1、CAN/CSA-C22.2 No. 60950-21-03A National Standard of Canada(reaffirmed 2012)Information Technology Equipment Safety Part 21: Remote Power FeedingThe Canadian Standards Association (CSA), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standar
2、ds Council of Canada to the National Standards system in 1973. It is a not-for-profit, nonstatutory, voluntary membership association engaged in standards development and certification activities. CSA standards reflect a national consensus of producers and users including manufacturers, consumers, r
3、etailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and th
4、e environment. Individuals, companies, and associations across Canada indicate their support for CSAs standards development by volunteering their time and skills to CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers a
5、nd the 2000 sustaining memberships together form CSAs total membership from which its Directors are chosen. Sustaining memberships represent a major source of income for CSAs standards development activities. The Association offers certification and testing services in support of and as an extension
6、 to its standards development activities. To ensure the integrity of its certification process, the Association regularly and continually audits and inspects products that bear the CSA Mark. In addition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major ce
7、ntres across Canada and inspection and testing agencies in eight countries. Since 1919, the Association has developed the necessary expertise to meet its corporate mission: CSA is an independent service organization whose mission is to provide an open and effective forum for activities facilitating
8、the exchange of goods and services through the use of standards, certification and related services to meet national and international needs. For further information on CSA services, write to Canadian Standards Association 5060 Spectrum Way, Suite 100 Mississauga, Ontario, L4W 5N6 Canada The Standar
9、ds Council of Canada is the coordinating body of the National Standards system, a federation of independent, autonomous organizations working towards the further development and improvement of voluntary standardization in the national interest. The principal objects of the Council are to foster and
10、promote voluntary standardization as a means of advancing the national economy, benefiting the health, safety, and welfare of the public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international cooperation in the field of standards. A Nation
11、al Standard of Canada is a standard which has been approved by the Standards Council of Canada and one which reflects a reasonable agreement among the views of a number of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of produce
12、rs, users, consumers, and others with relevant interests, as may be appropriate to the subject in hand. It normally is a standard which is capable of making a significant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a standa
13、rd conforms to the criteria and procedures established by the Standards Council of Canada. Approval does not refer to the technical content of the standard; this remains the continuing responsibility of the accredited standards-development organization. Those who have a need to apply standards are e
14、ncouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the latest edition from the organization preparing the standard. The responsibility for approving National Standards of Canada rests with the S
15、tandards Council of Canada 270 Albert Street, Suite 200 Ottawa, Ontario, K1P 6N7 Canada Cette Norme nationale du Canada est offerte en anglais et en franais. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility
16、of the users to judge its suitability for their particular purpose. Registered trade-mark of Canadian Standards Association Update No. 1CAN/CSA-C22.2 No. 60950-21-03April 2007Note: General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit w
17、ww.ShopCSA.ca for information about the CSA Standards Update Service.Title: Information Technology Equipment Safety Part 21: Remote Power Feeding originally published November 2003The following revisions have been formally approved and are marked by a vertical line in the margin on the attached repl
18、acement pages:CAN/CSA-C22.2 No. 60950-21-03 originally consisted of 26 pages, each dated November 2003. It now consists of the following pages: Update your copy by inserting these revised pages.Keep the pages you remove for reference.Revised Title page, copyright page, Contents, Preface, Introductio
19、n, and Clauses 2, 6.2.1, 6.2.2, and 6.3New Table 1Deleted Foreword (CSA) and Foreword (UL)November 2003 9, 1215, and 1926April 2007 18B, 10, 11, and 1618BBlank pageInformation Technology Equipment Safety Part 21:Remote Power FeedingNovember 10, 2003(Title page reprinted: April 23, 2007)This national
20、 standard is based on publication IEC 60950-21, First Edition (2002).Canadian Standards AssociationCAN/CSA-C22.2 No. 60950-21-03First Edition(IEC 60950-21: 2002, MOD)Underwriters Laboratories Inc.UL 60950-21First EditionANSI/UL 60950-21-2007Commitment for AmendmentsThis Standard is issued jointly by
21、 the Canadian Standards Association andUnderwriters Laboratories Incorporated. Amendments to this Standard will bemade only after processing according to the Standards writing procedures byboth the Canadian Standards Association and Underwriters LaboratoriesIncorporated._The following paragraph rega
22、rding purchase information applies only to the CSAStandard:To purchase CSA Standards and related publications, visit CSAs Online Store atwww.ShopCSA.ca or call toll-free 1-800-463-6727 or 416-747-4044._The following paragraphs regarding ANSI approval, revisions and purchaseinformation apply only to
23、the UL Standard:The most recent designation of ANSI/UL 60950-21 as an American NationalStandard (ANSI) occurred on April 23, 2007.This ANSI/UL Standard for Safety, which consists of the First Edition withrevisions through April 23, 2007, is under continuous maintenance, whereby eachrevision is ANSI
24、approved upon publication.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set
25、 of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Standards Development System (CSDS) at http:/.To purchase UL Standards, visit COMM 2000 at http
26、:/m- or call toll free 1-888-853-3503.ISBN 1-55397-503-0Copyright 2003Canadian Standards AssociationAll rights reserved. No part of thispublication may be reproduced in anyform whatsoever without the priorpermission of the publisher.ISBN 0-7629-0902-1Copyright 2007Underwriters Laboratories Inc.CONTE
27、NTSPREFACE 4FOREWORD .8AINTRODUCTION .101 Scope .112 Normative references 113 Definitions 114 General requirements 124.1 Power from a telecommunication network (see also 1.4.11 of IEC 60950-1 ) .124.2 Access to energized parts (see also 2.1.1.1 of IEC 60950-1) .124.3 Protection in service access are
