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UL 2255 Ed. 3-2021

Receptacle Closures - Published Date: September 25, 2025

1 Scope 1.1 These requirements cover products which are molded of insulating material and are intended to cover the outlet slots of receptacles having 1-15R and 5-15R configurations in accordance with Wiring Devices-Dimensional Specifications, ANSI/NEMA WD6.  1.2 These requirements do not cover insulating devices provided to cover the unused outlets of a multi-outlet cord connector employed on a general-use cord set. The requirements for these devices are contained in the Standard for Cord Sets and Power-Supply Cords, UL 817.  1.3 These requirements do not cover receptacle closures provided as part of a flush device cover plate. These devices are covered by the requirements in the Standard for Metallic Outlet Boxes, UL 514A, or in the Standard for Nonmetallic Outlet Boxes, Flush-Mounted Boxes, and Covers, UL 514C.

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