1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories (UL). Itis normative for the applicable
2、UL Product Certification Program(s); however, it is currently not part ofthe UL Standard(s) referenced below.Product Category (CCN): NIMXStandard Number: UL 508Edition Date: January 28, 1999Edition Number: 17Section / Paragraph Reference: Sec. 6.5 and 11DECISION:6.5.1 A polymeric electrical enclosur
3、e shall comply with the applicable requirements in the Standard forPolymeric Materials Use in Electrical Equipment Evaluations, UL 746C and also with the additionalrequirements specified in this standard. See also 6.5.5 and 6.5.6.Exception: With respect to requirements in UL 746C, devices marked for
4、 connection to a Class 2 sourceonly in accordance with par. 63.28, are not required to comply with the flame, impact mold stress andcrush tests.RATIONALE FOR DECISION:The proposed revisions provide for a means of evaluation of enclosed products intended for fieldconnection to Class 2 sources that ac
5、knowledge their limited voltage and energy.Copyright 2007 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby any
6、one. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be responsible to
7、anyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version o
8、f theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 508 -2-No Text on This Page