28、as (see also 2.1.2 of IEC 60950-1) .124.4 Protection in restricted access locations (see also 2.1.3 of IEC 60950-1) 134.5 Interconnection of equipment .135 Connection to telecommunication networks .136 Remote power feeding .146.1 RFT-C circuit limits 146.2 RFT-V circuit limits 166.3 Separation from
29、other circuits and parts .186.4 Installation instructions 18Annex A (informative) Remote power feeding1A.1 Overview .20A.2 Operational considerations .20A.3 Safety considerations 21A.4 Principle of remote power feeding .22A.4.1 RFT-C circuits 22A.4.2 RFT-V circuits 23A.5 Safety aspects 24A.5.1 Stead
30、y-state body current 24A.5.2 Body resistance 25A.5.3 Charged capacitance 25Annex B (informative) BibliographyAPRIL 23, 2007 CAN/CSA-C22.2 NO. 60950-21-03 UL 60950-21 3DEPREFACEThis is the common CSA and UL Standard for Information Technology Equipment Safety Part 21: Remote Power Feeding. It is the
31、first edition of CAN/CSA-C22.2 No. 60950-21 and thefirst edition of UL 60950-21. This standard is based on IEC 60950-21, first edition.This common standard was prepared by the Canadian Standards Association (CSA) andUnderwriters Laboratories Inc. (UL). The efforts and support of representatives of l
32、eadingindustry companies and organizations are gratefully acknowledged.This Standard is considered suitable for use for conformity assessment within the stated scopeof the Standard.This Standard was reviewed by the CSA Subcommittee on Safety of Electronic Equipmentwithin the Field of Audio/Video, In
33、formation, and Communication Technology, under thejurisdiction of the Technical Committee on Consumer and Commercial Products and the CSAStrategic Steering Committee on Requirements for Electrical Safety, and has been formallyapproved by the CSA Technical Committee.This Standard has been approved as
34、 a National Standard of Canada by the Standards Councilof Canada.This Standard has been approved by the American National Standards Institute (ANSI) as anAmerican National Standard.Note: Although the intended primary application of this Standard is stated in its Scope, it is important to note that i
35、t remainsthe responsibility of the users of the Standard to judge its suitability for their particular purpose.Level of harmonizationThis standard adopts the IEC text with national differences. This standard is published as anequivalent standard for CSA and UL.An equivalent standard is a standard th
36、at is substantially the same in technical content, exceptas follows: Technical national differences are allowed for codes and governmental regulationsas well as those recognized as being in accordance with NAFTA Article 905, for example,because of fundamental climatic, geographical, technological, o
37、r infrastructural factors, scientificjustification, or the level of protection that the country considers appropriate. Presentation isword for word except for editorial changes.All national differences from the IEC text are included in the CSA and UL versions of thestandard. While the technical cont
38、ent is the same in each organizations version, the format andpresentation may differ.Reasons for differences from IECThe national differences in this binational Part 21 Standard are included to reference thebinational version of IEC 60950-1, which is designated as CAN/CSA-C22.2 No. 60950-1/UL60950-1
39、 and to address issues related to references to the first and second editions of CSA/UL60950-1.APRIL 23, 2007CAN/CSA-C22.2 NO. 60950-21-03 UL 60950-214DEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEInterpretationsThe interpretation by the standards development organization
40、 of an identical or equivalentstandard is based on the literal text to determine compliance with the standard in accordancewith the procedural rules of the standards development organization. If more than oneinterpretation of the literal text has been identified, a revision is to be proposed as soon
41、 aspossible to each of the standards development organizations to more accurately reflect theintent.CSA effective dateThe effective date for CSA International will be announced through CSA Informs or a CSAcertification notice.UL effective dateThe effective date for UL is available on ULs website at
42、.GeneralNational differences from the text of the International Electrotechnical Commission (IEC)Publication 60950-21, Information Technology Equipment Safety Part 21: Remote PowerFeeding, Copyright 2002, are indicated by the following margin notations:There are six types of national differences, as
43、 noted below. The national difference type is notedin the margin next to the affected text. The standard may not include all types of these nationaldifferences.D1 national differences based on national regulatory requirements which result inequivalent or more stringent requirements than in IEC 60950
44、-21.D2 national differences based on other than national regulatory requirements whichresult in equivalent or more stringent requirements than in IEC 60950-21.DI national differences based on IEC final draft international standards (FDIS). DInational differences may be less stringent than, equivalen
45、t to, or more stringent thanrequirements in IEC 60950-21.DC national differences based on UL and CSA component requirements. DCnational differences may be less stringent than, equivalent to, or more stringent thancomponent requirements in IEC 60950-21.D3 national differences based on binational requ
46、irements which result in lessstringent requirements than in IEC 60950-21.DE editorial national differences that correct typographical errors in IEC 60950-21 orrevise the terminology, but do not alter the technical intent of the requirements. Thisnotation is also used for informative statements such
47、as the Preface and Foreword.National differences have been incorporated into the body of the standard. If national differencesnecessitate the deletion of IEC 60950-21 text, the IEC 60950-21 text has been retained but hasbeen lined out. Text added as a result of national differences has been underlin
48、ed. Text addedas the Preface is not underlined.APRIL 23, 2007 CAN/CSA-C22.2 NO. 60950-21-03 UL 60950-21 5DEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEThe text, figures, and tables of International Electrotechnical Commission Publication 60950-21,Information Technology
49、Equipment Safety Part 21: Remote Power Feeding, Copyright 2002,are used in this standard with the consent of the International Electrotechnical Commission.The International Electrotechnical Commission Foreword and Introduction are not a part of therequirements of this standard but are included for information purposes only.APRIL 23, 2007CAN/CSA-C22.2 NO. 60950-21-03 UL 60950-216DEDEDEDEDEThis page intentionall
