40 Amp Cable Size at 30 Meters (230V Single-Phase (IEC Europe / UK / AU))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 40 A over 30 m (98.4 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 5.14V (2.23%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 5.29V (2.3%)
Voltage at Load224.9 VLine Loss: 205.4 W
Max Power & Breaker9.2 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 30m
| 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 | 34.24 V (14.89%) | 195.8 V | 56.48 V (24.56%) | 1369.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 20.54 V (8.93%) | 209.5 V | 33.89 V (14.73%) | 821.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 12.84 V (5.58%) | 217.2 V | 21.18 V (9.21%) | 513.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 8.56 V (3.72%) | 221.4 V | 14.12 V (6.14%) | 342.4 W | ~ ≤5% |
| 10 mm² | 57 A | 44 A | 5.14 V (2.23%) | 224.9 V | 8.47 V (3.68%) | 205.4 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 3.21 V (1.4%) | 226.8 V | 5.29 V (2.3%) | 128.4 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 2.05 V (0.89%) | 227.9 V | 3.39 V (1.47%) | 82.2 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.47 V (0.64%) | 228.5 V | 2.42 V (1.05%) | 58.7 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.03 V (0.45%) | 229.0 V | 1.69 V (0.74%) | 41.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.73 V (0.32%) | 229.3 V | 1.21 V (0.53%) | 29.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.54 V (0.24%) | 229.5 V | 0.89 V (0.39%) | 21.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.43 V (0.19%) | 229.6 V | 0.71 V (0.31%) | 17.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.34 V (0.15%) | 229.7 V | 0.56 V (0.25%) | 13.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.28 V (0.12%) | 229.7 V | 0.46 V (0.2%) | 11.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.21 V (0.09%) | 229.8 V | 0.35 V (0.15%) | 8.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.17 V (0.07%) | 229.8 V | 0.28 V (0.12%) | 6.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.13 V (0.06%) | 229.9 V | 0.21 V (0.09%) | 5.1 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 30 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 40A at 30 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 40A over 30m at 230V (voltage drop: 5.14V or 2.23%).
What is the power capacity of 40A at 230V?
At unity power factor, 40A at 230V supports 9.2 kW with a standard 40A circuit breaker.
Related Lengths & Currents (230V)
40A · 5m (230V)40A · 10m (230V)40A · 15m (230V)40A · 20m (230V)40A · 25m (230V)40A · 35m (230V)40A · 40m (230V)40A · 45m (230V)40A · 50m (230V)40A · 60m (230V)40A · 70m (230V)10A · 30m (230V)16A · 30m (230V)20A · 30m (230V)25A · 30m (230V)32A · 30m (230V)50A · 30m (230V)63A · 30m (230V)80A · 30m (230V)100A · 30m (230V)125A · 30m (230V)160A · 30m (230V)200A · 30m (230V)