UL 2255:2021 pdf download.STANDARD FOR SAFETY-Receptacle Closures.
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.
2 Glossary
2.1 For the purposes of this Standard, the following definition applies.
2.2 RECEPTACLE CLOSURE — A product molded of insulating material intended to be used to cover the outlet slots of a receptacle to:
a) Reduce drafts through a receptacle on an outside wall of a dwelling, or
b) Restrict a child’s access to energized contacts. 3 Components
3.1 Except as indicated in 3.2, a component of a product covered by this Standard shall comply with the
requirements for that component.
3.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or
b) Is superseded by a requirement in this standard.
3.3 A component shall be used in accordance with its rating established for the intended conditions of use.
3.4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions.
4 Units of Measurement
4.1 When a value for measurement is followed by a value in other units in parentheses, the second value may be only approximate. The first stated value is the requirement.UL 2255 pdf download.