80 Amp Cable Size at 120 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 120 m (393.7 ft).
Copper Cable (≤3% Drop)25 mm²Drop: 14.23V (2.06%)
Aluminum Cable (≤3% Drop)35 mm²Drop: 16.77V (2.43%)
Voltage at Load675.8 VLine Loss: 1972.2 W
Max Power & Breaker95.61 kW80A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 80A at 120m
| 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 | 237.22 V (34.38%) | 452.8 V | 391.3 V (56.71%) | 32870.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 142.33 V (20.63%) | 547.7 V | 234.78 V (34.03%) | 19722.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 88.96 V (12.89%) | 601.0 V | 146.74 V (21.27%) | 12326.4 W | Drop High |
| 6 mm² | 41 A | 32 A | 59.31 V (8.59%) | 630.7 V | 97.83 V (14.18%) | 8217.6 W | Drop High |
| 10 mm² | 57 A | 44 A | 35.58 V (5.16%) | 654.4 V | 58.7 V (8.51%) | 4930.6 W | Drop High |
| 16 mm² | 76 A | 59 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 3081.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 14.23 V (2.06%) | 675.8 V | 23.48 V (3.4%) | 1972.2 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 10.17 V (1.47%) | 679.8 V | 16.77 V (2.43%) | 1408.7 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 7.12 V (1.03%) | 682.9 V | 11.74 V (1.7%) | 986.1 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 5.08 V (0.74%) | 684.9 V | 8.39 V (1.22%) | 704.4 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 3.75 V (0.54%) | 686.3 V | 6.18 V (0.9%) | 519.0 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 2.97 V (0.43%) | 687.0 V | 4.89 V (0.71%) | 410.9 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 2.37 V (0.34%) | 687.6 V | 3.91 V (0.57%) | 328.7 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 1.92 V (0.28%) | 688.1 V | 3.17 V (0.46%) | 266.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 1.48 V (0.21%) | 688.5 V | 2.45 V (0.35%) | 205.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 1.19 V (0.17%) | 688.8 V | 1.96 V (0.28%) | 164.4 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.89 V (0.13%) | 689.1 V | 1.47 V (0.21%) | 123.3 W | ✓ OK (≤3%) |
FAQ — 80 Amp Cable Size at 120 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 80A at 120 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 120m at 690V (voltage drop: 14.23V or 2.06%).
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 · 40m (690V)80A · 45m (690V)80A · 50m (690V)80A · 60m (690V)80A · 70m (690V)10A · 120m (690V)16A · 120m (690V)20A · 120m (690V)25A · 120m (690V)32A · 120m (690V)40A · 120m (690V)50A · 120m (690V)63A · 120m (690V)100A · 120m (690V)125A · 120m (690V)160A · 120m (690V)200A · 120m (690V)