A protective tube, often a piece of EMT or rigid conduit, installed through a concrete slab, wall, or framing member. Cables are pulled through this passage to prevent the rough edges of the structure from damaging the wire insulation. It also allows for easier wire replacement in the future.
Heard on the job
We need to core drill and set a two-inch sleeve in the floor for the data guys.
Also heard as
- chase
Do not mix it up with
- Nipple: A nipple connects two enclosures together, while a sleeve protects wire passing through a structural barrier.
Related terms
Pipe
Shop word for conduit of any kind, and as a verb for installing it, as in pipe it.
EMT
Electrical metallic tubing: thin-wall, unthreaded steel conduit joined with set-screw or compression fittings.
Stub-up
Ninety-degree bend that brings conduit straight up from a floor or out from a wall to a set height.