Hmm?

Have you actually read your NEC? CAT-5 is perfectly
legal and safe so long as you maintain the legal
.25 minimum distance requirement. I have had dozens
of electrical inspectors look at my wiring with
no negative comments.

If you are not qualified to do Hi and/or low voltage
work, hire someone who is.

On a side note, Lutron makes multi gang boxes
that have a plastic partition in them for just
this purpose. Further they have, or are going
to modify the faceplates on newer models so as
to provide more space for a hidden emitter.

Regarding box depth, If its a retrofit job, I
yank out the old box and install a roomy Pass
Seymour grey old work box, this provides for lots
of space for the Graphic Eye, those blue Carlon
boxes are not worth the effort.

David

20 years electrical experience.