90 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 90 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 3.34V (0.48%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 3.93V (0.57%)
Voltage at Load686.7 VLine Loss: 520.0 W
Max Power & Breaker107.56 kW90A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 90A 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 | 55.6 V (8.06%) | 634.4 V | 91.71 V (13.29%) | 8667.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 33.36 V (4.83%) | 656.6 V | 55.03 V (7.97%) | 5200.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 20.85 V (3.02%) | 669.2 V | 34.39 V (4.98%) | 3250.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 2166.8 W | Drop High |
| 10 mm² | 57 A | 44 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 1300.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 5.21 V (0.76%) | 684.8 V | 8.6 V (1.25%) | 812.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 3.34 V (0.48%) | 686.7 V | 5.5 V (0.8%) | 520.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.38 V (0.35%) | 687.6 V | 3.93 V (0.57%) | 371.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.67 V (0.24%) | 688.3 V | 2.75 V (0.4%) | 260.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.19 V (0.17%) | 688.8 V | 1.97 V (0.28%) | 185.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.88 V (0.13%) | 689.1 V | 1.45 V (0.21%) | 136.8 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.69 V (0.1%) | 689.3 V | 1.15 V (0.17%) | 108.3 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.56 V (0.08%) | 689.4 V | 0.92 V (0.13%) | 86.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.45 V (0.07%) | 689.5 V | 0.74 V (0.11%) | 70.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.35 V (0.05%) | 689.7 V | 0.57 V (0.08%) | 54.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.28 V (0.04%) | 689.7 V | 0.46 V (0.07%) | 43.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.21 V (0.03%) | 689.8 V | 0.34 V (0.05%) | 32.5 W | ✓ OK (≤3%) |
FAQ — 90 Amp Cable Size at 25 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 90A at 25 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 90A over 25m at 690V (voltage drop: 3.34V or 0.48%).
What is the power capacity of 90A at 690V?
At unity power factor, 90A at 690V supports 107.56 kW with a standard 90A circuit breaker.
Related Lengths & Currents (690V)
90A · 5m (690V)90A · 10m (690V)90A · 15m (690V)90A · 20m (690V)90A · 30m (690V)90A · 35m (690V)90A · 40m (690V)90A · 45m (690V)90A · 50m (690V)90A · 60m (690V)90A · 70m (690V)10A · 25m (690V)16A · 25m (690V)20A · 25m (690V)25A · 25m (690V)32A · 25m (690V)40A · 25m (690V)50A · 25m (690V)63A · 25m (690V)80A · 25m (690V)100A · 25m (690V)125A · 25m (690V)160A · 25m (690V)200A · 25m (690V)