UL UL498 ⑧ Underwriters Laboratories Inc . Standard for Safety Attachment Plugs and Receptacles 标准分享网. .免费下载 july1,2009-ul498 Underwriters Laboratories Inc .( ) 333 Pfingsten Road Northbrook ,IL 60062-2096 UL Standard for Safety for Attachment Plugs and Receptacles ,UL 498 Fourteenth Edition .Dated December 26 .2001 Revisions :This Standard contains revisions through and including July 1 ,2009 . SUMMARY OF TOPICS This revision to ANSI /ULincorporates the following : Addition of Requirements to Address an Attachment Plug that Incorporates a Locking Mechanism when Inserted into NEMA Straight Blade Receptacle . Addition of Requirements to Address Separable Terminal Assemblies Revision of Tamper-Resistant Receptacle Definition to Allow its Use in Any Location Specified by the NEC Text that has been changed in any manner is marked with a vertical line in the margin .Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement bees effective . The new and revised requirements are substantially in accordance with UL's Proposal ()on...