30 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 30 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)6 mm²Drop: 5.35V (2.33%)
Aluminum Cable (≤3% Drop)10 mm²Drop: 5.29V (2.3%)
Voltage at Load224.7 VLine Loss: 160.5 W
Max Power & Breaker6.9 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A 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 | 21.4 V (9.3%) | 208.6 V | 35.3 V (15.35%) | 642.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 12.84 V (5.58%) | 217.2 V | 21.18 V (9.21%) | 385.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 8.02 V (3.49%) | 222.0 V | 13.24 V (5.76%) | 240.7 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 5.35 V (2.33%) | 224.7 V | 8.82 V (3.84%) | 160.5 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 3.21 V (1.4%) | 226.8 V | 5.29 V (2.3%) | 96.3 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 2.01 V (0.87%) | 228.0 V | 3.31 V (1.44%) | 60.2 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.28 V (0.56%) | 228.7 V | 2.12 V (0.92%) | 38.5 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.92 V (0.4%) | 229.1 V | 1.51 V (0.66%) | 27.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.64 V (0.28%) | 229.4 V | 1.06 V (0.46%) | 19.3 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.46 V (0.2%) | 229.5 V | 0.76 V (0.33%) | 13.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.34 V (0.15%) | 229.7 V | 0.56 V (0.24%) | 10.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.27 V (0.12%) | 229.7 V | 0.44 V (0.19%) | 8.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.21 V (0.09%) | 229.8 V | 0.35 V (0.15%) | 6.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.17 V (0.08%) | 229.8 V | 0.29 V (0.12%) | 5.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.13 V (0.06%) | 229.9 V | 0.22 V (0.1%) | 4.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.11 V (0.05%) | 229.9 V | 0.18 V (0.08%) | 3.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.08 V (0.03%) | 229.9 V | 0.13 V (0.06%) | 2.4 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 25 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 30A at 25 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 6 mm² copper cable for 30A over 25m at 230V (voltage drop: 5.35V or 2.33%).
What is the power capacity of 30A at 230V?
At unity power factor, 30A at 230V supports 6.9 kW with a standard 30A circuit breaker.
Related Lengths & Currents (230V)
30A · 5m (230V)30A · 10m (230V)30A · 15m (230V)30A · 20m (230V)30A · 30m (230V)30A · 35m (230V)30A · 40m (230V)30A · 45m (230V)30A · 50m (230V)30A · 60m (230V)30A · 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)