1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2255 Receptacle ClosuresUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
2、ION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Receptacle Closures, UL 2255 Second Edition, Dated February 14, 2011 SUMMARY OF TOPICS: This new edition of ANSI/UL 2255 contains the following changes in requirements: 1. Clarication of the Blade Strength Test The new and rev
3、ised requirements are substantially in accordance with Proposal(s) on this subject dated June 1, 2012. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwi
4、se without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, in
5、direct or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for
6、any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable
7、attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard havin
8、g future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. JULY 31, 2012 UL 2255 tr1UL COPYRIGHTED MA
9、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 31, 2012 UL 2255 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 14, 2011 (Title Page Reprinted: July 31, 2012) 1
10、 UL 2255 Standard for Receptacle Closures First Edition February, 1999 Second Edition February 14, 2011 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through July 31, 2012. The most recent designation of ANSI/UL 2255 as an American National Standard (ANSI) occur
11、red on July 31, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request i
12、n ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall
13、 remain the sole and exclusive property of UL. COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC. ANSI/UL 2255-2012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 2 No Text on This PageUL COPYRIGHTE
14、D MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .5 3 Components 5 4 Units of Measurement .6 5 References .6 CONSTRUCTION 6 General 6 7 Insulating Materials 6 8 Dimensions 7 PERFORMANCE 9 Mold Stress Relief Test
15、 .10 10 Blade Strength Test .11 10.1 General .11 10.2 Vertical blade orientation 11 10.3 Horizontal blade orientation, at of blade .11 10.4 Horizontal blade orientation, edge of blade 11 MARKINGS 11 Details .13 APPENDIX A Standards for ComponentsA1 FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 3UL
16、 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INT
17、RODUCTION 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 congurations in accordance with Wiring Devices-Dimensional Specications, ANSI/NEMA WD6. 1.2 These requirements do not cover
18、 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 provide
19、d as part of a ush 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 denition
20、 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 childs access to energized contacts. 3 Components 3.1 Except as indicate
21、d in 3.2, a component of a product covered by this Standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this Standard. 3.2 A component is not required to comply with a specic requirement t
22、hat: 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.
23、4 Specic 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 specied limits, and shall be used only under those specic conditions. FEBRUARY 14, 201
24、1 RECEPTACLE CLOSURES - UL 2255 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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 rst
25、stated value is the requirement. 5 References 5.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 6 General 6.1 A receptacle closure shall not have any colors, pi
26、ctures, brightly colored patterns, or other markings that attract a childs attention or encourage exploration. 6.2 A receptacle closure that is also intended to reduce drafts through a receptacle on an outside wall of a dwelling and that is not intended to restrict a childs access to energized conta
27、cts shall be packaged together with an insulating gasket to be tted behind the receptacle cover plate. The gasket shall comply with the Standard for Conduit, Tubing, and Cable Fittings, UL 514B. 7 Insulating Materials 7.1 A receptacle closure shall employ an insulating material with the following mi
28、nimum ratings: a) Hardness of 70 or greater on the Shore Durometer D scale (when measured for 5 seconds at an ambient temperature of 23 2C 73.4 3.6F); b) Flame class of HB; c) Relative thermal index (RTI) ratings of 60C for the electrical, mechanical with impact and mechanical without impact paramet
29、ers; d) Minimum dielectric strength of 5 kV at the use thickness; and e) Hot-wire ignition (HWI) ratings based upon the ame class of the material as shown in Table 7.1. Exception: An insulating material is not required to comply with the HWI requirements when it complies with the Glow-Wire End-Produ
30、ct Test at 750C as described in the Standard for Polymeric Materials-Use in Electrical Equipment Evaluations, UL 746C. The glow-wire probe shall not be applied to the closure directly behind either of the closure blades during the test. FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 6UL COPYRIGHTED
31、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 7.1 Hot wire ignition (HWI) ratings Flame class HWI performance level class HB 2 V-2 3 V-1 3 V-0 4 8 Dimensions 8.1 The overall dimensions of a receptacle closure shall be sized so that the closure wil
