45 Amp Cable Size at 350 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 350 m (1148.3 ft).
Copper Cable (≤3% Drop)35 mm²Drop: 16.68V (2.42%)
Aluminum Cable (≤3% Drop)50 mm²Drop: 19.26V (2.79%)
Voltage at Load673.3 VLine Loss: 1300.0 W
Max Power & Breaker53.78 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 350m
| 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 | 389.19 V (56.4%) | 300.8 V | 641.98 V (93.04%) | 30334.5 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 233.52 V (33.84%) | 456.5 V | 385.19 V (55.82%) | 18200.7 W | Drop High |
| 4 mm² | 32 A | 25 A | 145.95 V (21.15%) | 544.1 V | 240.74 V (34.89%) | 11375.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 97.3 V (14.1%) | 592.7 V | 160.5 V (23.26%) | 7583.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 58.38 V (8.46%) | 631.6 V | 96.3 V (13.96%) | 4550.2 W | Drop High |
| 16 mm² | 76 A | 59 A | 36.49 V (5.29%) | 653.5 V | 60.19 V (8.72%) | 2843.9 W | Drop High |
| 25 mm² | 101 A | 78 A | 23.35 V (3.38%) | 666.6 V | 38.52 V (5.58%) | 1820.1 W | ~ ≤5% |
| 35 mm² | 125 A | 97 A | 16.68 V (2.42%) | 673.3 V | 27.51 V (3.99%) | 1300.0 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 11.68 V (1.69%) | 678.3 V | 19.26 V (2.79%) | 910.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 8.34 V (1.21%) | 681.7 V | 13.76 V (1.99%) | 650.0 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 6.15 V (0.89%) | 683.9 V | 10.14 V (1.47%) | 479.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 4.86 V (0.71%) | 685.1 V | 8.02 V (1.16%) | 379.2 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 3.89 V (0.56%) | 686.1 V | 6.42 V (0.93%) | 303.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 3.16 V (0.46%) | 686.8 V | 5.21 V (0.75%) | 246.0 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 2.43 V (0.35%) | 687.6 V | 4.01 V (0.58%) | 189.6 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.95 V (0.28%) | 688.1 V | 3.21 V (0.47%) | 151.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.46 V (0.21%) | 688.5 V | 2.41 V (0.35%) | 113.8 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 350 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 45A at 350 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 35 mm² copper cable for 45A over 350m at 690V (voltage drop: 16.68V or 2.42%).
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 · 350m (690V)16A · 350m (690V)20A · 350m (690V)25A · 350m (690V)32A · 350m (690V)40A · 350m (690V)50A · 350m (690V)63A · 350m (690V)80A · 350m (690V)100A · 350m (690V)125A · 350m (690V)160A · 350m (690V)200A · 350m (690V)