UL 50E-2007 Enclosures for Electrical Equipment Environmental Considerations.pdf

UL 50E Enclosures for Electrical Equipment ,Environmental Considerations This PDF Standard downloaded from . . SEPTEMBER 4 .2007 - UL50E Underwriters Laboratories Inc .( UL) 333 Pfingsten Road Northbrook .IL 60062-2096 UL Standard for Safety for Enclosures for Electrical Equipment ,Environmental Considerations ,UL 50E First Edition ,Dated September 4 ,2007 Summary of Topics This first edition of ANSI /UL50E is the result of the harmonization effort develop a tri-national standard covering requirements for enclosures for electrical equipment .The first edition of UL 50E contains the additional construction ,performance ,and marking requirements related the environmental type rating designations .The non-environmental construction ,performance , and marking requirements for enclosures are included in the twelfth edition of UL 50 . The new requirements are substantially in accordance with UL's Proposal ()onthis subject dated March 11,2005and August 25,2006. As indicated on the title page ( page1 ),this UL Standard for Safety is an American National Standard . Attention is directed to the note on the title page of this Standard outlining the procedures to be f...