UpCodes logo
Jump To Full Code Chapter
Installation of cellular concrete floor raceways shall comply with 372.18(A) through 372.18(E).
(A) Header
The header shall be installed in a straight line at right angles to the cells. The header shall be mechanically secured to the top of the precast cellular concrete floor. The end joints shall be closed by a metal closure fitting and sealed against the entrance of concrete. The header shall be electrically continuous throughout its entire length and shall be electrically bonded to the enclosure of the distribution center.
(B) Connection to Cabinets and Other Enclosures
Connections from headers to cabinets and other enclosures shall be made by means of listed metal raceways and listed fittings.
(C) Junction Boxes
Junction boxes shall be leveled to the floor grade and sealed against the free entrance of water or concrete. Junction boxes shall be of metal and shall be mechanically and electrically continuous with the header.
(D) Inserts
Inserts shall be leveled and sealed against the entrance of concrete. Inserts shall be of metal and shall be fitted with grounded-type receptacles. An equipment grounding conductor or bonding jumper shall connect the insert receptacles to a positive ground connection provided on the header. Where cutting through the cell wall for setting inserts or other purposes (such as providing access openings between header and cells), chips and other dirt shall not be allowed to remain in the raceway, and the tool used shall be designed so as to prevent the tool from entering the cell and damaging the conductors.
(E) Markers
A suitable number of markers shall be installed for the future location of cells.

Related Code Sections

(C) Wiring Methods and Materials, Junction Boxes
Junction boxes shall be leveled to the floor grade and sealed against the free entrance of water or concrete. Junction boxes shall be of metal ...
(C) Wiring Methods and Materials, Junction Boxes
Junction boxes shall be leveled to the floor grade and sealed against the free entrance of water or concrete. Junction boxes shall be of metal ...