UL 50V-2007 INFRARED VIEWPORTS.pdf

ay11,2007 SUBJECT 50V OUTLINE OF INVESTIGATION FOR INFRARED VIEWPORTS ISSUE NUMBER :1 may11,2007 Summary of Topics This is the First issue of the Outline of Investigation for Infrared Viewports ,Subject .Infrared ( )viewports are intended for factory installation in doors or walls of electrical enclosures for installation in ordinary ( non-hazardous)locations to allow the use of IR scanners for monitoring temperatures of the enclosed equipment on which the viewport is installed ,without promising the integrity of the enclosure with respect to access to live parts . The Foreword is no longer located within the UL Standard .For information concerning the use and application of the requirements contained in this Standard ,the current version of the UL Foreword is located on ULStandardslnfoNet at :http ://ulstandardsinfonet.ul . /ulforeword.html spmtwswmolelbrihiSmt COPYRIGHT 2007 UNDERWRITERS LABORATORIES INC 20398862007804pm 2 20 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUBJECT 50V may11,2007 No Text on This Page 20398860077804p LCOPYRIGHTED MATERIA NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D...