25 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 25 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)6 mm²Drop: 13.9V (2.01%)
Aluminum Cable (≤3% Drop)10 mm²Drop: 13.76V (1.99%)
Voltage at Load676.1 VLine Loss: 601.9 W
Max Power & Breaker29.88 kW25A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A at 90m
| 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 | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 2407.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 1444.5 W | Drop High |
| 4 mm² | 32 A | 25 A | 20.85 V (3.02%) | 669.2 V | 34.39 V (4.98%) | 902.8 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 601.9 W | ✓ OK (≤3%) |
| 10 mm² | 57 A | 44 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 361.1 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 5.21 V (0.76%) | 684.8 V | 8.6 V (1.25%) | 225.7 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.34 V (0.48%) | 686.7 V | 5.5 V (0.8%) | 144.4 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.38 V (0.35%) | 687.6 V | 3.93 V (0.57%) | 103.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.67 V (0.24%) | 688.3 V | 2.75 V (0.4%) | 72.2 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.19 V (0.17%) | 688.8 V | 1.97 V (0.28%) | 51.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.88 V (0.13%) | 689.1 V | 1.45 V (0.21%) | 38.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.69 V (0.1%) | 689.3 V | 1.15 V (0.17%) | 30.1 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.56 V (0.08%) | 689.4 V | 0.92 V (0.13%) | 24.1 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.45 V (0.07%) | 689.5 V | 0.74 V (0.11%) | 19.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.35 V (0.05%) | 689.7 V | 0.57 V (0.08%) | 15.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.28 V (0.04%) | 689.7 V | 0.46 V (0.07%) | 12.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.21 V (0.03%) | 689.8 V | 0.34 V (0.05%) | 9.0 W | ✓ OK (≤3%) |
FAQ — 25 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 25A at 90 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 6 mm² copper cable for 25A over 90m at 690V (voltage drop: 13.9V or 2.01%).
What is the power capacity of 25A at 690V?
At unity power factor, 25A at 690V supports 29.88 kW with a standard 25A circuit breaker.
Related Lengths & Currents (690V)
25A · 5m (690V)25A · 10m (690V)25A · 15m (690V)25A · 20m (690V)25A · 25m (690V)25A · 30m (690V)25A · 35m (690V)25A · 40m (690V)25A · 45m (690V)25A · 50m (690V)25A · 60m (690V)25A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)32A · 90m (690V)40A · 90m (690V)50A · 90m (690V)63A · 90m (690V)80A · 90m (690V)100A · 90m (690V)125A · 90m (690V)160A · 90m (690V)200A · 90m (690V)