10 Amp Cable Size at 20 Meters (400V Three-Phase (IEC European Grid))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 10 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)1.5 mm²Drop: 4.94V (1.24%)
Aluminum Cable (≤3% Drop)1.5 mm²Drop: 8.15V (2.04%)
Voltage at Load395.1 VLine Loss: 85.6 W
Max Power & Breaker6.93 kW10A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 10A at 20m
| 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 | 4.94 V (1.24%) | 395.1 V | 8.15 V (2.04%) | 85.6 W | ✓ OK (≤3%) |
| 2.5 mm² | 24 A | 18 A | 2.97 V (0.74%) | 397.0 V | 4.89 V (1.22%) | 51.4 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 1.85 V (0.46%) | 398.1 V | 3.06 V (0.76%) | 32.1 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 1.24 V (0.31%) | 398.8 V | 2.04 V (0.51%) | 21.4 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 0.74 V (0.19%) | 399.3 V | 1.22 V (0.31%) | 12.8 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 0.46 V (0.12%) | 399.5 V | 0.76 V (0.19%) | 8.0 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.3 V (0.07%) | 399.7 V | 0.49 V (0.12%) | 5.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.21 V (0.05%) | 399.8 V | 0.35 V (0.09%) | 3.7 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.15 V (0.04%) | 399.9 V | 0.24 V (0.06%) | 2.6 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.11 V (0.03%) | 399.9 V | 0.17 V (0.04%) | 1.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.08 V (0.02%) | 399.9 V | 0.13 V (0.03%) | 1.4 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.06 V (0.02%) | 399.9 V | 0.1 V (0.03%) | 1.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.05 V (0.01%) | 400.0 V | 0.08 V (0.02%) | 0.9 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.04 V (0.01%) | 400.0 V | 0.07 V (0.02%) | 0.7 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.03 V (0.01%) | 400.0 V | 0.05 V (0.01%) | 0.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.02 V (0.01%) | 400.0 V | 0.04 V (0.01%) | 0.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.02 V (0.0%) | 400.0 V | 0.03 V (0.01%) | 0.3 W | ✓ OK (≤3%) |
FAQ — 10 Amp Cable Size at 20 Meters (400V Three-Phase (IEC European Grid))
What mm² cable size is required for 10A at 20 meters (400V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 1.5 mm² copper cable for 10A over 20m at 400V (voltage drop: 4.94V or 1.24%).
What is the power capacity of 10A at 400V?
At unity power factor, 10A at 400V supports 6.93 kW with a standard 10A circuit breaker.
Related Lengths & Currents (400V)
10A · 5m (400V)10A · 10m (400V)10A · 15m (400V)10A · 25m (400V)10A · 30m (400V)10A · 35m (400V)10A · 40m (400V)10A · 45m (400V)10A · 50m (400V)10A · 60m (400V)10A · 70m (400V)16A · 20m (400V)20A · 20m (400V)25A · 20m (400V)32A · 20m (400V)40A · 20m (400V)50A · 20m (400V)63A · 20m (400V)80A · 20m (400V)100A · 20m (400V)125A · 20m (400V)160A · 20m (400V)200A · 20m (400V)