45 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 45 A over 80 m (262.5 ft).
Copper Cable (≤3% Drop)16 mm²Drop: 8.34V (2.01%)
Aluminum Cable (≤3% Drop)25 mm²Drop: 8.8V (2.12%)
Voltage at Load406.7 VLine Loss: 650.0 W
Max Power & Breaker32.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 80m
| 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 | 88.96 V (21.44%) | 326.0 V | 146.74 V (35.36%) | 6933.6 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 53.37 V (12.86%) | 361.6 V | 88.04 V (21.22%) | 4160.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 33.36 V (8.04%) | 381.6 V | 55.03 V (13.26%) | 2600.1 W | Drop High |
| 6 mm² | 41 A | 32 A | 22.24 V (5.36%) | 392.8 V | 36.68 V (8.84%) | 1733.4 W | Drop High |
| 10 mm² | 57 A | 44 A | 13.34 V (3.22%) | 401.7 V | 22.01 V (5.3%) | 1040.0 W | ~ ≤5% |
| 16 mm² | 76 A | 59 A | 8.34 V (2.01%) | 406.7 V | 13.76 V (3.31%) | 650.0 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 5.34 V (1.29%) | 409.7 V | 8.8 V (2.12%) | 416.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 3.81 V (0.92%) | 411.2 V | 6.29 V (1.52%) | 297.2 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 2.67 V (0.64%) | 412.3 V | 4.4 V (1.06%) | 208.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.91 V (0.46%) | 413.1 V | 3.14 V (0.76%) | 148.6 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 1.4 V (0.34%) | 413.6 V | 2.32 V (0.56%) | 109.5 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 1.11 V (0.27%) | 413.9 V | 1.83 V (0.44%) | 86.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.89 V (0.21%) | 414.1 V | 1.47 V (0.35%) | 69.3 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.72 V (0.17%) | 414.3 V | 1.19 V (0.29%) | 56.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.56 V (0.13%) | 414.4 V | 0.92 V (0.22%) | 43.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.44 V (0.11%) | 414.6 V | 0.73 V (0.18%) | 34.7 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.33 V (0.08%) | 414.7 V | 0.55 V (0.13%) | 26.0 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 80 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 45A at 80 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 16 mm² copper cable for 45A over 80m at 415V (voltage drop: 8.34V or 2.01%).
What is the power capacity of 45A at 415V?
At unity power factor, 45A at 415V supports 32.35 kW with a standard 45A circuit breaker.
Related Lengths & Currents (415V)
45A · 5m (415V)45A · 10m (415V)45A · 15m (415V)45A · 20m (415V)45A · 25m (415V)45A · 30m (415V)45A · 35m (415V)45A · 40m (415V)45A · 45m (415V)45A · 50m (415V)45A · 60m (415V)45A · 70m (415V)10A · 80m (415V)16A · 80m (415V)20A · 80m (415V)25A · 80m (415V)32A · 80m (415V)40A · 80m (415V)50A · 80m (415V)63A · 80m (415V)80A · 80m (415V)100A · 80m (415V)125A · 80m (415V)160A · 80m (415V)200A · 80m (415V)