63 Amp Cable Size at 25 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 25 m (82.0 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 3.65V (0.53%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 3.85V (0.56%)
Voltage at Load686.4 VLine Loss: 398.1 W
Max Power & Breaker75.29 kW63A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 63A at 25m
| 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 | 38.92 V (5.64%) | 651.1 V | 64.2 V (9.3%) | 4246.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 23.35 V (3.38%) | 666.6 V | 38.52 V (5.58%) | 2548.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 14.59 V (2.12%) | 675.4 V | 24.07 V (3.49%) | 1592.6 W | Drop High |
| 6 mm² | 41 A | 32 A | 9.73 V (1.41%) | 680.3 V | 16.05 V (2.33%) | 1061.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.84 V (0.85%) | 684.2 V | 9.63 V (1.4%) | 637.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.65 V (0.53%) | 686.4 V | 6.02 V (0.87%) | 398.1 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 2.34 V (0.34%) | 687.7 V | 3.85 V (0.56%) | 254.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.67 V (0.24%) | 688.3 V | 2.75 V (0.4%) | 182.0 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.17 V (0.17%) | 688.8 V | 1.93 V (0.28%) | 127.4 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.83 V (0.12%) | 689.2 V | 1.38 V (0.2%) | 91.0 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.61 V (0.09%) | 689.4 V | 1.01 V (0.15%) | 67.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.49 V (0.07%) | 689.5 V | 0.8 V (0.12%) | 53.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.39 V (0.06%) | 689.6 V | 0.64 V (0.09%) | 42.5 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.32 V (0.05%) | 689.7 V | 0.52 V (0.08%) | 34.4 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.24 V (0.04%) | 689.8 V | 0.4 V (0.06%) | 26.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.19 V (0.03%) | 689.8 V | 0.32 V (0.05%) | 21.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.15 V (0.02%) | 689.9 V | 0.24 V (0.03%) | 15.9 W | ✓ OK (≤3%) |
FAQ — 63 Amp Cable Size at 25 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 63A at 25 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 25m at 690V (voltage drop: 3.65V or 0.53%).
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 · 20m (690V)63A · 30m (690V)63A · 35m (690V)63A · 40m (690V)63A · 45m (690V)63A · 50m (690V)63A · 60m (690V)63A · 70m (690V)10A · 25m (690V)16A · 25m (690V)20A · 25m (690V)25A · 25m (690V)32A · 25m (690V)40A · 25m (690V)50A · 25m (690V)80A · 25m (690V)100A · 25m (690V)125A · 25m (690V)160A · 25m (690V)200A · 25m (690V)