Michael Brown
SAWHORSE
We have a multi-story apartment building in Charlotte, NC where we have 20 mini-splits serving various areas. We pulled a 14-4 TC-ER cable as the control wire for these units, taping them along the lineset as we do any other control wire and we have installed this type of wire for years in this area. The new electrical inspector wants an MC cable, not the wire we installed. We haven't been able to get an explanation as to why the cable we installed is incorrect. 2 of the four conductors will carry 208v with a third carrying a DC control signal. 725.24 seems to support the way we have this wire installed. We're not necessarily looking to argue with the inspector, we just want to understand the requirement and the inspector has not been forthcoming. Can anyone offer any insight?