Sorry, I mean plenum rated wire. What I want to know is if I run wire from basement to attic do need to use it? I really don't want to because from what I've read the cost differential, for say Cat 5, is substantial if I'm using a lot (2 home runs per outlet). I don't plan on using returns if I don't have to. I understand if I do use returns I need plenum rated wire. But what if I open a large space between studs myself (not used as a return), but runs from basement to attic? I was wondering, if I ran conduit in that hole, does that make a difference.
Essentially, I want to run a lot of phone/coax to the rooms upstairs. I need to get it to the attic. I would prefer to not use returns and to not use plenum rated wire (cost). Is this possible?