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美国UL标准 UL 60950-1 英文版
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UL60950-1 英文
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UL 60950-1
ISBN 0-7629-1238-3
Information Technology
Equipment – Safety – Part 1:
General Requirements
Underwriters Laboratories Inc. (UL)
333 Pfingsten Road
Northbrook, IL 60062-2096
UL Standard for Safety for Information Technology Equipment – Safety – Part 1: General Requirements,
UL 60950-1
Second Edition, Dated March 27, 2007
Summary of Topics
This is the second edition of the bi-national Standard and is based on IEC 60950-1, second
edition.
UL Standards for Safety are developed and maintained in the Standard Generalized Markup Language
(SGML). SGML -- an international standard (ISO 8879-1986) -- is a descriptive markup language that
describes a document’s structure and purpose, rather than its physical appearance on a page. Due to
formatting differences resulting from the use of UL’s new electronic publishing system, please note that
additional pages (on which no requirements have been changed) may be included in revision pages due
to relocation of existing text and reformatting of the Standard.
The new and/or revised requirements are substantially in accordance with UL’s Proposal(s) on this subject
dated October 27, 2006 and February 2, 2007.
As indicated on the back side of the title page (page 2), this UL Standard for Safety is an American
National Standard. Attention is directed to the note on the back side of the title page of this Standard
outlining the procedures to be followed to retain the approved text of this ANSI/UL Standard.
As indicated on the back side of the title page (page 2), this UL Standard for Safety has been adopted by
the Department of Defense.
The UL Foreword is no longer located within the UL Standard. For information concerning the use and
application of the requirements contained in this Standard, the current version of the UL Foreword is
located on ULStandardsInfoNet at: http://ulstandardsinfonet.ul.com/ulforeword.html
The master for this Standard at UL’s Northbrook Office is the official document insofar as it relates to a
UL service and the compliance of a product with respect to the requirements for that product and service,
or if there are questions regarding the accuracy of this Standard.
UL’s Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distribution
diskette for a Standard-on-Diskette and the file for the Standard on the distribution diskette should be
altered in any way. All of UL’s Standards and all copyrights, ownerships, and rights regarding those
Standards shall remain the sole and exclusive property of UL.
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, mechanical photocopying, recording, or otherwise
without prior permission of UL.
Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is current
only if it incorporates the most recently adopted revisions.
UL provides this Standard ″as is″ without warranty of any kind, either expressed or implied, including but
not limited to, the implied warranties of merchantability or fitness for any purpose.
MARCH 27, 2007 − UL 60950-1 tr1
In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,
including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the
inability to use this Standard, even if UL or an authorized UL representative has been advised of the
possibility of such damage. In no event shall UL’s liability for any damage ever exceed the price paid for
this Standard, regardless of the form of the claim.
UL will attempt to answer support requests concerning electronic versions of its Standards. However, this
support service is offered on a reasonable efforts basis only, and UL may not be able to resolve every
support request. UL supports the electronic versions of its Standards only if they are used under the
conditions and operating systems for which it is intended. UL’s support policies may change from
time-to-time without notification.
UL reserves the right to change the format, presentation, file types and formats, delivery methods and
formats, and the like of both its printed and electronic Standards without prior notice.
Purchasers of the electronic versions of UL’s Standards for Safety agree to defend, indemnify, and hold
UL harmless from and against any loss, expense, liability, damage, claim, or judgement (including
reasonable attorney’s fees) resulting from any error or deviation introduced while purchaser is storing an
electronic Standard on the purchaser’s computer system.
If a single-user version electronic Standard was purchased, one copy of this Standard may be stored on
the hard disk of a single personal computer, or on a single LAN file-server or the permanent storage
device of a multiple-user computer in such a manner that this Standard may only be accessed by one user
at a time and for which there is no possibility of multiple concurrent access.
If a multiple-user version electronic Standard was purchased, one copy of the Standard may be stored on
a single LAN file-server, or on the permanent storage device of a multiple-user computer, or on an Intranet
server. The number of concurrent users shall not exceed the number of users authorized.
Electronic Standards are intended for on-line use, such as for viewing the requirements of a Standard,
conducting a word search, and the like. Only one copy of the Standard may be printed from each
single-user version of an electronic Standard. Only one copy of the Standard may be printed for each
authorized user of a multiple-user version of an electronic Standard. Because of differences in the
computer/software/printer setup used by UL and those of electronic Standards purchasers, the printed
copy obtained by a purchaser may not look exactly like the on-line screen view or the printed Standard.
An employee of an organization purchasing a UL Standard can make a copy of the page or pages being
viewed for their own fair and/or practical internal use.
The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,
and/or other elements of the Standard having future effective dates as indicated in the preface. The prior
text for requirements that have been revised and that have a future effective date are located after the
Standard, and are preceded by a ″SUPERSEDED REQUIREMENTS″ notice.
New product submittals made prior to a specified future effective date will be judged under all of the
requirements in this Standard including those requirements with a specified future effective date, unless
the applicant specifically requests that the product be judged under the current requirements. However, if
the applicant elects this option, it should be noted that compliance with all the requirements in this
Standard will be required as a condition of continued Listing, Recognition and Follow-Up Services after
the effective date, and understanding of this should be signified in writing.
Copyright © 2007 Underwriters Laboratories Inc.
MARCH 27, 2007 − UL 60950-1tr2
This Standard consists of pages dated as shown in the following checklist:
Page Date
1-504..........................................................................March 27, 2007
MARCH 27, 2007 − UL 60950-1 tr3
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