boxes in brick

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jds1024 said:
is there anything in the nec that says you can or cannot use plastic boxes in brick
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I would say that there is nothing that says that you can't, unless the box specifically prohibits it.
 
The problem with article 110.3(B) is that the manufacture does not specifi whether this product can or can't
 
jds1024 said:
The problem with this article is that the manufacture does not specifi whether this product can or can't
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If they don't say you can't, then you can. The code is permissive like that. As far as that goes, it's somewhat normal to see plastic wall boxes mudded in the brick, particularly on residential projects.
 
Grab a full case of Carlon cheap-o blue boxes and read the label on it. It states something to this effect, about being rated for use in masonry. I prefer 1900 boxes with a sleeve of EMT, myself.
 
memyselfandI said:
I use a masonry box with a piece of ENT. (Smurftube). Yes I do ground it. The box I mean.
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For the benefit of us engineer types, can you explain what a masonary box is? How is it different from a regular box?
 
I call them mud boxes.Sure they are the same thing as refered to.A regular box has openings in the shell of the box.A mud/masonry box is available in different gangs and has no openings other than the ko`s for entry.

On brick exteriors I use a standard plastic box and leave it on the NM with a long whip.The brick masons set the box at the appropriate height and complete the job.On trim I strip and terminate the NM (residential) and go on.

Now I have been tagged for not making up the grounds on rough but just went back and made up the grounds and it passed.go figure........
 
Steve, here is a single gang masonry box.

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Roger
 
I prefer using T+B plastic boxes over carlon ones, but anyway, in brick I use T+B plastic, and instead of cement lately I have used expanding foam to secure the boxes. That has been working very well, have not had any come loose at all, whereas I have had some boxes where grouting to secure an old work box was not working out so good.
 
True masonry boxes have square corners rather than rounded ones. This makes it easier to have them match the finished surface without a big grout line.
 
Thanks for the picture Roger. That's ringing a bell. I may have asked the same question before:)

Steve
 
nonmetallic outlet boxes

nonmetallic outlet boxes

UL electrical equipment 2006, page 194, boxes will have a designation of "concrete tight". Metallic boxes as stated and shown above are concrete tight. If there is a nonmettalic box out there I've never seen one, but alwaya willing and ready to learn.
 
lowryder88h said:
UL electrical equipment 2006, page 194, boxes will have a designation of "concrete tight". Metallic boxes as stated and shown above are concrete tight. If there is a nonmettalic box out there I've never seen one, but alwaya willing and ready to learn.
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Is a box that is installed in brick required to be concrete tight?
 
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