325 Amp Cable Size at 30 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 30 m (98.4 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 1.95V (0.28%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 1.99V (0.29%)
Voltage at Load688.0 VLine Loss: 1099.6 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 30m
| 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 | 240.93 V (34.92%) | 449.1 V | 397.42 V (57.6%) | 135622.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 144.56 V (20.95%) | 545.4 V | 238.45 V (34.56%) | 81373.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 90.35 V (13.09%) | 599.7 V | 149.03 V (21.6%) | 50858.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 60.23 V (8.73%) | 629.8 V | 99.35 V (14.4%) | 33905.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 36.14 V (5.24%) | 653.9 V | 59.61 V (8.64%) | 20343.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 22.59 V (3.27%) | 667.4 V | 37.26 V (5.4%) | 12714.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 14.46 V (2.1%) | 675.5 V | 23.85 V (3.46%) | 8137.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 10.33 V (1.5%) | 679.7 V | 17.03 V (2.47%) | 5812.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 7.23 V (1.05%) | 682.8 V | 11.92 V (1.73%) | 4068.7 W | Drop High |
| 70 mm² | 192 A | 150 A | 5.16 V (0.75%) | 684.8 V | 8.52 V (1.23%) | 2906.2 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.8 V (0.55%) | 686.2 V | 6.28 V (0.91%) | 2141.4 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.01 V (0.44%) | 687.0 V | 4.97 V (0.72%) | 1695.3 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.41 V (0.35%) | 687.6 V | 3.97 V (0.58%) | 1356.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.95 V (0.28%) | 688.0 V | 3.22 V (0.47%) | 1099.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.51 V (0.22%) | 688.5 V | 2.48 V (0.36%) | 847.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.2 V (0.17%) | 688.8 V | 1.99 V (0.29%) | 678.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.9 V (0.13%) | 689.1 V | 1.49 V (0.22%) | 508.6 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 30 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 30 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 30m at 690V (voltage drop: 1.95V or 0.28%).
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 · 35m (690V)325A · 40m (690V)325A · 45m (690V)325A · 50m (690V)325A · 60m (690V)325A · 70m (690V)10A · 30m (690V)16A · 30m (690V)20A · 30m (690V)25A · 30m (690V)32A · 30m (690V)40A · 30m (690V)50A · 30m (690V)63A · 30m (690V)80A · 30m (690V)100A · 30m (690V)125A · 30m (690V)160A · 30m (690V)200A · 30m (690V)