1、 National Differences For UL 60745-2-2 Hand-Held Motor-Operated Electric Tools - Safety - Part 2-2: Particular Requirements for Screwdrivers and Impact Wrenches 2 NATIONAL DIFFERENCES FOR UL 6074522 OCTOBER 31, 2014 National Differences For UL 60745-2-2 Hand-Held Motor-Operated Electric Tools - Safe
2、ty - Part 2-2: Particular Requirements for Screwdrivers and Impact Wrenches Edition: 2 Edition Date: March 26, 2004 The revisions dated October 31, 2014 are being issued to incorporate the following proposals and to reflect the latest ANSI approval date for UL 60745-2-2. 1. Addition Of National Diff
3、erence Clauses To Specify Ratchet Drivers In The Scope Of The Standard And To Clarify Test Requirements As They Apply To Ratchet Drivers Note: Annex 2.DVL was originally provided as supplemental information and was considered editorial, Type DE. The annex is now considered no longer necessary, and h
4、as been deleted. This document provides a single listing of the National Differences included in the UL adoption of the corresponding IEC standard. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, m
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9、AL DIFFERENCES FOR UL 6074522 3 Preface This document provides a single listing of the technical National Differences included in the UL adoption of the corresponding IEC standard. In its IEC-based standards, UL uses the notations indicated below to identify national difference type, and these types
10、 are additionally noted in this document. The standard may not use all types of these deviations. D1 - These are deviations which are based on basic safety principles and requirements, elimination of which would compromise safety for U.S. consumers and users of products. D2 - These are deviations ba
11、sed on safety practices. These are deviations for IEC requirements that may be acceptable, but adopting the IEC requirements would require considerable retesting or redesign on the manufacturers part. DC - These are deviations based on the component standards and will not be deleted until a particul
12、ar component standard is harmonized with the IEC component standard. DE - These are deviations based on editorial comments or corrections. DR - These are deviations based on the national regulatory requirements. Each national difference contains a description of what the national difference entails.
13、 Typically one of the following words is used to explain how the text of the national difference is to be applied to the base IEC text: Addition / Add - An addition entails adding a complete new numbered clause, subclause, table, figure, or annex. Addition is not meant to include adding select words
14、 to the base IEC text. Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause, table, figure, or annex without any replacement text. Modification / Modify - A modification is an altering of the existing base IEC text such as the addition, replacement or dele
15、tion of certain words or the replacement of an entire clause, subclause, table, figure, or annex of the base IEC text. 4 NATIONAL DIFFERENCES FOR UL 6074522 OCTOBER 31, 2014 National Differences 1DV D1 Modification: Replace the third paragraph of Clause 1 of the Part 2 with the following: This stand
16、ard applies to screwdrivers, impact wrenches, and ratchet drivers. 3.103DV D1 Addition: Add the following definition to Clause 3 of the Part 2: 3.103DV.1 ratchet driver: Tool intended for tightening and loosening screws, nuts, and the like and equipped with a ratcheting mechanism. Some ratchet drive
17、rs are equipped with a means for switching the direction of rotation 12.1DV D1 Modification: Add the following to Clause 12.1 of the Part 1: The temperature-rise limit specified for the external enclosure does not apply to the enclosure of the ratchet head and reversing control of ratchet drivers. 1
18、2.4DV D1 Modification: Replace the second paragraph of Clause 12.4 of the Part 2 with the following: The impact or ratchet mechanism may be disabled during the test to prevent damage to the brake. 12.5DV D1 Modification: Add the following to Clause 12.5 of the Part 1: The temperature-rise limit spec
19、ified for the external enclosure does not apply to the enclosure of the ratchet head and reversing control of ratchet drivers. 17.2DV D1 Modification: Add the following sentence: During the test, replacement of the carbon brushes shall be allowed, and the tool shall be oiled and greased as in normal
20、 use. 17.2DV.1 D1 Modification: Replace the third paragraph of Clause 17.2 of the Part 2 with the following: For impact wrenches and ratchet drivers, replace the test of part 1 as follows: 17.2DV.2 D1 Modification: Replace the fourth paragraph of Clause 17.2 of the Part 2 with the following: Impact
21、wrenches and ratchet drivers are operated intermittently for 12 h at a supply voltage equal to 1,1 times rated voltage and then for 12 h at a supply voltage equal to 0,9 times rated voltage. OCTOBER 31, 2014 NATIONAL DIFFERENCES FOR UL 6074522 5 17.2DV.3 D1 Modification: Replace the eighth paragraph
22、 of Clause 17.2 of the Part 2 with the following: After this, the impact wrenches and ratchet drivers are operated intermittently for 12 h at a supply voltage equal to 1,1 times rated voltage then for 12 h at a supply voltage equal to 0,9 times rated voltage. 20DV D1 Modification: Delete Clause 20 o
23、f this Part 2. 21DV D1 Modification: Delete Clause 21 of this Part 2. 24.4DV D1 Modification: Replace Clause 24.4 of the Part 2 with the following: This subclause of the Part 1 is applicable. K.12.1DV D1 Modification: Add the following to Clause K.12.1 of the Part 1: The temperature-rise limit specified for the external enclosure does not apply to the enclosure of the ratchet head and reversing control of ratchet drivers.
