In article , Roy Smith wrote:

But, a built-in bookcase with a built-in hinged door in the back to access
the box probably would. If you do it right, it could be quite unobtrusive,
and completely invisible when the shelf is filled with books. I suspect
that would satisfy both the letter and the spirit of the code.

Another option would be to cut a hole in the back of the built-in directly
over the box, and add an extender ring to the box to bring it flush with the
inside surface of the built-in. Then attach the cover plate of your choice.

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.