300 Amp Cable Size at 100 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 100 m (328.1 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 7.41V (1.07%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 7.64V (1.11%)
Voltage at Load682.6 VLine Loss: 3852.0 W
Max Power & Breaker358.53 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 100m
| 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 | 741.32 V (107.44%) | 0.0 V | 1222.83 V (177.22%) | 385200.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 444.79 V (64.46%) | 245.2 V | 733.7 V (106.33%) | 231120.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 277.99 V (40.29%) | 412.0 V | 458.56 V (66.46%) | 144450.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 185.33 V (26.86%) | 504.7 V | 305.71 V (44.31%) | 96300.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 111.2 V (16.12%) | 578.8 V | 183.42 V (26.58%) | 57780.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 69.5 V (10.07%) | 620.5 V | 114.64 V (16.61%) | 36112.5 W | Drop High |
| 25 mm² | 101 A | 78 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 23112.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 31.77 V (4.6%) | 658.2 V | 52.41 V (7.6%) | 16508.6 W | Drop High |
| 50 mm² | 151 A | 118 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 11556.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 15.89 V (2.3%) | 674.1 V | 26.2 V (3.8%) | 8254.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 11.71 V (1.7%) | 678.3 V | 19.31 V (2.8%) | 6082.1 W | Drop High |
| 120 mm² | 269 A | 210 A | 9.27 V (1.34%) | 680.7 V | 15.29 V (2.22%) | 4815.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 7.41 V (1.07%) | 682.6 V | 12.23 V (1.77%) | 3852.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 6.01 V (0.87%) | 684.0 V | 9.91 V (1.44%) | 3123.2 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 4.63 V (0.67%) | 685.4 V | 7.64 V (1.11%) | 2407.5 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 3.71 V (0.54%) | 686.3 V | 6.11 V (0.89%) | 1926.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 2.78 V (0.4%) | 687.2 V | 4.59 V (0.66%) | 1444.5 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 100 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 300A at 100 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 100m at 690V (voltage drop: 7.41V or 1.07%).
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 · 5m (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 · 100m (690V)16A · 100m (690V)20A · 100m (690V)25A · 100m (690V)32A · 100m (690V)40A · 100m (690V)50A · 100m (690V)63A · 100m (690V)80A · 100m (690V)100A · 100m (690V)125A · 100m (690V)160A · 100m (690V)200A · 100m (690V)