32 Amp Cable Size at 20 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 32 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)4 mm²Drop: 5.93V (0.86%)
Aluminum Cable (≤3% Drop)6 mm²Drop: 6.52V (0.95%)
Voltage at Load684.1 VLine Loss: 328.7 W
Max Power & Breaker38.24 kW32A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 32A 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 | 15.81 V (2.29%) | 674.2 V | 26.09 V (3.78%) | 876.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 9.49 V (1.38%) | 680.5 V | 15.65 V (2.27%) | 525.9 W | Drop High |
| 4 mm² | 32 A | 25 A | 5.93 V (0.86%) | 684.1 V | 9.78 V (1.42%) | 328.7 W | ✓ OK (≤3%) |
| 6 mm² | 41 A | 32 A | 3.95 V (0.57%) | 686.0 V | 6.52 V (0.95%) | 219.1 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 2.37 V (0.34%) | 687.6 V | 3.91 V (0.57%) | 131.5 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 1.48 V (0.21%) | 688.5 V | 2.45 V (0.35%) | 82.2 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 0.95 V (0.14%) | 689.1 V | 1.57 V (0.23%) | 52.6 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 0.68 V (0.1%) | 689.3 V | 1.12 V (0.16%) | 37.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.47 V (0.07%) | 689.5 V | 0.78 V (0.11%) | 26.3 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.34 V (0.05%) | 689.7 V | 0.56 V (0.08%) | 18.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.25 V (0.04%) | 689.8 V | 0.41 V (0.06%) | 13.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.2 V (0.03%) | 689.8 V | 0.33 V (0.05%) | 11.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.16 V (0.02%) | 689.8 V | 0.26 V (0.04%) | 8.8 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.13 V (0.02%) | 689.9 V | 0.21 V (0.03%) | 7.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.1 V (0.01%) | 689.9 V | 0.16 V (0.02%) | 5.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.08 V (0.01%) | 689.9 V | 0.13 V (0.02%) | 4.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.06 V (0.01%) | 689.9 V | 0.1 V (0.01%) | 3.3 W | ✓ OK (≤3%) |
FAQ — 32 Amp Cable Size at 20 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 32A at 20 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4 mm² copper cable for 32A over 20m at 690V (voltage drop: 5.93V or 0.86%).
What is the power capacity of 32A at 690V?
At unity power factor, 32A at 690V supports 38.24 kW with a standard 32A circuit breaker.
Related Lengths & Currents (690V)
32A · 5m (690V)32A · 10m (690V)32A · 15m (690V)32A · 25m (690V)32A · 30m (690V)32A · 35m (690V)32A · 40m (690V)32A · 45m (690V)32A · 50m (690V)32A · 60m (690V)32A · 70m (690V)10A · 20m (690V)16A · 20m (690V)20A · 20m (690V)25A · 20m (690V)40A · 20m (690V)50A · 20m (690V)63A · 20m (690V)80A · 20m (690V)100A · 20m (690V)125A · 20m (690V)160A · 20m (690V)200A · 20m (690V)