I'm wondering what everyone's technique to install floor outlet boxes for wood floors on sleepers?

I've done lots of installations without sleepers, and I would like to hear everyone's opinions.

thanks,
Stan

On sleepers? Is the floor being raised for this?

What is under the sleepers? Concrete, steel or wood? How much clearance do you have?

Its in a concrete foundation. The wood floor sits on top of 2x4's in a recess in the foundation. There will be 3.5 inches of clearance between the concrete and the bottom of the finished floor.

I was thinking about installing the floor boxes like I normally would (Just placing them in the concrete of the foundation, but i'm not sure if the boxes will be tall enough to reach the finished floor.

My other idea was to place conduit where it will be accessible in the recess once the foundation is poured, then pipe over to the boxes which I would mount directly on top of the concrete.

I would really like to hear everyone's opinion on this.

Stan

I would mount the boxes such that they will be flush with the finish floor. They do make a type of floor box for mounting in wood. I would fasten them to the sides of the sleepers, and pipe between, rather than have them under ths concrete.
Not to say there aren't better ideas out there.

I'm not sure I completely understand your set-up here, but how about hanging a 1900 bracket box off the sleepers with a 3/4" ring?

The only problem with all the ideas so far is that you have to be certain of the floor thickness (sub floor+finish floor) or you are screwed.

The better way to do this is to just cut a box in after the floor is finished. A buddy of mine uses boxes and covers from a company that I can't remember (gotta be one of the major mfgs). They have a special hole saw for recessing the cover into the wood floor. Works perfectly.

-Hal

the shop i work for specializes in log homes, everything is wood and most of it is finished and varnished we use 2 different types of floor recept in the application one is a carlon box and galv steel bracket. during rough in the wire is left coiled up and strapped to a sleeper or sub floor and the builders just drill a little hole and leave the wire stubbed up. we return on the finish and cut in the hole, mount the bracket/box adjust it to meet finished floor and install recept and cover. whole thing comes as a kit costs about 20 bucks at wholesale house ... i thingk the orange box store even has them. there are several from hubbell that work well also.

I acn never remember who makes em... Steel City I think. (TB?)

Fully adjustable round floor rated outlet box. 2 1/2" high extra wide box, with an adjustable brass ring that comes up to the finished floor. Then a heavy brass cover. It's one of the few types we can use here.

Anyway, I usually put them in concrete, but it sound like you may be able to put one between the sub, and finish floor?

I found 'em! Warning these things are not cheap!
http://elec-cat.tnb.com/tnbcat/tnbcat/SCFB_home_page_dsp.build_catalog_home_page

Go to "floor boxes" - "Stamped Steel Floor Box Line for Use in Wood Floors"

There is a picture of excatly what you want to do! ( I think? )

sbw010,- Just get some 1 gang masonary boxes and space them off the concrete enough so they are just below the finnished floor.
Or you can also use a deep 4" sq.deep box and the correct size plaster ring.

zapped208,

Stop. Receptacle boxes in the floor gotta be approved for use as floor boxes. Check article 314.27(C). You cannot use regular wall boxes.

I think I'll do something like e57's picture shows (thanks e57). I'll just strap a pvc 90 to the concrete form where it will end up in the "Sleeper Recess" from there I will take the earlier suggestions, and pipe over to where i'm going to mount the boxes, and fasten some type of floor box directly to the sleeper.

I'll have to do some research on what kind of floor box will be best for this situation.

Thanks to everyone for their suggestions
Stan

Not just the box to be rate, but plate too.

It must be able to withstand a 400 lb person standing on one high heel shoe!

Or something to that effect. No there are specific box and plate ratings out there.... Some for in use too!

Just saw it at the supply house this morning.... a floor recep from P&S (pass & seymour) Brass plate, single recep & STANDARD 3 1/2 " sw box included. FWIW.

P&S makes a floor receptacle that will fit on a standard box. Use one of the adjustable single gang side mount boxes. or a new smart box would work after the fact.

Phil