32、l not t entirely into the small parts cylinder shown in Figure 8.1. Receptacle closures that have separable parts, such as the foam-gasket type, shall have each part individually tested for insertion into the small parts cylinder. Separable foam gaskets or separable parts intended to be slipped onto
33、 the blade length of a receptacle closure as identied in 2.2 (b), shall also be individually tested without being frictionally secured to the receptacle closure. The closure is not to be compressed during this evaluation. Exception: Packaging; any separable parts that the user is specically instruct
34、ed to discard either prior to or upon completion of the installation (with the ush-device cover plate installed); and any part or parts that are not separable (i.e. reliably captive upon completed installation of ush-device cover plate) shall not be subjected to the small parts cylinder test. Compli
35、ance is checked by review of the smallest unit packaging instruction. This is generated text for gtxt. FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 8.1 Small parts cylinder a a Small
36、 parts cylinder described in Figure 1 of the Code of Federal Regulations 16 Part 1501, Method for Identifying Toys and Other Articles for Use by Children Under 3 Years of Age Which Present Choking, Aspiration, or Other Ingestion Hazards Because of Small Parts FEBRUARY 14, 2011 RECEPTACLE CLOSURES -
37、UL 2255 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.2 The perimeter of the face of a receptacle closure shall encompass an area equal to or larger than that indicated in Figure 8.2. 8.3 The blades of a receptacle closure shall comply
38、with the blade dimensions specied for the 1-15P conguration in Wiring Devices Dimensional Specications, ANSI/NEMA WD6. A closure provided with a slight taper in the separation between the closure blades at the tip (either toward or away from each other) to increase the ability of the closure to rema
39、in seated in an outlet is considered to comply with this requirement. Exception: The blade thickness of a receptacle closure ranging between 0.050 to 0.075 inches (1.3 to 1.9 mm) outside the minimum blade contact area as shown in Figure 8.3 meets the intent of the requirement. This is generated text
40、 for gtxt. This is generated text for gtxt. Figure 8.2 Minimum closure face dimensions FEBRUARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 9 Mold Stress Relief Test 9.1 A receptacle cl
41、osure shall not show signs of twisting, distortion or other deformation that would affect its ability to be used with a receptacle after being conditioned as described in this Section. Exception: A receptacle closure made of thermosetting material is not required to be subjected to this test. 9.2 Ni
42、ne receptacle closures are to be placed in a circulating air oven maintained at a temperature of 70C (158F) for 7 hours. The devices are to be removed from the oven and allowed to cool to room temperature before determining compliance. Figure 8.3 Minimum blade contact area and blade dimensions FEBRU
43、ARY 14, 2011 RECEPTACLE CLOSURES - UL 2255 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10 Blade Strength Test 10.1 General 10.1.1 The blades of a receptacle closure shall withstand the application of the test forces described in 10.2,
44、10.3 and 10.4 without cracking or breakage. Permanent deection of the closure blade or face upon completion of the testing meets the intent of this requirement. 10.2 Vertical blade orientation 10.2.1 Six receptacle closures are to be subjected to this test. Three closures are to be tested as receive
45、d and three tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face xed in a horizontal plane and its blades projecting downward in a vertical orientation as shown in Figure 10.1. A weight that exerts a force of 20 lbf (89 N) is t
46、o be suspended from each blade in succession. The pull is to be gradually applied and held for one minute. 10.2.1 revised July 31, 2012 10.3 Horizontal blade orientation, at of blade 10.3.1 Six receptacle closures are to be subjected to this test. Three closures are to be tested as received and thre
47、e tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face xed in a vertical plane and its blades projecting horizontally with the at surface of the blade parallel to the ground as shown in Figure 10.1. A force of 20 lbf (89 N) is
48、to be exerted on the at surface of each blade in succession, within 3/16 inch (1.9 mm) of the tip of the blade. The force is to be gradually applied and held for one minute. 10.3.1 revised July 31, 2012 10.4 Horizontal blade orientation, edge of blade 10.4.1 Six receptacle closures are to be subject
49、ed to this test. Three closures are to be tested as received and three tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face xed in a vertical plane and its blades projecting horizontally with the edge of the blade parallel to the ground as shown in Figure 10.1. A force of 20 lbf (89 N) is to be exerted on the edge of each blade in succession, within 3/16 inch (1.9 mm) of the tip of the blade. The force is
