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): OOLR, OOLV, OORAStandard Number: UL 1993Standard Title: Standard for Self-Ballasted Lamps and Lamp AdaptersEdition Date: December 4, 2012Edition Number: 4Sec
3、tion / Paragraph Reference: 8.13.1 (Revised)Subject: Humidity Conditioning Test - R.H. ToleranceThis Certification Requirement Decision (CRD) supercedes prior CRD issued June23, 2011DECISION:The existing tolerances for the Humidity Conditioning test shall be revised as follows:8.13.1 A device intend
4、ed for use in damp or wet locations (see Clauses 7.2 and 7.3) and havingaccessible non-current-carrying metal parts shall be exposed for 48 hours to moist air having a relativehumidity of 93 25%atatemperature of 25 2 C. Following the 48-hour period and while still exposedto moist air, the device sha
5、ll comply with the requirements for dielectric voltage-withstand betweencurrent-carrying parts and accessible non-current-carrying metal parts in accordance with Clause 8.6 andoperate normally. Alternate chamber conditions may be 88 25%atatemperature of 32 2Cor9325 % at a temperature of 28 2 C.RATIO
6、NALE FOR DECISION:This relaxation of the tolerance is being implemented for ease of testing. The existing 2% tolerance isdifficult to achieve with the types of controllers typically found on environmental chambers. Because thistest already requires a high R.H. and extended exposure period, full mois
7、ture saturation is assured.Increasing the tolerance from 2% to 5% will not have a material effect on the ultimate test result.Copyright 2013 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification
8、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 formal interpretations of thestandard under Ame
9、rican 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 damages, arising out of or in connectionwith the
10、 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 1993 -2-No Text on This Page
