45 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 45 A over 90 m (295.3 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 15.01V (2.18%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 15.48V (2.24%)
Voltage at Load675.0 VLine Loss: 1170.0 W
Max Power & Breaker53.78 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A 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 | 100.08 V (14.5%) | 589.9 V | 165.08 V (23.92%) | 7800.3 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 60.05 V (8.7%) | 630.0 V | 99.05 V (14.35%) | 4680.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 37.53 V (5.44%) | 652.5 V | 61.91 V (8.97%) | 2925.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 25.02 V (3.63%) | 665.0 V | 41.27 V (5.98%) | 1950.1 W | Drop High |
| 10 mm² | 57 A | 44 A | 15.01 V (2.18%) | 675.0 V | 24.76 V (3.59%) | 1170.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 9.38 V (1.36%) | 680.6 V | 15.48 V (2.24%) | 731.3 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 6.0 V (0.87%) | 684.0 V | 9.9 V (1.44%) | 468.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 4.29 V (0.62%) | 685.7 V | 7.07 V (1.03%) | 334.3 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 3.0 V (0.44%) | 687.0 V | 4.95 V (0.72%) | 234.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 2.14 V (0.31%) | 687.9 V | 3.54 V (0.51%) | 167.1 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.58 V (0.23%) | 688.4 V | 2.61 V (0.38%) | 123.2 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.25 V (0.18%) | 688.7 V | 2.06 V (0.3%) | 97.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 1.0 V (0.15%) | 689.0 V | 1.65 V (0.24%) | 78.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.81 V (0.12%) | 689.2 V | 1.34 V (0.19%) | 63.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.63 V (0.09%) | 689.4 V | 1.03 V (0.15%) | 48.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.5 V (0.07%) | 689.5 V | 0.83 V (0.12%) | 39.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.38 V (0.05%) | 689.6 V | 0.62 V (0.09%) | 29.3 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 90 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 45A at 90 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 45A over 90m at 690V (voltage drop: 15.01V or 2.18%).
What is the power capacity of 45A at 690V?
At unity power factor, 45A at 690V supports 53.78 kW with a standard 45A circuit breaker.
Related Lengths & Currents (690V)
45A · 5m (690V)45A · 10m (690V)45A · 15m (690V)45A · 20m (690V)45A · 25m (690V)45A · 30m (690V)45A · 35m (690V)45A · 40m (690V)45A · 45m (690V)45A · 50m (690V)45A · 60m (690V)45A · 70m (690V)10A · 90m (690V)16A · 90m (690V)20A · 90m (690V)25A · 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)