UL 4248-11-2007 UL Standard for Safety Fuseholders - Part 11 Type C (Edison Base) and Type S Plug Fuse (First Edition Reprint with Revisions Through and Including April 4 2018)《熔断器.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-11 Fuseholders Part 11: Type C (Edison Base) and Type S Plug FuseUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED

2、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 11: Type C (Edison Base) and Type S Plug Fuse, UL 4248-11 First Edition, Dated February 28, 2007 Summary of Topics This revision to ANSI/UL 4248-11 is being issued

3、 to update the UL approval date per a UL Standards reaffirmation of ANSI/UL 4248-11, NMX-J-009/4248/11-ANCE, and CSA C22.2 No. 4248.11-07. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No pa

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9、re effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. DECEMBER 21, 2012 UL 4248-11 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 21, 2012 UL 4248-11 tr2 No Text on This PageUL C

10、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/11-ANCE First Edition CSA Group CSA C22.2 No. 4248.11-07 First Edition Underwriters Laboratories Inc. UL 4248-11 First Edition Fusehold

11、ers Part 11: Type C (Edison Base) and Type S Plug Fuse February 28, 2007 (Title Page Reprinted: December 21, 2012) ANSI/UL 4248-11-2007 (R2012)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued

12、jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at any time. Revisi

13、ons to this standard will be made only after processing according to the standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the

14、 same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and UL pages. Copyright 2007 ANCE Rights reserved in favor of ANCE. ISBN 1-55436-047-1 2007 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without t

15、he prior permission of the publisher. To purchase the CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 18004636727 or 4167474044. This Standard is subject to periodic review, and suggestions for its improvement will be referred to the appro

16、priate committee. To submit a proposal for change, please send the following information to inquirescsagroup.org and include “Proposal for change” in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the proposed change; and rationale for the cha

17、nge. Copyright 2012 Underwriters Laboratories Inc. To purchase UL Standards, visit COMM 2000 at http:/m- or call toll free 18888533503. This ANSI/UL Standard for Safety consists of the First Edition including revisions through December 21, 2012. The most recent designation of ANSI/UL 4248-11 as a Re

18、affirmed American National Standard (ANS) occurred on December 21, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. P

19、roposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, o

20、wnerships, and rights regarding those Standards shall remain the sole and exclusive property of UL.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 General 6 1.1 Scope .6 4 Classication .6 5 Characteristics 6 5.1 Summary

21、 of characteristics 6 6 Marking 7 6.1 Marking of fuseholder .7 7 Construction 7 7.4 Current-carrying parts .7 7.6 Contacts of a cartridge fuseholder 8 7.7 Creepage and clearance 9 7.8A Type S plug fuseholders and adapters 10 8 Tests .18 8.1 General 18 8.4 Verication of temperature rise 18 8.6A Veric

22、ation of contactrejection member effectiveness 21 8.7A Verication of screw shell secureness 21 FEBRUARY 28, 2007 NMX-J-009/4248/11-ANCE CSA C22.2 NO. 4248.11-07 UL 4248-11 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the

23、common ANCE, CSA Group, and UL standard for Fuseholders Part 11: Type C (Edison Base) and Type S Plug Fuse. It is the rst edition of NMX-J-009/4248/11-ANCE, the rst edition of CSA C22.2 No. 4248-11, and the rst edition of UL 4248-11. This common standard was prepared by the Association of Standardiz

24、ation and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the CANENA Technical Harmonization Subcommittee 32B Fuseholders are gratefully appreciated. This standard is considered suitable for use for conformity assessment within the stated scope of t

25、he standard. This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Commi

26、ttee. This standard will be submitted to the Standards Council of Canada for approval as a National Standard of Canada. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. A UL standard is current only if it incorporates the most rece

27、ntly adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. Where reference is made to a specic number of samples to be tested, the specied number shall be considered a minimum quantity. Note: Although the intended primary appl

28、ication of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard is published as an identical standard for ANCE, CSA Group, and UL. An i

29、dentical standard is a standard that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Interpretations The interpretation by the standards development orga

30、nization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identied, a revision is to be propose

31、d as soon as possible to each of the standards development organizations to more accurately reect the intent. ANCE effective date The effective date for ANCE will be announced through the Diario Ocial de Ia Federacin (Official Gazette) and is indicated on the cover page. DECEMBER 21, 2012 NMX-J-009/

