325 Amp Cable Size at 50 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 50 m (164.0 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 3.26V (0.47%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 3.31V (0.48%)
Voltage at Load686.7 VLine Loss: 1832.7 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 50m
| 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 | 401.55 V (58.2%) | 288.5 V | 662.37 V (95.99%) | 226037.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 240.93 V (34.92%) | 449.1 V | 397.42 V (57.6%) | 135622.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 150.58 V (21.82%) | 539.4 V | 248.39 V (36.0%) | 84764.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 100.39 V (14.55%) | 589.6 V | 165.59 V (24.0%) | 56509.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 60.23 V (8.73%) | 629.8 V | 99.35 V (14.4%) | 33905.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 37.65 V (5.46%) | 652.4 V | 62.1 V (9.0%) | 21191.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 24.09 V (3.49%) | 665.9 V | 39.74 V (5.76%) | 13562.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 17.21 V (2.49%) | 672.8 V | 28.39 V (4.11%) | 9687.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 12.05 V (1.75%) | 678.0 V | 19.87 V (2.88%) | 6781.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 8.6 V (1.25%) | 681.4 V | 14.19 V (2.06%) | 4843.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 6.34 V (0.92%) | 683.7 V | 10.46 V (1.52%) | 3569.0 W | Drop High |
| 120 mm² | 269 A | 210 A | 5.02 V (0.73%) | 685.0 V | 8.28 V (1.2%) | 2825.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 4.02 V (0.58%) | 686.0 V | 6.62 V (0.96%) | 2260.4 W | Drop High |
| 185 mm² | 353 A | 275 A | 3.26 V (0.47%) | 686.7 V | 5.37 V (0.78%) | 1832.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.51 V (0.36%) | 687.5 V | 4.14 V (0.6%) | 1412.7 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 2.01 V (0.29%) | 688.0 V | 3.31 V (0.48%) | 1130.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.51 V (0.22%) | 688.5 V | 2.48 V (0.36%) | 847.6 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 50 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 50 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 50m at 690V (voltage drop: 3.26V or 0.47%).
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 · 60m (690V)325A · 70m (690V)10A · 50m (690V)16A · 50m (690V)20A · 50m (690V)25A · 50m (690V)32A · 50m (690V)40A · 50m (690V)50A · 50m (690V)63A · 50m (690V)80A · 50m (690V)100A · 50m (690V)125A · 50m (690V)160A · 50m (690V)200A · 50m (690V)