63 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 63 A over 20 m (65.6 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 2.92V (0.42%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 3.08V (0.45%)
Voltage at Load687.1 VLine Loss: 318.5 W
Max Power & Breaker75.29 kW63A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 63A 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 | 31.14 V (4.51%) | 658.9 V | 51.36 V (7.44%) | 3397.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 18.68 V (2.71%) | 671.3 V | 30.82 V (4.47%) | 2038.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 11.68 V (1.69%) | 678.3 V | 19.26 V (2.79%) | 1274.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 7.78 V (1.13%) | 682.2 V | 12.84 V (1.86%) | 849.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 4.67 V (0.68%) | 685.3 V | 7.7 V (1.12%) | 509.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 2.92 V (0.42%) | 687.1 V | 4.81 V (0.7%) | 318.5 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 1.87 V (0.27%) | 688.1 V | 3.08 V (0.45%) | 203.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.33 V (0.19%) | 688.7 V | 2.2 V (0.32%) | 145.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 0.93 V (0.14%) | 689.1 V | 1.54 V (0.22%) | 101.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.67 V (0.1%) | 689.3 V | 1.1 V (0.16%) | 72.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.49 V (0.07%) | 689.5 V | 0.81 V (0.12%) | 53.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.39 V (0.06%) | 689.6 V | 0.64 V (0.09%) | 42.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.31 V (0.05%) | 689.7 V | 0.51 V (0.07%) | 34.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.25 V (0.04%) | 689.7 V | 0.42 V (0.06%) | 27.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.19 V (0.03%) | 689.8 V | 0.32 V (0.05%) | 21.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.16 V (0.02%) | 689.8 V | 0.26 V (0.04%) | 17.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.12 V (0.02%) | 689.9 V | 0.19 V (0.03%) | 12.7 W | ✓ OK (≤3%) |
FAQ — 63 Amp Cable Size at 20 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 63A at 20 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 63A over 20m at 690V (voltage drop: 2.92V or 0.42%).
What is the power capacity of 63A at 690V?
At unity power factor, 63A at 690V supports 75.29 kW with a standard 63A circuit breaker.
Related Lengths & Currents (690V)
63A · 5m (690V)63A · 10m (690V)63A · 15m (690V)63A · 25m (690V)63A · 30m (690V)63A · 35m (690V)63A · 40m (690V)63A · 45m (690V)63A · 50m (690V)63A · 60m (690V)63A · 70m (690V)10A · 20m (690V)16A · 20m (690V)20A · 20m (690V)25A · 20m (690V)32A · 20m (690V)40A · 20m (690V)50A · 20m (690V)80A · 20m (690V)100A · 20m (690V)125A · 20m (690V)160A · 20m (690V)200A · 20m (690V)