Actually, IMHO, you should put a couple of empty*) tubes into the walls that make future wiring convenient.

Not only data cables but addtional lighting or some 24- or 12V-DC lines if you might use solar panels for 12V-lights later (or a battery-buffered emergency lighting and maybe a car stereo system in the case of power failure.)


Guido



*) two or three strings in them would make it convenient to pull cables thru.


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