800 Amp Cable Size at 40 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 40 m (131.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 1.49V (0.21%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.89V (0.71%)
Voltage at Load688.5 VLine Loss: 2054.4 W
Max Power & Breaker956.09 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 40m
| 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 | 790.74 V (114.6%) | 0.0 V | 1304.35 V (189.04%) | 1095680.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 474.44 V (68.76%) | 215.6 V | 782.61 V (113.42%) | 657408.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 296.53 V (42.97%) | 393.5 V | 489.13 V (70.89%) | 410880.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 197.68 V (28.65%) | 492.3 V | 326.09 V (47.26%) | 273920.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 118.61 V (17.19%) | 571.4 V | 195.65 V (28.36%) | 164352.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 74.13 V (10.74%) | 615.9 V | 122.28 V (17.72%) | 102720.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 47.44 V (6.88%) | 642.6 V | 78.26 V (11.34%) | 65740.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 33.89 V (4.91%) | 656.1 V | 55.9 V (8.1%) | 46957.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 23.72 V (3.44%) | 666.3 V | 39.13 V (5.67%) | 32870.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 16.94 V (2.46%) | 673.1 V | 27.95 V (4.05%) | 23478.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 12.49 V (1.81%) | 677.5 V | 20.59 V (2.98%) | 17300.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 9.88 V (1.43%) | 680.1 V | 16.3 V (2.36%) | 13696.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 7.91 V (1.15%) | 682.1 V | 13.04 V (1.89%) | 10956.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.41 V (0.93%) | 683.6 V | 10.58 V (1.53%) | 8883.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 4.94 V (0.72%) | 685.1 V | 8.15 V (1.18%) | 6848.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 3.95 V (0.57%) | 686.0 V | 6.52 V (0.95%) | 5478.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.97 V (0.43%) | 687.0 V | 4.89 V (0.71%) | 4108.8 W | Drop High |
FAQ — 800 Amp Cable Size at 40 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 800A at 40 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 40m at 690V (voltage drop: 1.49V or 0.21%).
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 · 45m (690V)800A · 50m (690V)800A · 60m (690V)800A · 70m (690V)10A · 40m (690V)16A · 40m (690V)20A · 40m (690V)25A · 40m (690V)32A · 40m (690V)40A · 40m (690V)50A · 40m (690V)63A · 40m (690V)80A · 40m (690V)100A · 40m (690V)125A · 40m (690V)160A · 40m (690V)200A · 40m (690V)