GWR ASE
New User
- Location
- South Carolina
- Occupation
- Electrical Engineer
Does anyone have any equations, tables, or graphs for de-rating wire/cable ampacity at high elevations(3500m, 3800m, & 4000m) where air is thin and has a lower cooling capacity. Even software programs like ETAP do not account for this. How do I determine the de-rating factor. Not a guess, but a published document I can provide with my engineering report to validate my derating factor. This is a 400V(380V), 50Hz system with motor loads ranging from 50HP-500HP
