16 Amp Cable Size at 20 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 16 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)1.5 mm²Drop: 7.91V (1.91%)
Aluminum Cable (≤3% Drop)2.5 mm²Drop: 7.83V (1.89%)
Voltage at Load407.1 VLine Loss: 219.1 W
Max Power & Breaker11.5 kW16A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 16A 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 | 7.91 V (1.91%) | 407.1 V | 13.04 V (3.14%) | 219.1 W | ✓ OK (≤3%) |
| 2.5 mm² | 24 A | 18 A | 4.74 V (1.14%) | 410.3 V | 7.83 V (1.89%) | 131.5 W | ✓ OK (≤3%) |
| 4 mm² | 32 A | 25 A | 2.97 V (0.71%) | 412.0 V | 4.89 V (1.18%) | 82.2 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 1.98 V (0.48%) | 413.0 V | 3.26 V (0.79%) | 54.8 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 1.19 V (0.29%) | 413.8 V | 1.96 V (0.47%) | 32.9 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 0.74 V (0.18%) | 414.3 V | 1.22 V (0.29%) | 20.5 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.47 V (0.11%) | 414.5 V | 0.78 V (0.19%) | 13.1 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.34 V (0.08%) | 414.7 V | 0.56 V (0.13%) | 9.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.24 V (0.06%) | 414.8 V | 0.39 V (0.09%) | 6.6 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.17 V (0.04%) | 414.8 V | 0.28 V (0.07%) | 4.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.12 V (0.03%) | 414.9 V | 0.21 V (0.05%) | 3.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.1 V (0.02%) | 414.9 V | 0.16 V (0.04%) | 2.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.08 V (0.02%) | 414.9 V | 0.13 V (0.03%) | 2.2 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.06 V (0.02%) | 414.9 V | 0.11 V (0.03%) | 1.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.05 V (0.01%) | 415.0 V | 0.08 V (0.02%) | 1.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.04 V (0.01%) | 415.0 V | 0.07 V (0.02%) | 1.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.03 V (0.01%) | 415.0 V | 0.05 V (0.01%) | 0.8 W | ✓ OK (≤3%) |
FAQ — 16 Amp Cable Size at 20 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 16A at 20 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 1.5 mm² copper cable for 16A over 20m at 415V (voltage drop: 7.91V or 1.91%).
What is the power capacity of 16A at 415V?
At unity power factor, 16A at 415V supports 11.5 kW with a standard 16A circuit breaker.
Related Lengths & Currents (415V)
16A · 5m (415V)16A · 10m (415V)16A · 15m (415V)16A · 25m (415V)16A · 30m (415V)16A · 35m (415V)16A · 40m (415V)16A · 45m (415V)16A · 50m (415V)16A · 60m (415V)16A · 70m (415V)10A · 20m (415V)20A · 20m (415V)25A · 20m (415V)32A · 20m (415V)40A · 20m (415V)50A · 20m (415V)63A · 20m (415V)80A · 20m (415V)100A · 20m (415V)125A · 20m (415V)160A · 20m (415V)200A · 20m (415V)