Steve:
The ones that I have seen are low voltage (12v) with a remote transformer, either magnetic or the new electronic ones.
I have seen guys run zip cord, t'stat wire, you name it thru the walls to the transformer, they buy a red sticker always.
THen you have the lv wire from the puck spliced to romex, and they try to hide the splice in the sheetrock.
Some custom kitchens have a false bottom in the cabinet to facilitate wiring, and a trim piece on the top to conceal the xfr. Some had chases built into the cabinet frame to hide the wiring.
Are ya sure the ones you saw are 120??
John
