1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): GPWXStandard Number: UL 507Standard Title: Standard for Electric FansEdition Date: December 13, 1999Edition Number: 9Section / Paragraph Reference: 146.1.2Su
3、bject:DECISION:Add the following new clause after 146.1.1:146.1.2 With reference to 146.1.1, leads provided for power-supply connection of a downdraft fan may bebrought out through factory-attached flexible conduit no more than 6 ft (1.80 m) long. An outlet box orconduit fitting shall be provided at
4、 the free end of the conduit, or the conductor insulation at the free endof the conduit shall be protected from the sharp edges of the conduit during shipping by means of a tapewrap, a fiber bushing secured in place, or the equivalent.RATIONALE FOR DECISION:Downdraft fans are generally installed in
5、kitchen base cabinets. Counter-mounted cooking units have asimilar installation position as well as similar electrical wiring needs as down-draft fans. The Standard ForSafety For Household Electric Ranges, UL 858 has provisions for power-supply connection by afactory-provided conduit whip. Based on
6、similarity in the installation of these two types of appliances, thisCertification Requirement Decision clarifies the allowance to use a conduit whip for down-draft fans.Copyright 2016 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee
7、 or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent for
8、mal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential dama
9、ges, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of 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 507 -2-No Text on This Page
