I will be building a small 1200 sq house soon and plan to go with a gravel
Back filled slab. I will be doing the plumbing and much of the wiring myself.
If I plan carefully could I run some grey conduit to make the circuit runs shorter and save on wire and increase the ease of future repairs. If I use a big enough
Conduit could I run Romex thru it? For example use 1 1/2 inch to run the range
Wire or wire to water heater etc. if this is permissible what size would it take to
Just run a 12/2 with ground to get to other side of house and avoid going thru
Attic?
The other issue is water lines. I would like to use a wide sweep elbow and PVC
Pipe to have a conduit for flexible polyethylene water lines. Making them replaceable and easy to route using proper planning of where to place the
Conduits. Could I run schedule 40 PVC from meter and connect outside the slab
Perimeter to polyethylene which could be snaked thru conduit into house. As
An alternative can you run polyethylene from meter to house and eliminate
The PVC entirely?
If I plan carefully could I run some grey conduit to make the circuit runs shorter and save on wire and increase the ease of future repairs. If I use a big enough
Conduit could I run Romex thru it? For example use 1 1/2 inch to run the range
Wire or wire to water heater etc. if this is permissible what size would it take to
Just run a 12/2 with ground to get to other side of house and avoid going thru
Attic?
I believe you are allowed to run Romex in conduit with proper derating. Conventional wisdom from a brief Google search indicates that you will have a hell of a time pulling any significant length of Romex through conduit, since it is sleeved already (which creates high friction). Typically runs in conduit use multiple individual conductors as necessary.
I would try to use large conduit say 1 1/2 " to make it easier to run thru.
Maybe just a few conduits to get from box across slab. If one to one and a half
Inch conduit would be permissible for one 12/2 with ground wire I would willing
To use some just to avoid having all the wires in the attic.
I suggest posting your electrical questions in the Electrical forum, and the plumbing questions in the plumbing forum. You will get advice from experts if you do that.
For your water supply line sleeves, run the least expensive, thinnest poly pipe you can find in a roll. You'll automatically have the long sweep ells and save your money on that PVC and fittings so you can run your HVAC ducts PVC under the slab, forget about insulating, and have the most efficient duct system in the neighborhood.
I have the return in the attic and if I ever built again the return would be a chase and not in the attic.
Is your "gravel Back filled slab" considered to be a slab on grade ? If so, the conduit is considered to be a wet location, and NM-B (romex) cannot be used. You would have to use a UF cable or go with individual conductors of THWN (prefered).
I don't know why you are trying so hard to avoid the attic.
A little more wire in a much easier installation makes a lot more sense to me than the multiple complications that conduit in slab (or below) will cause for you.
You are right about the wiring and I am giving up on that idea. The water line advice on using the flexible black piping is a good one and is what I will do.
I have never heard of putting the HVAC ducting under a slab. How does that work and what material do you use? My slab will be above grade due to a slightly
Sloping contour. It will require a lot of stone back fill but will allow for easy additions of conduits and plumbing.
I have never heard of putting the HVAC ducting under a slab. How does that work and what material do you use? My slab will be above grade due to a slightly
The duct material is PVC and the boots are grouted in place. I'm sorry I don't have a single picture. Thirty years ago I was a young whipper snapper and working 70-8- hours in a very hot summer when the house was built and I didn't have time for pics and really didn't think of it. But I believe the largest duct was either 8" or possibly 10 inch and they all get trenched in and soil covered.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
DIY Home Improvement Forum
3.1M posts
319.5K members
Since 2003
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!