325 Amp Cable Size at 70 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 70 m (229.7 ft).
Copper Cable (≤3% Drop)185 mm²Drop: 5.26V (2.29%)
Aluminum Cable (≤3% Drop)300 mm²Drop: 5.35V (2.33%)
Voltage at Load224.7 VLine Loss: 1710.6 W
Max Power & Breaker74.75 kW350A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 325A at 70m
| 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 | 649.13 V (282.23%) | 0.0 V | 1070.77 V (465.55%) | 210968.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 389.48 V (169.34%) | 0.0 V | 642.46 V (279.33%) | 126581.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 243.43 V (105.84%) | 0.0 V | 401.54 V (174.58%) | 79113.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 162.28 V (70.56%) | 67.7 V | 267.69 V (116.39%) | 52742.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 97.37 V (42.33%) | 132.6 V | 160.62 V (69.83%) | 31645.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 60.86 V (26.46%) | 169.1 V | 100.38 V (43.65%) | 19778.3 W | Drop High |
| 25 mm² | 101 A | 78 A | 38.95 V (16.93%) | 191.1 V | 64.25 V (27.93%) | 12658.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 27.82 V (12.1%) | 202.2 V | 45.89 V (19.95%) | 9041.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 19.47 V (8.47%) | 210.5 V | 32.12 V (13.97%) | 6329.1 W | Drop High |
| 70 mm² | 192 A | 150 A | 13.91 V (6.05%) | 216.1 V | 22.95 V (9.98%) | 4520.8 W | Drop High |
| 95 mm² | 232 A | 181 A | 10.25 V (4.46%) | 219.8 V | 16.91 V (7.35%) | 3331.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 8.11 V (3.53%) | 221.9 V | 13.38 V (5.82%) | 2637.1 W | Drop High |
| 150 mm² | 309 A | 241 A | 6.49 V (2.82%) | 223.5 V | 10.71 V (4.66%) | 2109.7 W | Drop High |
| 185 mm² | 353 A | 275 A | 5.26 V (2.29%) | 224.7 V | 8.68 V (3.77%) | 1710.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 4.06 V (1.76%) | 225.9 V | 6.69 V (2.91%) | 1318.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.25 V (1.41%) | 226.8 V | 5.35 V (2.33%) | 1054.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.43 V (1.06%) | 227.6 V | 4.02 V (1.75%) | 791.1 W | ✓ OK (≤3%) |
FAQ — 325 Amp Cable Size at 70 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 325A at 70 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 70m at 230V (voltage drop: 5.26V or 2.29%).
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 · 25m (230V)325A · 30m (230V)325A · 35m (230V)325A · 40m (230V)325A · 45m (230V)325A · 50m (230V)325A · 60m (230V)10A · 70m (230V)16A · 70m (230V)20A · 70m (230V)25A · 70m (230V)32A · 70m (230V)40A · 70m (230V)50A · 70m (230V)63A · 70m (230V)80A · 70m (230V)100A · 70m (230V)125A · 70m (230V)160A · 70m (230V)200A · 70m (230V)