325 Amp Cable Size at 25 Meters (230V Single-Phase (IEC Europe / UK / AU))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 325 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 1.88V (0.82%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 1.91V (0.83%)
Voltage at Load228.1 VLine Loss: 610.9 W
Max Power & Breaker74.75 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 25m
| 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 | 231.83 V (100.8%) | 0.0 V | 382.42 V (166.27%) | 75345.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 139.1 V (60.48%) | 90.9 V | 229.45 V (99.76%) | 45207.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 86.94 V (37.8%) | 143.1 V | 143.41 V (62.35%) | 28254.7 W | Drop High |
| 6 mm² | 41 A | 32 A | 57.96 V (25.2%) | 172.0 V | 95.6 V (41.57%) | 18836.5 W | Drop High |
| 10 mm² | 57 A | 44 A | 34.77 V (15.12%) | 195.2 V | 57.36 V (24.94%) | 11301.9 W | Drop High |
| 16 mm² | 76 A | 59 A | 21.73 V (9.45%) | 208.3 V | 35.85 V (15.59%) | 7063.7 W | Drop High |
| 25 mm² | 101 A | 78 A | 13.91 V (6.05%) | 216.1 V | 22.95 V (9.98%) | 4520.7 W | Drop High |
| 35 mm² | 125 A | 97 A | 9.94 V (4.32%) | 220.1 V | 16.39 V (7.13%) | 3229.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 6.95 V (3.02%) | 223.0 V | 11.47 V (4.99%) | 2260.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 4.97 V (2.16%) | 225.0 V | 8.19 V (3.56%) | 1614.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 3.66 V (1.59%) | 226.3 V | 6.04 V (2.63%) | 1189.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 2.9 V (1.26%) | 227.1 V | 4.78 V (2.08%) | 941.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.32 V (1.01%) | 227.7 V | 3.82 V (1.66%) | 753.5 W | Drop High |
| 185 mm² | 353 A | 275 A | 1.88 V (0.82%) | 228.1 V | 3.1 V (1.35%) | 610.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.45 V (0.63%) | 228.6 V | 2.39 V (1.04%) | 470.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.16 V (0.5%) | 228.8 V | 1.91 V (0.83%) | 376.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.87 V (0.38%) | 229.1 V | 1.43 V (0.62%) | 282.5 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 25 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 325A at 25 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 185 mm² copper cable for 325A over 25m at 230V (voltage drop: 1.88V or 0.82%).
What is the power capacity of 325A at 230V?
At unity power factor, 325A at 230V supports 74.75 kW with a standard 350A circuit breaker.
Related Lengths & Currents (230V)
325A · 5m (230V)325A · 10m (230V)325A · 15m (230V)325A · 20m (230V)325A · 30m (230V)325A · 35m (230V)325A · 40m (230V)325A · 45m (230V)325A · 50m (230V)325A · 60m (230V)325A · 70m (230V)10A · 25m (230V)16A · 25m (230V)20A · 25m (230V)25A · 25m (230V)32A · 25m (230V)40A · 25m (230V)50A · 25m (230V)63A · 25m (230V)80A · 25m (230V)100A · 25m (230V)125A · 25m (230V)160A · 25m (230V)200A · 25m (230V)