Anyone know of an in-floor junction box? Located in kitchen.

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How many conduits of what sizes and fill?

I would look at every way to not have to do this, barring that here's what I would do:
Consult structural if applicable, confirm not a PT slab, get xray, then cut a clean square hole in the slab around the conduits. Augur a big hole a few feet deep in the bottom and fill with drainage gravel. Using stainless fasteners, bolt stainless angle iron into the sides of the concrete 1/4" below the surface of the slab. Get a cover plate the size of your cutout fabbed from 1/4" plate stainless with countersunk holes around its perimeter. Set the plate in the hole and transfer mark your angle iron, drill and tap the angle iron for the mounting screws that hold the cover down. Install regular junction boxes in your new vault.
 
Another option similar to what Todd0x1 has mentioned would be to use a "floor door" such as the one at the link below to provide access to regular junction boxes. The company has many different types of access doors depending on what you want.

Acudor Access Doors - Floor Doors - Non-Hinged - FT-8080-1

FT-8080-1: Non Hinged Panel Recessed 1" for Ceramic Tile/Concrete. Designed for interior and exterior applications. Blend with surrounding floor material
www.acudor.com www.acudor.com
 
synchro said:
Another option similar to what Todd0x1 has mentioned would be to use a "floor door" such as the one at the link below to provide access to regular junction boxes. The company has many different types of access doors depending on what you want.

Acudor Access Doors - Floor Doors - Non-Hinged - FT-8080-1

FT-8080-1: Non Hinged Panel Recessed 1" for Ceramic Tile/Concrete. Designed for interior and exterior applications. Blend with surrounding floor material
www.acudor.com www.acudor.com
Click to expand...

Those look good. Alot easier than what I proposed. Mine gets you completely flush with the existing floor though.
 
Todd0x1 said:
Those look good. A lot easier than what I proposed. Mine gets you completely flush with the existing floor though.
Click to expand...
It might be possible to cut away the tile under the flange of the floor door so that it rests directly on the concrete, allowing the door to be nearly flush with the tile surface.
 
synchro said:
Another option similar to what Todd0x1 has mentioned would be to use a "floor door" such as the one at the link below to provide access to regular junction boxes. The company has many different types of access doors depending on what you want.
That's what I had in mind on post #13.
You did a better job splaining it. (y) :)

Acudor Access Doors - Floor Doors - Non-Hinged - FT-8080-1

FT-8080-1: Non Hinged Panel Recessed 1" for Ceramic Tile/Concrete. Designed for interior and exterior applications. Blend with surrounding floor material
www.acudor.com www.acudor.com
Click to expand...
 
Lots of good ideas…. The problem with custom stuff is the clock is working against us. It’s not a PT slab, I know that for a fact.

Likely will come to a decision tomorrow on how to proceed.


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synchro said:
Another option similar to what Todd0x1 has mentioned would be to use a "floor door" such as the one at the link below to provide access to regular junction boxes. The company has many different types of access doors depending on what you want.

Acudor Access Doors - Floor Doors - Non-Hinged - FT-8080-1

FT-8080-1: Non Hinged Panel Recessed 1" for Ceramic Tile/Concrete. Designed for interior and exterior applications. Blend with surrounding floor material
www.acudor.com www.acudor.com
Click to expand...

This is a good option, had not considered this sort of install.

This isn’t the first time this sort of install has happened to me, and won’t be the last, I was looking for a quicker fix. Even if we don’t use this now I’m going to work on a solution to have in the future


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