I would like to see the constants he used for the formula.
5% of 120 is less than 5% of 124.
did he use nominal or delivered voltage?
I understand NEC says 120 nominal, but they aren’t enforcing NEC. It’s some other code. Does that code specify nominal will be used for calculations?
He used NEC the article 220 'calculated load', and the nominal voltages are from 220.5.
I will admit I have not done a voltage drop calculation in like 30 years and am fuzzy on the other variables.
There are some great old threads on here on VD.
My apprentice has a app on her phone that does VD calcs, its sponsored by one of the major wire manufacturers.
That doesn’t work. Ask 3 electricians for an article 220 load and you will get 3 answers.
The answer that this AHJ accepts as correct is then used for his voltage drop calc LOL.
If the intention of the state is to enforce these calculations by using an app then they should formally adopt a specific app so everyone is on the same page.
I should have been more clear, he said it does not have to be on an app. I was saying he uses an app to do it. He started showing me the app and I tuned out as I am pretty rusty on that stuff, used to engineered jobs.
My voltage drop app is my gut instinct, and I honestly felt the run was a little long so I had no fight in me for it.