40 Amp Cable Size at 80 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 80 m (262.5 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 5.48V (2.38%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 6.45V (2.81%)
Voltage at Load224.5 VLine Loss: 219.1 W
Max Power & Breaker9.2 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 80m
| 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 | 91.31 V (39.7%) | 138.7 V | 150.61 V (65.48%) | 3652.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 54.78 V (23.82%) | 175.2 V | 90.37 V (39.29%) | 2191.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 34.24 V (14.89%) | 195.8 V | 56.48 V (24.56%) | 1369.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 22.83 V (9.92%) | 207.2 V | 37.65 V (16.37%) | 913.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 13.7 V (5.95%) | 216.3 V | 22.59 V (9.82%) | 547.8 W | Drop High |
| 16 mm² | 76 A | 59 A | 8.56 V (3.72%) | 221.4 V | 14.12 V (6.14%) | 342.4 W | ~ ≤5% |
| 25 mm² | 101 A | 78 A | 5.48 V (2.38%) | 224.5 V | 9.04 V (3.93%) | 219.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 3.91 V (1.7%) | 226.1 V | 6.45 V (2.81%) | 156.5 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 2.74 V (1.19%) | 227.3 V | 4.52 V (1.96%) | 109.6 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.96 V (0.85%) | 228.0 V | 3.23 V (1.4%) | 78.3 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.44 V (0.63%) | 228.6 V | 2.38 V (1.03%) | 57.7 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.14 V (0.5%) | 228.9 V | 1.88 V (0.82%) | 45.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.91 V (0.4%) | 229.1 V | 1.51 V (0.65%) | 36.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.74 V (0.32%) | 229.3 V | 1.22 V (0.53%) | 29.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.57 V (0.25%) | 229.4 V | 0.94 V (0.41%) | 22.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.46 V (0.2%) | 229.5 V | 0.75 V (0.33%) | 18.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.34 V (0.15%) | 229.7 V | 0.56 V (0.25%) | 13.7 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 80 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 40A at 80 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 40A over 80m at 230V (voltage drop: 5.48V or 2.38%).
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 · 30m (230V)40A · 35m (230V)40A · 40m (230V)40A · 45m (230V)40A · 50m (230V)40A · 60m (230V)40A · 70m (230V)10A · 80m (230V)16A · 80m (230V)20A · 80m (230V)25A · 80m (230V)32A · 80m (230V)50A · 80m (230V)63A · 80m (230V)80A · 80m (230V)100A · 80m (230V)125A · 80m (230V)160A · 80m (230V)200A · 80m (230V)