When I poured my shop, I added a half dozen or so extra 2 inch electrical conduits under the concrete,,
I wanted the capability to run electrical under the floor, rather than overhead.
I also added two conduits for possible propane lines, and I even added a 1/2" conduit for TV antenna, and land line phone wire,,
(that was 20 years ago)
I have used about half the electrical conduits,,
it is nice to be able to have the capability to upgrade simply,,,the conduit is cheap,,, before the concrete is poured,,,
