45 Amp Cable Size at 30 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 30 m (98.4 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 5.0V (1.21%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 5.16V (1.24%)
Voltage at Load410.0 VLine Loss: 390.0 W
Max Power & Breaker32.35 kW45A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 45A at 30m
| 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 | 33.36 V (8.04%) | 381.6 V | 55.03 V (13.26%) | 2600.1 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 20.02 V (4.82%) | 395.0 V | 33.02 V (7.96%) | 1560.1 W | Drop High |
| 4 mm² | 32 A | 25 A | 12.51 V (3.01%) | 402.5 V | 20.64 V (4.97%) | 975.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 8.34 V (2.01%) | 406.7 V | 13.76 V (3.31%) | 650.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.0 V (1.21%) | 410.0 V | 8.25 V (1.99%) | 390.0 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 3.13 V (0.75%) | 411.9 V | 5.16 V (1.24%) | 243.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 2.0 V (0.48%) | 413.0 V | 3.3 V (0.8%) | 156.0 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 1.43 V (0.34%) | 413.6 V | 2.36 V (0.57%) | 111.4 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.0 V (0.24%) | 414.0 V | 1.65 V (0.4%) | 78.0 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 0.71 V (0.17%) | 414.3 V | 1.18 V (0.28%) | 55.7 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.53 V (0.13%) | 414.5 V | 0.87 V (0.21%) | 41.1 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.42 V (0.1%) | 414.6 V | 0.69 V (0.17%) | 32.5 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.33 V (0.08%) | 414.7 V | 0.55 V (0.13%) | 26.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.27 V (0.07%) | 414.7 V | 0.45 V (0.11%) | 21.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.21 V (0.05%) | 414.8 V | 0.34 V (0.08%) | 16.3 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.17 V (0.04%) | 414.8 V | 0.28 V (0.07%) | 13.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.13 V (0.03%) | 414.9 V | 0.21 V (0.05%) | 9.8 W | ✓ OK (≤3%) |
FAQ — 45 Amp Cable Size at 30 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 45A at 30 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 45A over 30m at 415V (voltage drop: 5.0V or 1.21%).
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 · 35m (415V)45A · 40m (415V)45A · 45m (415V)45A · 50m (415V)45A · 60m (415V)45A · 70m (415V)10A · 30m (415V)16A · 30m (415V)20A · 30m (415V)25A · 30m (415V)32A · 30m (415V)40A · 30m (415V)50A · 30m (415V)63A · 30m (415V)80A · 30m (415V)100A · 30m (415V)125A · 30m (415V)160A · 30m (415V)200A · 30m (415V)