80 Amp Cable Size at 40 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 80 A over 40 m (131.2 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 4.74V (0.69%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 5.59V (0.81%)
Voltage at Load685.3 VLine Loss: 657.4 W
Max Power & Breaker95.61 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A at 40m
| 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 | 79.07 V (11.46%) | 610.9 V | 130.43 V (18.9%) | 10956.8 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 47.44 V (6.88%) | 642.6 V | 78.26 V (11.34%) | 6574.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 4108.8 W | Drop High |
| 6 mm² | 41 A | 32 A | 19.77 V (2.86%) | 670.2 V | 32.61 V (4.73%) | 2739.2 W | Drop High |
| 10 mm² | 57 A | 44 A | 11.86 V (1.72%) | 678.1 V | 19.57 V (2.84%) | 1643.5 W | Drop High |
| 16 mm² | 76 A | 59 A | 7.41 V (1.07%) | 682.6 V | 12.23 V (1.77%) | 1027.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 4.74 V (0.69%) | 685.3 V | 7.83 V (1.13%) | 657.4 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 3.39 V (0.49%) | 686.6 V | 5.59 V (0.81%) | 469.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 2.37 V (0.34%) | 687.6 V | 3.91 V (0.57%) | 328.7 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.69 V (0.25%) | 688.3 V | 2.8 V (0.41%) | 234.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.25 V (0.18%) | 688.8 V | 2.06 V (0.3%) | 173.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.99 V (0.14%) | 689.0 V | 1.63 V (0.24%) | 137.0 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.79 V (0.11%) | 689.2 V | 1.3 V (0.19%) | 109.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.64 V (0.09%) | 689.4 V | 1.06 V (0.15%) | 88.8 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.49 V (0.07%) | 689.5 V | 0.82 V (0.12%) | 68.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.4 V (0.06%) | 689.6 V | 0.65 V (0.09%) | 54.8 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.3 V (0.04%) | 689.7 V | 0.49 V (0.07%) | 41.1 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 40 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 80A at 40 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 25 mm² copper cable for 80A over 40m at 690V (voltage drop: 4.74V or 0.69%).
What is the power capacity of 80A at 690V?
At unity power factor, 80A at 690V supports 95.61 kW with a standard 80A circuit breaker.
Related Lengths & Currents (690V)
80A · 5m (690V)80A · 10m (690V)80A · 15m (690V)80A · 20m (690V)80A · 25m (690V)80A · 30m (690V)80A · 35m (690V)80A · 45m (690V)80A · 50m (690V)80A · 60m (690V)80A · 70m (690V)10A · 40m (690V)16A · 40m (690V)20A · 40m (690V)25A · 40m (690V)32A · 40m (690V)40A · 40m (690V)50A · 40m (690V)63A · 40m (690V)100A · 40m (690V)125A · 40m (690V)160A · 40m (690V)200A · 40m (690V)