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nullqwerty 10-23-2011 11:36 AM

Quick Questions For Running Conduit In Walls
Hey folks,

I'm about to get some insulation blow into my exterior walls. In the future I hope to finish off my attic, so I want to run some conduit from the attic to my basement before I get the insulation done. My house has the framing style where I can just drop a line all the way from the attic to the basement (there's no blocking in between). The basement is the only place I have to drill a hole, which is to access the conduit. I want to run two for high voltage and one for low voltage. This is for Massachusetts

1) Seems like there's all sorts of types of conduit out there, but I'm not sure of the differences. I just want the easiest/quickest installation, while still having something up to code and up to snuff, so that in the future I don't say "Wish I would have gone with that other type...". So, do I want ENT, FMC EMT, Romex, Smurf...?
2) How do I attach it? Against the studs with a bracket and some screws?
3) Is only attaching it at the top sufficient?
4) Is there a standard for colors? Like Gray is for High Voltage and Blue is for Low Voltage?
5) Do I need to line it with grease? If so, how do you go about that?
6) What else do I need to know other than that I'm just snaking it through the wall?


nullqwerty 10-25-2011 12:30 PM

To simplify this post, what if we just focused on my first question. What type of conduit should I use? Thoughts?


Jim Port 10-25-2011 07:57 PM

I would use a conduit like PVC or EMT over ENT (smurf) and FMC. It will be easier to pull the conductors in.

You should be able to find straps to fit whatever type of conduit that you run.

Some ENT is only for low voltage. I believe that was the Carlon orange ENT.

You would use wire lube which is made specifically for use with wire and cables. You do not want to use petroleum based lubes.

The straighter the run the easier the pull will be.

nullqwerty 10-31-2011 01:56 PM

Thanks for the reply!

Gonna run it this weekend using either the PVC or the ENT. But, quick question. I got a buddy that's telling me this whole project is unnecessary. He says that even though I'm getting insulation blown in, if in 3 years I want to run new high voltage or low voltage set of lines in the wall, it won't be any harder even though there's insulation in the walls, and also says that running the lines won't disturb the insulation at all. Basically, he's saying there's no point in running this conduit right now. Is this true or false?


teamo 10-31-2011 05:32 PM

The blown in insulation is not impossible to get through. I would suggest running some pull strings if you are not going to run the conduit.

Jim Port 10-31-2011 05:39 PM

I would install the conduits instead of disturbing the thermal barrier. The conduit is a guaranteed path vs fishing and the possibility of a later headache.

nullqwerty 10-31-2011 07:41 PM

Ok cool. Thanks, I'll go for it.

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