1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(
2、s); however, it is currently not part of the UL Standard(s) referencedbelow.Product Category (CCN): YDPU2/8, YDQS2, YDTU2 and YDSW2Standard Number: UL 224Standard Title: Standard for Extruded Insulating TubingEdition Date: March 6, 2006Edition Number: 6Section / Paragraph Reference: (New) Section 5.
3、A and Clause 5.A.1Subject: This CRD supercededs the one dated March 22, 2017DECISION:New Section 5.A and Clause 5.A.15.A Pre-Conditioning and Test Conditions5.A.1 Unless otherwise specified all testing, except flammability, shall be conducted at 235C (739F)and a relative humidity of 5010% RH. Flamma
4、bility testing shall be conducted in still air at a temperatureof 15 35C (59 95F) and a relative humidity of 75%. All samples shall be preconditioned at 235C(739F) and a relative humidity of 5010% for a minimum of 30 minutes prior to test.RATIONALE FOR DECISION:It has come to ULs attention that spec
5、ific preconditions and test conditions are not described in all cases.The addition of Section 5.A and Clause 5.A.1 are intended to define these parameters.Copyright 2017 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certi
6、fication Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of UL LLC. in practically applying therequirements of the standard. They do not represent formal interpretations of the standard underAmerican National
7、 Standards Institute (ANSI) processes. UL LLC shall not be responsible to anyone forthe use of or reliance upon Certification Requirement Decisions by anyone. UL LLC shall not incur anyobligation or liability for damages, including consequential damages, arising out of or in connection withthe use o
8、r reliance upon Certification Requirement Decisions. The electronic version of the CertificationRequirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT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 224 -2-No Text on This Page
