15 Amp Cable Size at 300 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 15 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 10.42V (2.61%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 11.01V (2.75%)
Voltage at Load389.6 VLine Loss: 270.8 W
Max Power & Breaker10.39 kW15A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 15A 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 | 111.2 V (27.8%) | 288.8 V | 183.42 V (45.86%) | 2889.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 66.72 V (16.68%) | 333.3 V | 110.05 V (27.51%) | 1733.4 W | Drop High |
| 4 mm² | 32 A | 25 A | 41.7 V (10.42%) | 358.3 V | 68.78 V (17.2%) | 1083.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 27.8 V (6.95%) | 372.2 V | 45.86 V (11.46%) | 722.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 16.68 V (4.17%) | 383.3 V | 27.51 V (6.88%) | 433.4 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 10.42 V (2.61%) | 389.6 V | 17.2 V (4.3%) | 270.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 6.67 V (1.67%) | 393.3 V | 11.01 V (2.75%) | 173.3 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 4.77 V (1.19%) | 395.2 V | 7.86 V (1.97%) | 123.8 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.34 V (0.83%) | 396.7 V | 5.5 V (1.38%) | 86.7 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.38 V (0.6%) | 397.6 V | 3.93 V (0.98%) | 61.9 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.76 V (0.44%) | 398.2 V | 2.9 V (0.72%) | 45.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.39 V (0.35%) | 398.6 V | 2.29 V (0.57%) | 36.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.11 V (0.28%) | 398.9 V | 1.83 V (0.46%) | 28.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.9 V (0.23%) | 399.1 V | 1.49 V (0.37%) | 23.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.69 V (0.17%) | 399.3 V | 1.15 V (0.29%) | 18.1 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.56 V (0.14%) | 399.4 V | 0.92 V (0.23%) | 14.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.42 V (0.1%) | 399.6 V | 0.69 V (0.17%) | 10.8 W | ✓ OK (≤3%) |
FAQ — 15 Amp Cable Size at 300 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 15A at 300 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 15A over 300m at 400V (voltage drop: 10.42V or 2.61%).
What is the power capacity of 15A at 400V?
At unity power factor, 15A at 400V supports 10.39 kW with a standard 15A circuit breaker.
Related Lengths & Currents (400V)
15A · 5m (400V)15A · 10m (400V)15A · 15m (400V)15A · 20m (400V)15A · 25m (400V)15A · 30m (400V)15A · 35m (400V)15A · 40m (400V)15A · 45m (400V)15A · 50m (400V)15A · 60m (400V)15A · 70m (400V)10A · 300m (400V)16A · 300m (400V)20A · 300m (400V)25A · 300m (400V)32A · 300m (400V)40A · 300m (400V)50A · 300m (400V)63A · 300m (400V)80A · 300m (400V)100A · 300m (400V)125A · 300m (400V)160A · 300m (400V)200A · 300m (400V)