Q. Can I pull Type NM cable in a PVC sleeve located in a ground floor slab for the kitchen counter island?
A. No. Type NM cable must not be used in wet or damp locations [334.12(B)(4)].
The interior of enclosures or raceways installed in an underground installation are considered to be a wet location [300.5(B)]. Cables and insulated conductors installed in underground enclosures or raceways must be listed for use in wet locations, according to 310.10(C).
The definition of a “Wet Location” (as noted in Art. 100) includes installations underground, in concrete slabs in direct contact with the earth, locations subject to saturation with water, and unprotected locations exposed to weather. If raceways are installed in wet locations above grade, the interior of these raceways is also considered to be a wet location [300.9].