dale, you mentioned a old house so let me ask you . have you ever come across what I was told are fire stops which is just usually a rough cut two by four between the uprights in a outer wall? the first old house we had was that way but oddly only on the North and w est sides.. now my other question. some cities do not allow the use of romex wire so there must be some sort of the old style b x cable for sale right? does the bx style wire incased in a cable . have different sizes like 12,14,16 and so on? Lee
On Mon, Sep 21, 2009 at 10:46:52PM -0400, Dale Leavens wrote: > Hi Dan, > > There doesn't seem to be much information about wiring chases which I find > amazing since they are not uncommon any more. I did read one article which > mentioned only fire blocking which is amusing really given that you have a > balloon style construction building as is mine with all those open runs. > > Getting good insulation into that sort of construction should be relatively > easy, just block the bottom and blow it through from above, the main > challenges then would be to get the voids under and along side windows. > > I discovered in this old house that some of those had been missed because the > installers didn't seem to understand balloon style construction. There were > windows where the bottom and top frame members run through between studs and > have one or both verticals between the horizontals thus forming more vertical > and closed compartments than you would expect in frame construction. Those > were missed. > > I have seen chases deliberately built in on some of those "This Old House" > programmes but never really noticed or understood how or what they did. > > I don't understand why there would be a bigger heat issue pulling three 14-2 > cables through an inch tube than stapling them over each other then > blanketing them in insulation as is often found in ceilings and walls though. > > > ----- Original Message ----- > From: Dan Rossi > To: Blind Handyman List > Sent: Thursday, September 17, 2009 1:45 PM > Subject: [BlindHandyMan] insulation and wiring. > > > So I've been asking around on various web sites and various people about > putting a wire chase in my wall before having cellulose blown in. > Apparently, it is not code to pull Romex through any kind of conduit, > except in a few limited cases. It has to do with heat loading of the > wires. Individual, single conductors, are rated to 75 degrees C, but > Romex or multiconductor wires are only rated to 60 degrees C. So it seems > that I will have to run the wire chase, then pull a bunch of single > conductor wires through which I bet makes for some interesting times > making sure that you have the right set of wires connected to what you > expect to have them connected to. > > -- > Blue skies. > Dan Rossi > Carnegie Mellon University. > E-Mail: [email protected] > Tel: (412) 268-9081 > > > > > [Non-text portions of this message have been removed] > -- When you have an efficient government, you have a dictatorship. -- Harry Truman .
