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): KMEX/KMEX7Standard Number: UL 2158Standard Title: Standard for Electric Clothes DryersEdition Date: April 6, 2018Edition Number: 5Section / Paragraph Reference: 21.13.3.5Subject: Protective Controls -
3、 clarification of Clause 21.13.3.5DECISION:21.13.3.5 The secondary function control (Clause 17.6.2), door interlock (Clauses 17.1.2, and 17.7.1 (b)and 17.7.2),door lock (Clauses 17.7.1(a), electronic braking means (Clause 17.7.1(b), motor overloadprotection (Clause 21.7), temperature-limiting device
4、s, combination temperature-regulating and -limitingdevices, and any control relied upon for compliance with the abnormal operation testing of Clauses 16,28.14, or 28.15 are considered and shall be tested and evaluated as protective controls.RATIONALE FOR DECISION:Clause 21.13.3.5 requires the door l
5、ock control (Clause 17.7.1) to be tested and evaluated as a protectivecontrol. Clause 21.13.3.5 does not specifically state that Clause 17.7.2 is to be evaluated as a protectivecontrol. However, since Clause 17.7.2 is a continuation of the requirement of Clause 17.7.1(b), this typeof control is to b
6、e evaluated as a protective control.This requirement applies to clothes dryers using a push-to-start switch that sends a logic signal to theappliance control to start the dryer after the door is opened and closed during an operating cycle.This Certification Requirement Decision is intended to docume
7、nt present practice in the application ofthese requirements, and is identical to the 4th edition version of the UL 2158 Certification RequirementDecision dated 2017-12-21.Copyright 2018 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorr
8、ectness of Certification 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 underA
9、merican National 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 connecti
10、on withthe use or 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 2158 -2-No Text on This Page
