300 Amp Cable Size at 10 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 10 m (32.8 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 0.74V (0.18%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 0.76V (0.18%)
Voltage at Load414.3 VLine Loss: 385.2 W
Max Power & Breaker215.64 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 10m
| 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 | 74.13 V (17.86%) | 340.9 V | 122.28 V (29.47%) | 38520.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 44.48 V (10.72%) | 370.5 V | 73.37 V (17.68%) | 23112.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 27.8 V (6.7%) | 387.2 V | 45.86 V (11.05%) | 14445.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 18.53 V (4.47%) | 396.5 V | 30.57 V (7.37%) | 9630.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 11.12 V (2.68%) | 403.9 V | 18.34 V (4.42%) | 5778.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 6.95 V (1.67%) | 408.1 V | 11.46 V (2.76%) | 3611.2 W | Drop High |
| 25 mm² | 101 A | 78 A | 4.45 V (1.07%) | 410.6 V | 7.34 V (1.77%) | 2311.2 W | Drop High |
| 35 mm² | 125 A | 97 A | 3.18 V (0.77%) | 411.8 V | 5.24 V (1.26%) | 1650.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 2.22 V (0.54%) | 412.8 V | 3.67 V (0.88%) | 1155.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 1.59 V (0.38%) | 413.4 V | 2.62 V (0.63%) | 825.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 1.17 V (0.28%) | 413.8 V | 1.93 V (0.47%) | 608.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.93 V (0.22%) | 414.1 V | 1.53 V (0.37%) | 481.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 0.74 V (0.18%) | 414.3 V | 1.22 V (0.29%) | 385.2 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.6 V (0.14%) | 414.4 V | 0.99 V (0.24%) | 312.3 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.46 V (0.11%) | 414.5 V | 0.76 V (0.18%) | 240.8 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.37 V (0.09%) | 414.6 V | 0.61 V (0.15%) | 192.6 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.28 V (0.07%) | 414.7 V | 0.46 V (0.11%) | 144.4 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 10 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 300A at 10 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 300A over 10m at 415V (voltage drop: 0.74V or 0.18%).
What is the power capacity of 300A at 415V?
At unity power factor, 300A at 415V supports 215.64 kW with a standard 300A circuit breaker.
Related Lengths & Currents (415V)
300A · 5m (415V)300A · 15m (415V)300A · 20m (415V)300A · 25m (415V)300A · 30m (415V)300A · 35m (415V)300A · 40m (415V)300A · 45m (415V)300A · 50m (415V)300A · 60m (415V)300A · 70m (415V)10A · 10m (415V)16A · 10m (415V)20A · 10m (415V)25A · 10m (415V)32A · 10m (415V)40A · 10m (415V)50A · 10m (415V)63A · 10m (415V)80A · 10m (415V)100A · 10m (415V)125A · 10m (415V)160A · 10m (415V)200A · 10m (415V)