UL 745-2-12 (ND)-2007 National Differences For UL 745-2-12 Particular Requirements for Concrete Vibrators (Second Edition)《混凝土振动器的UL 745-2-12特殊要求的国家差异》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 745-2-12Particular Requirements for Concrete VibratorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational

2、Differences ForUL 745-2-12Particular Requirements for Concrete VibratorsEdition: 2Edition Date: December 7, 2007This new Second edition was issued to clarify the UL effective date statement shown on thePreface page and to make other administrative changes.The Second edition also includes the additio

3、n of a national difference for Clause 23.101 torequire that the supply cord length be not greater than 0.5 m for constructions where the motorand the primary supply switch is located in a separate motor unitAs noted in the Commitment for Amendments statement located on the back side of the titlepage

4、, UL and CSA are committed to updating this IEC-based binational standard jointly.However, this Second edition dated December 7, 2007 will not be issued by CSA since CSAC22.2 No. 745-2-12 is no longer being maintained.This document provides a single listing of the National Differences included in th

5、e UL adoption ofthe corresponding IEC standard. Editorial differences appearing in the UL standard are notincluded in this technical compilation. The complete listing of National Differences is available inthe UL standard.The master for this standards document at ULs Northbrook Office is the officia

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10、lity to use this standards document, even if UL or an authorized UL representative has been advisedof the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this standards document, regardless of the form of the claim.DECEMBER 7, 2007NATIONAL DIF

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19、Laboratories Inc.DECEMBER 7, 2007 NATIONAL DIFFERENCES FOR UL UL 745-2-12 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document provides a single listing of the technical National Differences included in the UL adoptionof the c

20、orresponding IEC standard. Editorial national differences (those marked DE) are not included inthis technical compilation.In its IEC-based standards, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in this document. The standard may n

21、ot use all types of thesedeviations.DR - These are deviations based on the National Electrical Code (NEC) and other U.S. RegulatoryRequirements.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise safety for U.S. consumers and us

22、ers of products.D2 - These are deviations based on safety practices. These are deviations for IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based on the component standards

23、 and will not be deleted until a particularcomponent standard is harmonized with the IEC component standard.DE - These are deviations based on editorial comments or correctionsDECEMBER 7, 2007NATIONAL DIFFERENCES FOR UL UL 745-2-124UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDI

24、STRIBUTION WITHOUT PERMISSION FROM ULNational Differences23.101DV DR Modification: Replace the first paragraph of Clause 23.101 of the Part 2:The supply cable of a concrete vibrator of the type that comprises a motor unit and themains switch shall have a length not greater than 0.5 m. The supply cab

25、le of a concretevibrator of the type to which the in-line switch or an in-line handle with integral switch isconnected to the flexible hose containing the interconnecting cable shall have a length ofat least 5 m.DECEMBER 7, 2007 NATIONAL DIFFERENCES FOR UL UL 745-2-12 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 7, 2007NATIONAL DIFFERENCES FOR UL UL 745-2-126No Text on This Page