I am asking if NEC code permits for in-wall (gang box) mounting of low-voltage transformers and power supples, and if so do these product have a name or term?
My use case is low-voltage electronics mounted to drywall: a small car amplifier, an Arduino, Raspberry pi, some 12v LED strips, powering car-type DC accessories. I am looking to hide as much wiring as possible.
I realize you can't dissipate unlimited heat in the wall. 55 watts - the Class 2 limit - comes out to 12v 5.5A if I did the math right and that's easily enough power.
As examples of failed terms I tried: "doorbell transformers 1 gang" and "in-wall Power over Ethernet supply". We've all seen the 4-port USB 1-gang devices - I want that for 12v.
Please do not answer with specific products/links. I am asking if these things EXIST and whether I have been calling them the wrong name. I have already posed this question before but it was deleted over the holidays (reason: "no shopping for links") so to avoid that experience again I need this strongly worded disclaimer. :-) Thanks all!