bphgravity
Senior Member
- Location
- Florida
The unbalanced 3-phase neutral on a 480/277 volt, 4 wire calculation is quite intimidating and requires alot of work to complete. Everytime I have made this calculation ,the result is always nearly close to just simply determining the greatest unbalanced load between any two phases. It is so close that it never requires an adjustment to conductor size. Maybe not for the classroom or an exam, but in the field, do you think that the second method is acceptable?