30 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 30 A over 70 m (229.7 ft).
Copper Cable (≤3% Drop)10 mm²Drop: 7.78V (1.88%)
Aluminum Cable (≤3% Drop)16 mm²Drop: 8.02V (1.93%)
Voltage at Load407.2 VLine Loss: 404.5 W
Max Power & Breaker21.56 kW30A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 30A at 70m
| 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 | 51.89 V (12.5%) | 363.1 V | 85.6 V (20.63%) | 2696.4 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 31.14 V (7.5%) | 383.9 V | 51.36 V (12.38%) | 1617.8 W | Drop High |
| 4 mm² | 32 A | 25 A | 19.46 V (4.69%) | 395.5 V | 32.1 V (7.73%) | 1011.1 W | ~ ≤5% |
| 6 mm² | 41 A | 32 A | 12.97 V (3.13%) | 402.0 V | 21.4 V (5.16%) | 674.1 W | ~ ≤5% |
| 10 mm² | 57 A | 44 A | 7.78 V (1.88%) | 407.2 V | 12.84 V (3.09%) | 404.5 W | ✓ OK (≤3%) |
| 16 mm² | 76 A | 59 A | 4.86 V (1.17%) | 410.1 V | 8.02 V (1.93%) | 252.8 W | ✓ OK (≤3%) |
| 25 mm² | 101 A | 78 A | 3.11 V (0.75%) | 411.9 V | 5.14 V (1.24%) | 161.8 W | ✓ OK (≤3%) |
| 35 mm² | 125 A | 97 A | 2.22 V (0.54%) | 412.8 V | 3.67 V (0.88%) | 115.6 W | ✓ OK (≤3%) |
| 50 mm² | 151 A | 118 A | 1.56 V (0.38%) | 413.4 V | 2.57 V (0.62%) | 80.9 W | ✓ OK (≤3%) |
| 70 mm² | 192 A | 150 A | 1.11 V (0.27%) | 413.9 V | 1.83 V (0.44%) | 57.8 W | ✓ OK (≤3%) |
| 95 mm² | 232 A | 181 A | 0.82 V (0.2%) | 414.2 V | 1.35 V (0.33%) | 42.6 W | ✓ OK (≤3%) |
| 120 mm² | 269 A | 210 A | 0.65 V (0.16%) | 414.4 V | 1.07 V (0.26%) | 33.7 W | ✓ OK (≤3%) |
| 150 mm² | 309 A | 241 A | 0.52 V (0.13%) | 414.5 V | 0.86 V (0.21%) | 27.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.42 V (0.1%) | 414.6 V | 0.69 V (0.17%) | 21.9 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.32 V (0.08%) | 414.7 V | 0.53 V (0.13%) | 16.9 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.26 V (0.06%) | 414.7 V | 0.43 V (0.1%) | 13.5 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.19 V (0.05%) | 414.8 V | 0.32 V (0.08%) | 10.1 W | ✓ OK (≤3%) |
FAQ — 30 Amp Cable Size at 70 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 30A at 70 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 10 mm² copper cable for 30A over 70m at 415V (voltage drop: 7.78V or 1.88%).
What is the power capacity of 30A at 415V?
At unity power factor, 30A at 415V supports 21.56 kW with a standard 30A circuit breaker.
Related Lengths & Currents (415V)
30A · 5m (415V)30A · 10m (415V)30A · 15m (415V)30A · 20m (415V)30A · 25m (415V)30A · 30m (415V)30A · 35m (415V)30A · 40m (415V)30A · 45m (415V)30A · 50m (415V)30A · 60m (415V)10A · 70m (415V)16A · 70m (415V)20A · 70m (415V)25A · 70m (415V)32A · 70m (415V)40A · 70m (415V)50A · 70m (415V)63A · 70m (415V)80A · 70m (415V)100A · 70m (415V)125A · 70m (415V)160A · 70m (415V)200A · 70m (415V)