325 Amp Cable Size at 90 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 90 m (295.3 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 5.86V (0.85%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 5.96V (0.86%)
Voltage at Load684.1 VLine Loss: 3298.9 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 90m
| 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 | 722.78 V (104.75%) | 0.0 V | 1192.26 V (172.79%) | 406867.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 433.67 V (62.85%) | 256.3 V | 715.35 V (103.67%) | 244120.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 271.04 V (39.28%) | 419.0 V | 447.1 V (64.8%) | 152575.3 W | Drop High |
| 6 mm² | 41 A | 32 A | 180.7 V (26.19%) | 509.3 V | 298.06 V (43.2%) | 101716.9 W | Drop High |
| 10 mm² | 57 A | 44 A | 108.42 V (15.71%) | 581.6 V | 178.84 V (25.92%) | 61030.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 67.76 V (9.82%) | 622.2 V | 111.77 V (16.2%) | 38143.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 43.37 V (6.29%) | 646.6 V | 71.54 V (10.37%) | 24412.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 30.98 V (4.49%) | 659.0 V | 51.1 V (7.41%) | 17437.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 21.68 V (3.14%) | 668.3 V | 35.77 V (5.18%) | 12206.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 15.49 V (2.24%) | 674.5 V | 25.55 V (3.7%) | 8718.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 11.41 V (1.65%) | 678.6 V | 18.83 V (2.73%) | 6424.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 9.03 V (1.31%) | 681.0 V | 14.9 V (2.16%) | 5085.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 7.23 V (1.05%) | 682.8 V | 11.92 V (1.73%) | 4068.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 5.86 V (0.85%) | 684.1 V | 9.67 V (1.4%) | 3298.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 4.52 V (0.65%) | 685.5 V | 7.45 V (1.08%) | 2542.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.61 V (0.52%) | 686.4 V | 5.96 V (0.86%) | 2034.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.71 V (0.39%) | 687.3 V | 4.47 V (0.65%) | 1525.8 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 90 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 90m at 690V (voltage drop: 5.86V or 0.85%).
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 · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)