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

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brantmacga

brantmacga

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Restaurant remodel.... They are removing a wall that has the lighting control panel & panelboard. Most conduits are through the slab and would like to set a box in the floor and route to another wall. But I'm not sure if that exists. It would need to have a stainless or brass cover w/ a gasket. Its a concrete slab with tile floor.
 
brantmacga said:
Restaurant remodel.... They are removing a wall that has the lighting control panel & panelboard. Most conduits are through the slab and would like to set a box in the floor and route to another wall. But I'm not sure if that exists. It would need to have a stainless or brass cover w/ a gasket. Its a concrete slab with tile floor.
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I was looking for the same box for the same application 3 years ago and I came up empty
 
yeh not finding anything.... I've been looking all night.

They're going to poop a brick tomorrow when I send them the change-order price to move this panel. The wall demo was in the plans all along but the lighting panels were shown to be in the back of the store, not the middle of the kitchen.
 
LarryFine said:
How about a Raco 5511?
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Thanks Larry... I was hoping for something like a 12x12 or so. There are (3)x 3/4", (2)x 1/2", (1)x 1-1/2", and a 2" conduit w/ the feeder. I planned to re-route the feeder overhead anyway and use a j-box in the floor for the lighting circuits; these are site lights, road signs, etc... I haven't ran the cross sectional area calcs yet to determine the exact box size.

If I could find a big enough box for the feeder that would save them several thousand.
 
I've looked at all the cast iron floorboxes from Hubbell & Legrand; I don't think this is going to work. And I'm not certain you can keep the water out when they mop the floor every night.

I've done this before where we had to find the conduits outside of the building, set a handhole, then turn them up an exterior wall and come in over the ceiling. That's likely the only practical thing to do here unless the GC is willing to give us time to do extensive floor cutting and move them to the nearest interior wall they cross. Thanks for the help in looking.
 
Also, was wondering if an exterior box (like a quazite) exists with a gasketed, load bearing cover and would work for your application.

Cheers, Wayne
 

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Electrical Junction Box In Ground Installation

The in-ground installation for CANTEX PVC junction boxes is also simple, but always be sure to follow all national and regional electrical codes. Article 314-29 of the National Electrical Code states that listed electrical junction boxes may be buried without excavating parts of buildings...
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wwhitney said:
Random item that sounds right but I know nothing about it or its availability or if it's actually suitable or properly listed:

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Cheers, Wayne
Click to expand...

This looks promising. I’ll look through the specs on this one tomorrow. As for a quazite type box, I’m not sure I can use an open bottom over a vapor barrier. I’m not completely familiar with the building codes on that though.


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I have no idea on price but Rittal makes some stainless steel enclosures with gaskets that are rated NEMA 4x not infloor, but it could work.

www.rittal.com

Terminal boxes KL Stainless steel

Terminal boxes, stainless steel 1.4301 (AISI 304), Protection category IP 66.
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If it's a decent restaurant they're going to want to be able to clean and you're going to have a hard time keeping something like that clean because it's going to collect dirt all the way around the rim. Best bet might be just to abandon the existing conduit and run new.

It might even be possible to put a crawl space under the floor and put the box there.
 
What about taking the cover from that raco box Larry mentioned, and retrofitting/fabricating it over a larger pull box? perhaps that is a little mongrel but sometimes in the field you do what you got to do, if you think the inspector won't mind.
 
brantmacga said:
As for a quazite type box, I’m not sure I can use an open bottom over a vapor barrier. I’m not completely familiar with the building codes on that though.
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I think quazite type boxes are available with solid bottoms.

Another possibility would be to separate the gasketed floor opening function from the electrical box function. Below FFE you could have a regular PVC box like Larry suggested. It would be mounted inside a larger void with a gasketed steel lid. E.g. a sump basin with a solid lid, such as this:


Cheers, Wayne
 
brantmacga said:
yeh not finding anything.... I've been looking all night.

They're going to poop a brick tomorrow when I send them the change-order price to move this panel. The wall demo was in the plans all along but the lighting panels were shown to be in the back of the store, not the middle of the kitchen.
Click to expand...
How close are the existing conduit stub ups to the middle of the kitchen floor? If the kitchen is large enough perhaps a small island could be installed that would accommodate a suitable junction box. But that would take some time too.
 
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