300 Amp Cable Size at 200 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 200 m (656.2 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 14.83V (2.15%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 15.29V (2.22%)
Voltage at Load675.2 VLine Loss: 7704.0 W
Max Power & Breaker358.53 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 200m
| 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 | 1482.64 V (214.87%) | 0.0 V | 2445.66 V (354.44%) | 770400.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 889.58 V (128.92%) | 0.0 V | 1467.39 V (212.67%) | 462240.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 555.99 V (80.58%) | 134.0 V | 917.12 V (132.92%) | 288900.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 370.66 V (53.72%) | 319.3 V | 611.41 V (88.61%) | 192600.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 222.4 V (32.23%) | 467.6 V | 366.85 V (53.17%) | 115560.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 139.0 V (20.14%) | 551.0 V | 229.28 V (33.23%) | 72225.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 88.96 V (12.89%) | 601.0 V | 146.74 V (21.27%) | 46224.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 63.54 V (9.21%) | 626.5 V | 104.81 V (15.19%) | 33017.1 W | Drop High |
| 50 mm² | 151 A | 118 A | 44.48 V (6.45%) | 645.5 V | 73.37 V (10.63%) | 23112.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 31.77 V (4.6%) | 658.2 V | 52.41 V (7.6%) | 16508.6 W | Drop High |
| 95 mm² | 232 A | 181 A | 23.41 V (3.39%) | 666.6 V | 38.62 V (5.6%) | 12164.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 18.53 V (2.69%) | 671.5 V | 30.57 V (4.43%) | 9630.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 14.83 V (2.15%) | 675.2 V | 24.46 V (3.54%) | 7704.0 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 12.02 V (1.74%) | 678.0 V | 19.83 V (2.87%) | 6246.5 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 9.27 V (1.34%) | 680.7 V | 15.29 V (2.22%) | 4815.0 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 7.41 V (1.07%) | 682.6 V | 12.23 V (1.77%) | 3852.0 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 5.56 V (0.81%) | 684.4 V | 9.17 V (1.33%) | 2889.0 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 200 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 300A at 200 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 200m at 690V (voltage drop: 14.83V or 2.15%).
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 · 200m (690V)16A · 200m (690V)20A · 200m (690V)25A · 200m (690V)32A · 200m (690V)40A · 200m (690V)50A · 200m (690V)63A · 200m (690V)80A · 200m (690V)100A · 200m (690V)125A · 200m (690V)160A · 200m (690V)200A · 200m (690V)