I just check back to get Tripps info and though I add a few more notes.
As I stated prior, regardless of the VD formulae you're using, the fact that you all are using VD in conductor sizing gains my respect and attention. I would like to note that I forgot to mention probably the largest contributor to VD variation is ambient temperature. The only problem I have with 2KID as a bases of VD is that it doesn't take temperature into account. Yesterday I had a conversation with a contractor who went stricky by 310.16 and wondered why Volts upsized a conductor. I point out to him the roll that temperature played in VD and that the NEC does account for it with the temperature Correction Factors located just below the 310.16 table, something that he had never noticed or done prior.
