UL 2255:2021 free download STANDARD FOR SAFETY Receptacle Closures
1 Scope
1.1 These requirements cover products which are molded of insulating material and are intended tocover the outlet slots of receptacles having 1-15R and 5-15R configurations in accordance with WiringDevices-Dimensional Specifications,ANSINEMA wD6.
1.2These 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 arecontained 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 inthe Standard for Nonmetallic Outlet Boxes, Flush-Mounted Boxes,and Covers, UL 514C.
2Glossary
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 theoutlet slots of a receptacle to:
a) Reduce drafts through a receptacle on an outside wall of a dwelling, orb) 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 therequirements 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 theproduct covered by this standard , or
b) ls superseded by a requirement in this standard.
3.3A component shall be used in accordance with its rating established for the intended conditions ofuse.
3.4Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are intended for use only under limited conditions,such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.
4Units of Measurement
4.1 When a value for measurement is followed by a value in other units in parentheses, the second valuemay be only approximate.The first stated value is the requirement.
5 Referenced Publications
5.1 Any undated reference to a code or standard appearing in the requirements of this Standard shall beinterpreted as referring to the latest edition of that code or standard.
5.2The following publications are referenced in this Standard:
Code of Federal Regulations 16 Part 1501，Method for ldentifying Toys and Other Articles for Use byChildren Under 3 Years of Age Which Present Choking，Aspiration, or Other Ilngestion Hazards Becauseof Small Parts
NEMA WD6, Wiring Devices – Dimensional SpecificationsUL 514A, Metallic Outlet Boxes
UL 514B, Conduit,Tubing, and Cable Fittings
UL 514C, Nonmetallic Outlet Boxes, Flush-Mounted Boxes, and CoversUL 746C, Polymeric Materials – Use in Electrical Equipment EvaluationsUL 817,Cord Sets and Power-Supply Cords
cONSTRUCTION
6 General
6.1 A receptacle closure shall not have any colors, pictures, brightly colored patterns, or other markingsthat attract a child’s attention or encourage exploration.
6.2 A receptacle closure that is also intended to reduce drafts through a receptacle on an outside wall ofa dwelling and that is not intended to restrict a child’s access to energized contacts shall be packagedtogether with an insulating gasket to be fitted behind the receptacle cover plate. The gasket shall complywith UL 514B.
7 Insulating Materials
7.1A receptacle closure shall employ an insulating material with the following minimum ratings:
a) Hardness of 70 or greater on the Shore Durometer D scale (when measured for 5 seconds at anambient temperature of 23 +2°C [73.4+3.6 °F]);
b) Flame class of HB;
c)Relative thermal index (RTI) ratings of 60 ° C for the electrical，mechanical with impact andmechanical without impact parameters;
d) Minimum dielectric strength of 5 kV at the use thickness; and
e)Hot-wire ignition(HWI) ratings based upon the flame class of the material as shown in Table 7.1.
UL 2255:2021 free download
