.8 VLine Loss: 2932.4 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 80m
| 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 | 642.48 V (93.11%) | 47.5 V | 1059.78 V (153.59%) | 361660.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 385.49 V (55.87%) | 304.5 V | 635.87 V (92.16%) | 216996.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 240.93 V (34.92%) | 449.1 V | 397.42 V (57.6%) | 135622.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 160.62 V (23.28%) | 529.4 V | 264.95 V (38.4%) | 90415.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 96.37 V (13.97%) | 593.6 V | 158.97 V (23.04%) | 54249.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 60.23 V (8.73%) | 629.8 V | 99.35 V (14.4%) | 33905.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 38.55 V (5.59%) | 651.5 V | 63.59 V (9.22%) | 21699.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 27.53 V (3.99%) | 662.5 V | 45.42 V (6.58%) | 15499.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 19.27 V (2.79%) | 670.7 V | 31.79 V (4.61%) | 10849.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 13.77 V (2.0%) | 676.2 V | 22.71 V (3.29%) | 7749.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 10.14 V (1.47%) | 679.9 V | 16.73 V (2.43%) | 5710.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 8.03 V (1.16%) | 682.0 V | 13.25 V (1.92%) | 4520.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 6.42 V (0.93%) | 683.6 V | 10.6 V (1.54%) | 3616.6 W | Drop High |
| 185 mm² | 353 A | 275 A | 5.21 V (0.75%) | 684.8 V | 8.59 V (1.25%) | 2932.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 4.02 V (0.58%) | 686.0 V | 6.62 V (0.96%) | 2260.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.21 V (0.47%) | 686.8 V | 5.3 V (0.77%) | 1808.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.41 V (0.35%) | 687.6 V | 3.97 V (0.58%) | 1356.2 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 80 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 80 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 80m at 690V (voltage drop: 5.21V or 0.75%).
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 · 80m (690V)16A · 80m (690V)20A · 80m (690V)25A · 80m (690V)32A · 80m (690V)40A · 80m (690V)50A · 80m (690V)63A · 80m (690V)80A · 80m (690V)100A · 80m (690V)125A · 80m (690V)160A · 80m (690V)200A · 80m (690V)