1、C22.2 No. 4248.12-07(reaffirmed 2012)Fuseholders Part 12: Class RLegalNoticeforStandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by theStandards Council of Canada. This process brings together volunteers representing vari
2、ed viewpoints and interests to achieve consensusand develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it doesnot independently test, evaluate, or verify the content of standards.Disclaimer and exclusion of liabilityThis documen
3、t is provided without any representations, warranties, or conditions of any kind, express or implied, including, withoutlimitation, implied warranties or conditions concerning this documents fitness for a particular purpose or use, its merchantability, or itsnon-infringement of any third partys inte
4、llectual property rights. CSA does not warrant the accuracy, completeness, or currency of anyof the information published in this document. CSA makes no representations or warranties regarding this documents compliance withany applicable statute, rule, or regulation.IN NO EVENT SHALL CSA, ITS VOLUNT
5、EERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES,DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES,HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESSINTERRUP
6、TION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT,TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO ORPOSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMA
7、GES, INJURY, LOSS,COSTS, OR EXPENSES.In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of anyperson or entity or to perform any duty owed by any person or entity to another person or entity. The information in this docu
8、ment isdirected to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibilitywhatsoever arising in any way from any and all use of or reliance on the information contained in this document.CSA is a private not-for-profit company that publishe
9、s voluntary standards and related documents. CSA has no power, nor does itundertake, to enforce compliance with the contents of the standards or other documents it publishes.Intellectual property rights and ownershipAs between CSA and the users of this document (whether it be in printed or electroni
10、c form), CSA is the owner, or the authorizedlicensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), andall inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secre
11、ts are protectedby patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this documentmay violate laws that protect CSAs and/or others intellectual property and may give rise to a right in CSA and/or others to seek legalredress for su
12、ch use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA reserves all intellectualproperty rights in this document.Patent rightsAttention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA shall not b
13、e heldresponsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity ofany such patent rights is entirely their own responsibility.Authorized use of this documentThis document is being provided by CSA for informational and n
14、on-commercial use only. The user of this document is authorized to doonly the following:If this document is in electronic form:.load this document onto a computer for the sole purpose of reviewing it;.search and browse this document; and.print this document.Limited copies of this document in print o
15、r paper form may be distributed only to persons who are authorized by CSA to have suchcopies, and only if this Legal Notice appears on each such copy.In addition, users may not and may not permit others to.alter this document in any way or remove this Legal Notice from the attached standard;.sell th
16、is document without authorization from CSA; or.make an electronic copy of this document.If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document ormake any copies of the contents hereof, and if you do make such copies, you are req
17、uired to destroy them immediately. Use of thisdocument constitutes your acceptance of the terms and conditions of this Legal Notice.Update No. 1C22.2 No. 4248.12-07November 2007Note: General Instructions for CSA Standards are now called Updates. Please contact CSA Information Products Sales or visit
18、 www.ShopCSA.ca for information about the CSA Standards Update Service.Title: Fuseholders Part 12: Class R originally published February 2007The following revisions have been formally approved:Revised Outside front cover and title pageNew National Standards of Canada text Deleted NoneCSA C22.2 No. 4
19、248.12-07 originally consisted of 12 pages, each dated February 2007. It now consists of the following pages:February 2007 312November 2007 Cover, National Standards of Canada text, title page, and copyright page Update your copy by inserting these revised pages.Keep the pages you remove for referen
20、ce.Blank pageA National Standard of CanadaCAN/CSA-C22.2 No. 4248.12-07Fuseholders Part 12: Class R(approved November 2007)LegalNoticeforStandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by theStandards Council of Canada.
