shespuzzling
Member
- Location
- new york
Hi,
I'm struggling to understand why the effective Z of conductors, which is used to calculate voltage drop, changes with respect to the power factor. For a given current I, I don't understand why the wire resistance could possibly be affected by the PF.
Furthermore, I tried calculating the effective Z at 0.85 PF via the formula given in the footnotes (Z=Rcos(theta)+Xsin(theta)) and am not coming up with the same values as listed in the code! It doesn't appear to be a rounding change or anything.
Any help would be appreciated!
I'm struggling to understand why the effective Z of conductors, which is used to calculate voltage drop, changes with respect to the power factor. For a given current I, I don't understand why the wire resistance could possibly be affected by the PF.
Furthermore, I tried calculating the effective Z at 0.85 PF via the formula given in the footnotes (Z=Rcos(theta)+Xsin(theta)) and am not coming up with the same values as listed in the code! It doesn't appear to be a rounding change or anything.
Any help would be appreciated!