325 Amp Cable Size at 45 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 45 m (147.6 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 2.93V (0.42%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 2.98V (0.43%)
Voltage at Load687.1 VLine Loss: 1649.5 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 45m
| 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 | 361.39 V (52.38%) | 328.6 V | 596.13 V (86.4%) | 203433.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 216.84 V (31.43%) | 473.2 V | 357.68 V (51.84%) | 122060.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 135.52 V (19.64%) | 554.5 V | 223.55 V (32.4%) | 76287.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 90.35 V (13.09%) | 599.7 V | 149.03 V (21.6%) | 50858.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 54.21 V (7.86%) | 635.8 V | 89.42 V (12.96%) | 30515.1 W | Drop High |
| 16 mm² | 76 A | 59 A | 33.88 V (4.91%) | 656.1 V | 55.89 V (8.1%) | 19071.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 21.68 V (3.14%) | 668.3 V | 35.77 V (5.18%) | 12206.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 15.49 V (2.24%) | 674.5 V | 25.55 V (3.7%) | 8718.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 10.84 V (1.57%) | 679.2 V | 17.88 V (2.59%) | 6103.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 7.74 V (1.12%) | 682.3 V | 12.77 V (1.85%) | 4359.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 5.71 V (0.83%) | 684.3 V | 9.41 V (1.36%) | 3212.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 4.52 V (0.65%) | 685.5 V | 7.45 V (1.08%) | 2542.9 W | Drop High |
| 150 mm² | 309 A | 241 A | 3.61 V (0.52%) | 686.4 V | 5.96 V (0.86%) | 2034.3 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.93 V (0.42%) | 687.1 V | 4.83 V (0.7%) | 1649.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.26 V (0.33%) | 687.7 V | 3.73 V (0.54%) | 1271.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.81 V (0.26%) | 688.2 V | 2.98 V (0.43%) | 1017.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.36 V (0.2%) | 688.6 V | 2.24 V (0.32%) | 762.9 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 45 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 45 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 45m at 690V (voltage drop: 2.93V or 0.42%).
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 · 50m (690V)325A · 60m (690V)325A · 70m (690V)10A · 45m (690V)16A · 45m (690V)20A · 45m (690V)25A · 45m (690V)32A · 45m (690V)40A · 45m (690V)50A · 45m (690V)63A · 45m (690V)80A · 45m (690V)100A · 45m (690V)125A · 45m (690V)160A · 45m (690V)200A · 45m (690V)