40 Amp Cable Size at 300 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 300 m (984.3 ft).
Copper Cable (≤3% Drop)95 mm²Drop: 5.41V (2.35%)
Aluminum Cable (≤3% Drop)150 mm²Drop: 5.65V (2.46%)
Voltage at Load224.6 VLine Loss: 216.3 W
Max Power & Breaker9.2 kW40A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 40A at 300m
| 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 | 342.4 V (148.87%) | 0.0 V | 564.8 V (245.57%) | 13696.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 205.44 V (89.32%) | 24.6 V | 338.88 V (147.34%) | 8217.6 W | Drop High |
| 4 mm² | 32 A | 25 A | 128.4 V (55.83%) | 101.6 V | 211.8 V (92.09%) | 5136.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 85.6 V (37.22%) | 144.4 V | 141.2 V (61.39%) | 3424.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 51.36 V (22.33%) | 178.6 V | 84.72 V (36.83%) | 2054.4 W | Drop High |
| 16 mm² | 76 A | 59 A | 32.1 V (13.96%) | 197.9 V | 52.95 V (23.02%) | 1284.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 20.54 V (8.93%) | 209.5 V | 33.89 V (14.73%) | 821.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 14.67 V (6.38%) | 215.3 V | 24.21 V (10.52%) | 587.0 W | Drop High |
| 50 mm² | 151 A | 118 A | 10.27 V (4.47%) | 219.7 V | 16.94 V (7.37%) | 410.9 W | ~ ≤5% |
| 70 mm² | 192 A | 150 A | 7.34 V (3.19%) | 222.7 V | 12.1 V (5.26%) | 293.5 W | ~ ≤5% |
| 95 mm² | 232 A | 181 A | 5.41 V (2.35%) | 224.6 V | 8.92 V (3.88%) | 216.3 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 4.28 V (1.86%) | 225.7 V | 7.06 V (3.07%) | 171.2 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 3.42 V (1.49%) | 226.6 V | 5.65 V (2.46%) | 137.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 2.78 V (1.21%) | 227.2 V | 4.58 V (1.99%) | 111.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.14 V (0.93%) | 227.9 V | 3.53 V (1.53%) | 85.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.71 V (0.74%) | 228.3 V | 2.82 V (1.23%) | 68.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.28 V (0.56%) | 228.7 V | 2.12 V (0.92%) | 51.4 W | ✓ OK (≤3%) |
FAQ — 40 Amp Cable Size at 300 Meters (230V Single-Phase (IEC Europe / UK / AU))
What mm² cable size is required for 40A at 300 meters (230V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 95 mm² copper cable for 40A over 300m at 230V (voltage drop: 5.41V or 2.35%).
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 · 300m (230V)16A · 300m (230V)20A · 300m (230V)25A · 300m (230V)32A · 300m (230V)50A · 300m (230V)63A · 300m (230V)80A · 300m (230V)100A · 300m (230V)125A · 300m (230V)160A · 300m (230V)200A · 300m (230V)