I'm sure some code references will be posted by others soon -- meaning I couldn't find a listing requirement either; other than for the cables themselves and raceways (820.179 & .182) -- but here's the applicable section from the UL White Book if it's any help.
[Edit to add] Per 820.3(C), 110.3 still applies; and while it doesn't require listing per se, UL listing is a way to ascertain suitability under 110.3(A)1.
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Source: UL 2006 "White Book"
OPTICAL FIBER/COMMUNICATIONS/SIGNALING/ COAXIAL CABLE OUTLET BOXES
(QAZR)
USE AND INSTALLATION
This category covers outlet boxes and other device-mounting products intended to support outlets for use with or without raceways and fittings that contain nonconductive optical fiber cable, communications cable, signaling cable, and coaxial cable. These products are intended to be installed in accordance with ANSI/NFPA 70, ‘‘National Electrical Code.’’ The products and raceways are only suitable for the installation of the optical fiber, communications cable, signaling cable, and coaxial cable. Individual raceway systems differ in their construction and, therefore, their components are not interchangeable with other raceways or fittings of other systems.
ADDITIONAL INFORMATION
For additional information, see Electrical Equipment for Use in Ordinary Locations (AALZ).
REQUIREMENTS
The basic requirements used to investigate products in this category are contained in UL Subject 2269, ‘‘Outline of Investigation for Optical Fiber/ Communications/Signaling/Coaxial Cable Outlet Boxes.’’
UL MARK
The Listing Mark on the product, or the UL symbol on the product and the Listing Mark of Underwriters Laboratories Inc. on the smallest unit container in which the product is packaged, is the only method provided by UL to identify products manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the UL symbol (as illustrated in the Introduction of this Directory) together with the word ‘‘LISTED,’’ a control number, and the product name ‘‘Optical Fiber Outlet Box,’’ ‘‘Communications Cable Outlet Box’’ or ‘‘Optical Fiber/Communications/Signaling/Coaxial Cable Outlet Box,’’ or other appropriate product name as shown in the individual Listings.
