UL 763 CRD-2017 UL Standard for Safety Motor-Operated Commercial Food Preparing Machines - Section Paragraph Reference 28 28 1 28 1A Subject Wand-type mixers - requirements of app.pdf

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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): IPSTStandard Number: UL 763Standard Title: Standard for Motor-Operated Commercial Food Preparing MachinesEdition Date: January 31, 2012Edition Number: 4Section / Paragraph Reference: 28, 28.1, 28.1ASu

3、bject: Wand-type mixers - requirements of appliances provided with an interlocksystemDECISION:28 Wand-type Mixers (Immersion Blenders)28.1 A hand-held wand-type mixer shall be provided with a momentary contact ON/OFF switch having thefollowing features:a) A distinct and separate motion, in addition

4、to gripping the product, shall be required toenergize the unit;b) The motion shall not be easily defeatible defeatable;c) A single motion shall be required to de-energize the unit; andd) The switch shall not be capable of locking in the ON position.28.1A A non-hand-held wand-type mixer that is:a) in

5、tended to be mechanically attached to a mixing container, andb) provided with an interlock switch that must be actuated only by this mechanical attachmentto the container before ON operation of the appliance can occur,is not required to be provided with the momentary contact ON/OFF switch specified

6、in 28.1. The interlocksystem shall comply with the interlock system requirements of 6.19.3. The mixing container may beprovided with the appliance, or recommended by the manufacturer in the instructions.28.2 A wand-type mixer is considered to comply with 21.1 if it is provided with top and side blad

7、e guardingthat affords the necessary protection for the blade against contact with sides/bottom of bowl surfaces, andthe user against inadvertent blade contact. Any openings in the top and side blade guarding shall notpermit the entrance of the flat end of a 3/8 inch (9.5 mm) diameter rod, when plac

8、ed perpendicular to theguard. As an alternate means of evaluation, any openings in the guarding shall not permit contact of theflat end of a 5/16 inch (8 mm) diameter rod of unlimited length with the blades, when placed at an angleof 45 degrees to the drive shaft. The bottom circular opening shall n

9、ot be guarded in a manner that wouldinterfere with the intended operation of the appliance.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATIONALE FOR DECISION:Non-hand-held wand-type mixers (immersion blenders), may be provided with an inte

10、rlock system thatcan only be actuated when the appliance is physically and mechanically attached to a mixing container.This type of construction only allows the interlock to be activated when the appliance is mounted to thecontainer, which results in the appliance only being capable of being operate

11、d with the appliance bladesenclosed by the container. Since this reduces the risk of physical injury to the user, this type of appliancedoes not need to be provided with a momentary on/off switch, but rather, the appliance interlock is tocomply with the interlock system requirements.This Certificati

12、on Requirement Decision is intended to reflect present practice in the application of theserequirements.Copyright 2017 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that

13、 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 Standards Institute (ANSI) processes. UL LLC shall

14、 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 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 customersSTANDARD NUMBER: UL 763 -2-