21、This process brings together volunteers representing varied viewpoints and interests to achieve consensusand develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it doesnot independently test, evaluate, or verify the content of st
22、andards.Disclaimer and exclusion of liabilityThis document is provided without any representations, warranties, or conditions of any kind, express or implied, including, withoutlimitation, implied warranties or conditions concerning this documents fitness for a particular purpose or use, its merchan
23、tability, or itsnon-infringement of any third partys intellectual property rights. CSA does not warrant the accuracy, completeness, or currency of anyof the information published in this document. CSA makes no representations or warranties regarding this documents compliance withany applicable statu
24、te, rule, or regulation.IN NO EVENT SHALL CSA, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES,DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES,HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL
25、 OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESSINTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT,TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO ORPOSSESSION OR USE OF THIS DOCUMENT, EVE
26、N IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS,COSTS, OR EXPENSES.In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of anyperson or entity or to perform any duty owed by any person or entity
27、to another person or entity. The information in this document isdirected to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibilitywhatsoever arising in any way from any and all use of or reliance on the information contained in this docum
28、ent.CSA is a private not-for-profit company that publishes voluntary standards and related documents. CSA has no power, nor does itundertake, to enforce compliance with the contents of the standards or other documents it publishes.Intellectual property rights and ownershipAs between CSA and the user
29、s of this document (whether it be in printed or electronic form), CSA is the owner, or the authorizedlicensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), andall inventions and trade secrets that may be contained in this
30、 document, whether or not such inventions and trade secrets are protectedby patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this documentmay violate laws that protect CSAs and/or others intellectual property and may give rise to
31、 a right in CSA and/or others to seek legalredress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA reserves all intellectualproperty rights in this document.Patent rightsAttention is drawn to the possibility that some of the elements of this stan
32、dard may be the subject of patent rights. CSA shall not be heldresponsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity ofany such patent rights is entirely their own responsibility.Authorized use of this documentThis
33、document is being provided by CSA for informational and non-commercial use only. The user of this document is authorized to doonly the following:If this document is in electronic form:.load this document onto a computer for the sole purpose of reviewing it;.search and browse this document; and.print
34、 this document.Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have suchcopies, and only if this Legal Notice appears on each such copy.In addition, users may not and may not permit others to.alter this document in any way or rem
35、ove this Legal Notice from the attached standard;.sell this document without authorization from CSA; or.make an electronic copy of this document.If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document ormake any copies of the con
36、tents hereof, and if you do make such copies, you are required to destroy them immediately. Use of thisdocument constitutes your acceptance of the terms and conditions of this Legal Notice.(National Standards of Canada text inserted November 2007)The Canadian Standards Association (CSA), under whose
37、 auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards 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.
38、CSA standards reflect a national consensus of producers and users including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal government
39、s in their regulations, particularly in the fields of health, safety, building and construction, and the 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 supportin
40、g the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and 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
41、activities. The Association offers certification and testing services in support of and as an extension 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 add
42、ition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major centres 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 se
43、rvice organization whose mission is to provide an open and effective forum for activities facilitating 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 toCanadia
44、n Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaThe Standards Council of Canada (SCC) is thecoordinating body of the National StandardsSystem, a coalition of independent, autonomousorganizations working towards the furtherdevelopment and improvement of voluntary
45、standardization in the national interest.The principal objects of the SCC are to fosterand promote voluntary standardization as a meansof advancing the national economy, benefiting thehealth, safety, and welfare of the public, assistingand protecting the consumer, facilitating domesticand internatio
46、nal trade, and furthering internationalcooperation in the field of standards.A National Standard of Canada (NSC) is a standardprepared or reviewed by an accredited Standards Development Organization (SDO) and approved by the SCC according to the requirements of CAN-P-2. Approval does not refer to th
47、e technical content of the standard; this remains the continuing responsibility of the SDO. An NSC reflects a consensus of a number of capable individuals whose collective interests provide, to the greatest practicable extent, a balance of representation of general interests, producers, regulators,
48、users (including 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.Those who have a need to apply standards areencouraged to use NSCs. These
49、 standards are subjectto periodic review. Users of NSCs are cautionedto obtain the latest edition from the SDO which publishes the standard.The responsibility for approving standards as National Standards of Canada rests with theStandards Council of Canada270 Albert Street, Suite 200Ottawa, Ontario, K1P 6N7CanadaCette 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 importantto note that it remains the responsibility of the users to judge its suitability for their p
