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RFB4S-FC12 Resource RFB Series Fire Classified 4-Gang Floor Box

RFB4S-FC12 Wiremold
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Legrand® takes Resource RFB® Series Floor Boxes to the next level with the introduction of four recessed style floor box models that meet or exceed UL Fire Classification requirements. Available in 2-gang and 4-gang versions. These floor boxes preserve the two-hour and three-hour fire rating of floors in which they have been installed and are a favored industry solution for getting power, communication, and audio video services into open spaces. These new boxes also accept existing cover plate and service fitting offerings. When properly installed, Fire Classified Floor Boxes save time and money for general contractors and installers by eliminating the need for spraying to fireproof floors. They also eliminate the guesswork for inspectors and provide reassurance for building owners and property managers by meeting or exceeding the UL Fire Classification Standards for Floor Boxes.
Application Sector Commercial


  • 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 3-hour fire rating of floors in which it has been installed.


General Info
Product Line Wiremold
UPC Number 786776184228
Country Of Origin United States
Construction Assembled
Number of Knockouts 1
Application Sector Commercial
Standard cULus Listed Metallic Outlet Boxes: File E2961 Guide QCIT, Meets Article 314.27(C) of NEC.
Type Floor Box
Cubic Capacity 22.5 cu in
Additional Information
RoHS Conformant Yes This product meets the material restrictions of Article 4 of the RoHS Directive (2011/65/EU), including Commission Delegated Directive 2015/863.
Listing Agencies / 3rd Party Agencies
cULus ListingNumber  E2961
cULus Listed  Yes
Buy American Act Compliance
Technical Information
Cable Entry Conduits in


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