800 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 800 A over 300 m (984.3 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 11.12V (1.61%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 36.68V (5.32%)
Voltage at Load678.9 VLine Loss: 15408.0 W
Max Power & Breaker956.09 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 300m
| 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 | 5930.54 V (859.5%) | 0.0 V | 9782.62 V (1417.77%) | 8217600.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 3558.33 V (515.7%) | 0.0 V | 5869.57 V (850.66%) | 4930560.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 2223.95 V (322.31%) | 0.0 V | 3668.48 V (531.66%) | 3081600.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 1482.64 V (214.87%) | 0.0 V | 2445.66 V (354.44%) | 2054400.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 889.58 V (128.92%) | 0.0 V | 1467.39 V (212.67%) | 1232640.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 555.99 V (80.58%) | 134.0 V | 917.12 V (132.92%) | 770400.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 355.83 V (51.57%) | 334.2 V | 586.96 V (85.07%) | 493056.0 W | Drop High |
| 35 mm² | 125 A | 97 A | 254.17 V (36.84%) | 435.8 V | 419.26 V (60.76%) | 352182.9 W | Drop High |
| 50 mm² | 151 A | 118 A | 177.92 V (25.78%) | 512.1 V | 293.48 V (42.53%) | 246528.0 W | Drop High |
| 70 mm² | 192 A | 150 A | 127.08 V (18.42%) | 562.9 V | 209.63 V (30.38%) | 176091.4 W | Drop High |
| 95 mm² | 232 A | 181 A | 93.64 V (13.57%) | 596.4 V | 154.46 V (22.39%) | 129751.6 W | Drop High |
| 120 mm² | 269 A | 210 A | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 102720.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 59.31 V (8.59%) | 630.7 V | 97.83 V (14.18%) | 82176.0 W | Drop High |
| 185 mm² | 353 A | 275 A | 48.09 V (6.97%) | 641.9 V | 79.32 V (11.5%) | 66629.2 W | Drop High |
| 240 mm² | 415 A | 324 A | 37.07 V (5.37%) | 652.9 V | 61.14 V (8.86%) | 51360.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 29.65 V (4.3%) | 660.3 V | 48.91 V (7.09%) | 41088.0 W | Drop High |
| 400 mm² | 570 A | 445 A | 22.24 V (3.22%) | 667.8 V | 36.68 V (5.32%) | 30816.0 W | Drop High |
FAQ — 800 Amp Cable Size at 300 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 800A at 300 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 800A over 300m at 690V (voltage drop: 11.12V or 1.61%).
What is the power capacity of 800A at 690V?
At unity power factor, 800A at 690V supports 956.09 kW with a standard 800A circuit breaker.
Related Lengths & Currents (690V)
800A · 5m (690V)800A · 10m (690V)800A · 15m (690V)800A · 20m (690V)800A · 25m (690V)800A · 30m (690V)800A · 35m (690V)800A · 40m (690V)800A · 45m (690V)800A · 50m (690V)800A · 60m (690V)800A · 70m (690V)10A · 300m (690V)16A · 300m (690V)20A · 300m (690V)25A · 300m (690V)32A · 300m (690V)40A · 300m (690V)50A · 300m (690V)63A · 300m (690V)80A · 300m (690V)100A · 300m (690V)125A · 300m (690V)160A · 300m (690V)200A · 300m (690V)