Fire Classified 4-Compartment Box. Includes four duplex receptacle brackets. 12 3/4 L x 10 W x 3 7/16 D (324mm x 254mm x 87mm). Fully adjustable. Tunneling from adjacent or opposite compartments only, (not cross compartments). Tunneling can be set to feed all four compartments from one conduit in a single-service application. NOTE: For use in normal weight concrete floors with a minimum pour depth of 4 1/2 (114mm) over the crest of the deck. Floor Box spacing 2' on center and one for every 4 square feet in a span. Four (4) #12 AWG Type THHN Power Conductors or 48 #23 AWG (6 Cat. 6) Tele Data Conductors per gang. This box preserves the 2-hour fire rating of floors in which it has been installed.