5 Amp Cable Size at 70 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 5 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)1.5 mm²Drop: 8.65V (2.16%)
Aluminum Cable (≤3% Drop)2.5 mm²Drop: 8.56V (2.14%)
Voltage at Load391.4 VLine Loss: 74.9 W
Max Power & Breaker3.46 kW6A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 5A at 70m
| 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 | 8.65 V (2.16%) | 391.4 V | 14.27 V (3.57%) | 74.9 W | ✓ OK (≤3%) |
| 2.5 mm² | 24 A | 18 A | 5.19 V (1.3%) | 394.8 V | 8.56 V (2.14%) | 44.9 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 3.24 V (0.81%) | 396.8 V | 5.35 V (1.34%) | 28.1 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 2.16 V (0.54%) | 397.8 V | 3.57 V (0.89%) | 18.7 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 1.3 V (0.32%) | 398.7 V | 2.14 V (0.53%) | 11.2 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 0.81 V (0.2%) | 399.2 V | 1.34 V (0.33%) | 7.0 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.52 V (0.13%) | 399.5 V | 0.86 V (0.21%) | 4.5 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.37 V (0.09%) | 399.6 V | 0.61 V (0.15%) | 3.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.26 V (0.06%) | 399.7 V | 0.43 V (0.11%) | 2.2 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.19 V (0.05%) | 399.8 V | 0.31 V (0.08%) | 1.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.14 V (0.03%) | 399.9 V | 0.23 V (0.06%) | 1.2 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.11 V (0.03%) | 399.9 V | 0.18 V (0.04%) | 0.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.09 V (0.02%) | 399.9 V | 0.14 V (0.04%) | 0.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.07 V (0.02%) | 399.9 V | 0.12 V (0.03%) | 0.6 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.05 V (0.01%) | 399.9 V | 0.09 V (0.02%) | 0.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.04 V (0.01%) | 400.0 V | 0.07 V (0.02%) | 0.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.03 V (0.01%) | 400.0 V | 0.05 V (0.01%) | 0.3 W | ✓ OK (≤3%) |
FAQ — 5 Amp Cable Size at 70 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 5A at 70 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 1.5 mm² copper cable for 5A over 70m at 400V (voltage drop: 8.65V or 2.16%).
What is the power capacity of 5A at 400V?
At unity power factor, 5A at 400V supports 3.46 kW with a standard 6A circuit breaker.
Related Lengths & Currents (400V)
5A · 5m (400V)5A · 10m (400V)5A · 15m (400V)5A · 20m (400V)5A · 25m (400V)5A · 30m (400V)5A · 35m (400V)5A · 40m (400V)5A · 45m (400V)5A · 50m (400V)5A · 60m (400V)10A · 70m (400V)16A · 70m (400V)20A · 70m (400V)25A · 70m (400V)32A · 70m (400V)40A · 70m (400V)50A · 70m (400V)63A · 70m (400V)80A · 70m (400V)100A · 70m (400V)125A · 70m (400V)160A · 70m (400V)200A · 70m (400V)