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So, the "boxes" aren't deep enough to penetrate the inner wall?But, how do you *access* the wire to do so? Possibly you can gain accessFrom the back of the box you can drill into the cavity,
INSIDE a box. But, now you have to get your "stub" wire out of the box
and into the "cavity" and, eventually, over to its destination.
>
Here, we can open walls with a "plunge saw" (drywall saw) -- to any level
of exposure deemed necessary. Then, slip a new piece of drywall (cut to
that size/shape) in its place and patch.
or carve out a trench in the surface of the inner wall deep enough to run the cable to the next box if the location is close. Plaster over the trench (and cable) when finished. I assume that is still allowed, it was many years ago that I did that.That would have to be armored, here, if within ~1.5" of the finished surface
In the house I had in England the inner wall was made of breeze block (cinder block) that was soft enough to gouge with a finger nail. Making a channel in it was very easy with a masonry chisel. It is more difficult if you have to do it in brick, stone or concrete.We have different densities of "block walls", here. For example, the block
Some houses use pre-cast concrete lintels over windows and doors. The concrete is those can be extremely tough and very difficult to drill into or chisel out.AFAICT, these (wood or steel, here) can't be drilled as that would compromise
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