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): XAPX, SDFYStandard Number: UL 873Standard Title: Standard for Temperature-Indicating and -Regulating EquipmentEdition Date: November 16, 2007Edition Number:
3、12Section / Paragraph Reference: 74.2, 74.4Subject: Clarification of text height for Cautionary MarkingsDECISION:74.2 The marking required by 74.1 shall be in letters not less than 1/8 inch (3.2 mm) high and shall be ina permanent location on the outside of the device or on a stationary - fixed, non
4、removable - part insidethe device. The warning marking placed inside the cover or on the connection diagram attached to theinside of a cover is not acceptable.74.4 A live heat sink or other part likely to be mistaken as dead metal and exposed to persons as specifiedin 23.1.8 and 23.1.9 shall be mark
5、ed with the word CAUTION and the following or the equivalent: Riskof Electric Shock - Plates (or other word describing the type of part) are live - Disconnect power supplybefore servicing. The marking shall be in letters at least 1/8 inch (3.2 mm) high and shall be located onthe live part so as to m
6、ake the risk known before the part is likely to be touched.RATIONALE FOR DECISION:The requirements for the text height for cautionary markings are specified in clause 74.8, as noted below.74.8 A cautionary marking shall be prefixed with the word CAUTION,WARNING, or DANGERin letters not less than 1/8
7、 inch (3.2 mm) high. The remaining letters of such marking, unlessspecified otherwise in individual marking requirements, shall not be less than 1/16 inch (1.6 mm)high.Therefore, to avoid confusion, the strikeout texts in clauses 74.2 and 74.4 are to be deleted.Copyright 2014 Underwriters Laboratori
8、es 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 anyone. Certification Requirement Decisions are the opinion of Underwriters Laborato
9、ries 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 toanyone for the use of or reliance upon Certification Requirement Decisions by any
10、one. 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 of theCertification Requirement Decision is the current version and previously printed copies may be outdated.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis document is published as a service to ULs certification customersSTANDARD NUMBER: UL 873 -2-
