I am trying to figure something out and any help is appreciated. I am trying to find the impedance im mohms for a perticular length of cable. It is for a hospital installation where the vendor equipment is restricting the maximum incoming line impedance as (m ohm) 180. I used table 9 to find the ohms to netural per 1000' and got it down to ohms per foot now how do I get it to m ohm's?