Has anyone here been asked to supply Ploss of a voice evac circuit. Its something new I am being asked to provide and the AHJ gave me a formula that I had to go to find a forum full of people smarter than me to even understand it. I managed to get it in a spreadsheet based on their help, but they tell me my calculations are still wrong. They simply corrected them but need to get this right obviously and they will not provide any assistance on explaining it.
The 2nd part is they evidently only allow .5V loss and i had to change alot to make that happen and still didnt quite figure it out. I have 12W on 1 circuit that is less than 175 feet long on 14 gauge wire and it fails the .5 loss rule. Seems like something is very wrong. At this point i would need 2 circuits for every 1 in the building to keep withing limits