325 Amp Cable Size at 35 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 35 m (114.8 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 2.28V (0.33%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 2.32V (0.34%)
Voltage at Load687.7 VLine Loss: 1282.9 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 35m
| 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 | 281.08 V (40.74%) | 408.9 V | 463.66 V (67.2%) | 158226.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 168.65 V (24.44%) | 521.4 V | 278.19 V (40.32%) | 94935.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 105.41 V (15.28%) | 584.6 V | 173.87 V (25.2%) | 59334.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 70.27 V (10.18%) | 619.7 V | 115.91 V (16.8%) | 39556.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 42.16 V (6.11%) | 647.8 V | 69.55 V (10.08%) | 23733.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 26.35 V (3.82%) | 663.6 V | 43.47 V (6.3%) | 14833.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 16.86 V (2.44%) | 673.1 V | 27.82 V (4.03%) | 9493.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 12.05 V (1.75%) | 678.0 V | 19.87 V (2.88%) | 6781.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 8.43 V (1.22%) | 681.6 V | 13.91 V (2.02%) | 4746.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.02 V (0.87%) | 684.0 V | 9.94 V (1.44%) | 3390.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.44 V (0.64%) | 685.6 V | 7.32 V (1.06%) | 2498.3 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.51 V (0.51%) | 686.5 V | 5.8 V (0.84%) | 1977.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.81 V (0.41%) | 687.2 V | 4.64 V (0.67%) | 1582.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.28 V (0.33%) | 687.7 V | 3.76 V (0.54%) | 1282.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.76 V (0.25%) | 688.2 V | 2.9 V (0.42%) | 988.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.41 V (0.2%) | 688.6 V | 2.32 V (0.34%) | 791.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.05 V (0.15%) | 688.9 V | 1.74 V (0.25%) | 593.3 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 35 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 35 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 35m at 690V (voltage drop: 2.28V or 0.33%).
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 · 40m (690V)325A · 45m (690V)325A · 50m (690V)325A · 60m (690V)325A · 70m (690V)10A · 35m (690V)16A · 35m (690V)20A · 35m (690V)25A · 35m (690V)32A · 35m (690V)40A · 35m (690V)50A · 35m (690V)63A · 35m (690V)80A · 35m (690V)100A · 35m (690V)125A · 35m (690V)160A · 35m (690V)200A · 35m (690V)