325 Amp Cable Size at 15 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 15 m (49.2 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 0.98V (0.14%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 0.99V (0.14%)
Voltage at Load689.0 VLine Loss: 549.8 W
Max Power & Breaker388.41 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 15m
| 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 | 120.46 V (17.46%) | 569.5 V | 198.71 V (28.8%) | 67811.2 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 72.28 V (10.48%) | 617.7 V | 119.23 V (17.28%) | 40686.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 45.17 V (6.55%) | 644.8 V | 74.52 V (10.8%) | 25429.2 W | Drop High |
| 6 mm² | 41 A | 32 A | 30.12 V (4.36%) | 659.9 V | 49.68 V (7.2%) | 16952.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 18.07 V (2.62%) | 671.9 V | 29.81 V (4.32%) | 10171.7 W | Drop High |
| 16 mm² | 76 A | 59 A | 11.29 V (1.64%) | 678.7 V | 18.63 V (2.7%) | 6357.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 7.23 V (1.05%) | 682.8 V | 11.92 V (1.73%) | 4068.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 5.16 V (0.75%) | 684.8 V | 8.52 V (1.23%) | 2906.2 W | Drop High |
| 50 mm² | 151 A | 118 A | 3.61 V (0.52%) | 686.4 V | 5.96 V (0.86%) | 2034.3 W | Drop High |
| 70 mm² | 192 A | 150 A | 2.58 V (0.37%) | 687.4 V | 4.26 V (0.62%) | 1453.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.9 V (0.28%) | 688.1 V | 3.14 V (0.45%) | 1070.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 1.51 V (0.22%) | 688.5 V | 2.48 V (0.36%) | 847.6 W | Drop High |
| 150 mm² | 309 A | 241 A | 1.2 V (0.17%) | 688.8 V | 1.99 V (0.29%) | 678.1 W | Drop High |
| 185 mm² | 353 A | 275 A | 0.98 V (0.14%) | 689.0 V | 1.61 V (0.23%) | 549.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.75 V (0.11%) | 689.2 V | 1.24 V (0.18%) | 423.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.6 V (0.09%) | 689.4 V | 0.99 V (0.14%) | 339.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.45 V (0.07%) | 689.5 V | 0.75 V (0.11%) | 254.3 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 15 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 325A at 15 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 15m at 690V (voltage drop: 0.98V or 0.14%).
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 · 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 · 15m (690V)16A · 15m (690V)20A · 15m (690V)25A · 15m (690V)32A · 15m (690V)40A · 15m (690V)50A · 15m (690V)63A · 15m (690V)80A · 15m (690V)100A · 15m (690V)125A · 15m (690V)160A · 15m (690V)200A · 15m (690V)