Romex embedded in 1/2 inch of plaster.
I knew an industrial electrician who specialized in that method: Notch drywall to put in some NM-B and then just run a strip of tape and some compound overtop of it.
The H/O sees how easy it is to do, assumes it's code compliant, and suddenly you find that everywhere in the house.
![[Linked Image]](https://www.electrical-contractor.net/ubb/frown.gif)
-John
