300 Amp Cable Size at 5 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 5 m (16.4 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 0.37V (0.05%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 0.38V (0.06%)
Voltage at Load689.6 VLine Loss: 192.6 W
Max Power & Breaker358.53 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 5m
| 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 | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 19260.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 11556.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 13.9 V (2.01%) | 676.1 V | 22.93 V (3.32%) | 7222.5 W | Drop High |
| 6 mm² | 41 A | 32 A | 9.27 V (1.34%) | 680.7 V | 15.29 V (2.22%) | 4815.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 5.56 V (0.81%) | 684.4 V | 9.17 V (1.33%) | 2889.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 3.47 V (0.5%) | 686.5 V | 5.73 V (0.83%) | 1805.6 W | Drop High |
| 25 mm² | 101 A | 78 A | 2.22 V (0.32%) | 687.8 V | 3.67 V (0.53%) | 1155.6 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.59 V (0.23%) | 688.4 V | 2.62 V (0.38%) | 825.4 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.11 V (0.16%) | 688.9 V | 1.83 V (0.27%) | 577.8 W | Drop High |
| 70 mm² | 192 A | 150 A | 0.79 V (0.12%) | 689.2 V | 1.31 V (0.19%) | 412.7 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.59 V (0.08%) | 689.4 V | 0.97 V (0.14%) | 304.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.46 V (0.07%) | 689.5 V | 0.76 V (0.11%) | 240.8 W | Drop High |
| 150 mm² | 309 A | 241 A | 0.37 V (0.05%) | 689.6 V | 0.61 V (0.09%) | 192.6 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.3 V (0.04%) | 689.7 V | 0.5 V (0.07%) | 156.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.23 V (0.03%) | 689.8 V | 0.38 V (0.06%) | 120.4 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.19 V (0.03%) | 689.8 V | 0.31 V (0.04%) | 96.3 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.14 V (0.02%) | 689.9 V | 0.23 V (0.03%) | 72.2 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 5 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 300A at 5 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 300A over 5m at 690V (voltage drop: 0.37V or 0.05%).
What is the power capacity of 300A at 690V?
At unity power factor, 300A at 690V supports 358.53 kW with a standard 300A circuit breaker.
Related Lengths & Currents (690V)
300A · 10m (690V)300A · 15m (690V)300A · 20m (690V)300A · 25m (690V)300A · 30m (690V)300A · 35m (690V)300A · 40m (690V)300A · 45m (690V)300A · 50m (690V)300A · 60m (690V)300A · 70m (690V)10A · 5m (690V)16A · 5m (690V)20A · 5m (690V)25A · 5m (690V)32A · 5m (690V)40A · 5m (690V)50A · 5m (690V)63A · 5m (690V)80A · 5m (690V)100A · 5m (690V)125A · 5m (690V)160A · 5m (690V)200A · 5m (690V)