32、4248/11-ANCE CSA C22.2 NO. 4248.11-07 UL 4248-11 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group effective date The effective date for CSA Group will be announced through CSA Informs or a CSA Group certication notice. UL effective

33、 date As of November 2, 2009 all products Listed or Recognized by UL must comply with the requirements in this standard. Between February 28, 2007 and November 2, 2009, new product submittals to UL may be evaluated under all requirements in this standard or, if requested in writing, evaluated under

34、presently effective requirements only. The presently effective requirements are contained in the 10 th edition of UL 512. A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. DECEMBER 21, 2012 NMX-J-009/4248/11-ANCE CSA C22.2 NO. 424

35、8.11-07 UL 4248-11 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Fuseholders Part 11: Type C (Edison Base) and Type S Plug Fuse 1 General This Part is intended to be read together with the Standard for Fuseholders Part 1: General Requirem

36、ents hereafter referred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirements of Part 1 apply unless modied by this Part. For Clauses not shown below, refer to the Standard for Fuseholders Part 1: General Requirements, NMX-J-009-4248

37、-ANCE CSA C22.2 No. 4248.1 UL 4248-1. 1.1 Scope 1.1.2 These requirements cover: a) fuseholders intended for use with Type C (Edison-base) and Type S Plug Fuses as described in NMX-J-009/248/11-2000-ANCE, CSA C22.2 No. 248.11, UL 248-11, Low-Voltage Fuses Part 11: Plug Fuses; b) devices intended to b

38、e added to Edison-base fuseholders to reject fuses with larger ampere ratings; and c) devices intended to adapt Type S plug fuses for use in Edison-base fuseholders. 4 Classication 4.1 Plug fuse fuseholders have a short-circuit withstand rating of 10,000 A. Plug fuse fuseholders are rated 250 V or l

39、ess, and may be of Edison-base or Type S base design. 5 Characteristics 5.1 Summary of characteristics 5.1.3 Voltage and current rating 5.1.3.1 Plug fuse fuseholders shall be rated 125, 127, or 250 V. 5.1.3.2 Plug fuse fuseholders shall be rated 15, 20, or 30 A. FEBRUARY 28, 2007 NMX-J-009/4248/11-A

40、NCE CSA C22.2 NO. 4248.11-07 UL 4248-11 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.1.4 Withstand rating 5.1.4.1 Plug fuse fuseholders shall have a short-circuit withstand rating of a 10,000 A. 6 Marking 6.1 Marking of fuseholder 6.1.

41、1.1 In addition to the requirements of Part 1, Clauses 6.1.1.2 and 6.1.1.3 shall apply. 6.1.1.2 The marked current rating of a Type S fuseholder shall be located so that it will be plainly visible after installation. 6.1.1.3 A Type S adapter need not be marked with a withstand rating if the smallest

42、 unit package is marked Withstand Rating 10,000 rms amperes when installed in an Edison-base fuseholder marked 10,000 rms amperes. 7 Construction 7.4 Current-carrying parts 7.4.1 Except for plated No. 10 and larger wire-binding screws and nuts and stud terminals, iron or steel, plain or plated, shal

43、l not be used for parts that are depended upon to carry current. A plated iron or steel washer may be used under the center contact of an Edison-base plug fuseholder. 7.4.2 In a plug-fuseholder assembly intended for the connection of 15 A branch circuits, the ampacity of bus bars shall be as specied

44、 in Table 7.4A. Table 7.4A Minimum ampacity of bus bars Total number of fuses per ungrounded bus bar a Minimum ampacity 2-wire mains 125 250 V, 3-wire mains 3-phase, 4-wire mains 23 03 03 0 33 53 33 1 44 84 24 0 56 65 0 66 66 0 7o r8 8 4 9o r1 0 1 0 0 11 or 12 120 a For an assembly that has an unequ

45、al number of fuses per ungrounded bus bar, calculations shall be based on the larger number of fuses per ungrounded bus bar. FEBRUARY 28, 2007 NMX-J-009/4248/11-ANCE CSA C22.2 NO. 4248.11-07 UL 4248-11 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO

46、N FROM UL 7.6 Contacts of a cartridge fuseholder This section of Part 1 is not applicable to plug fuse fuseholders. The following requirements replace this section of Part 1. 7.6.1 Screw shells of Edison-base plug fuseholders 7.6.1.1 The thickness of the screw shell of a plug fuseholder, measured on

47、 the at surface of the bottom of the shell, shall not be less than 0.30 mm (0.012 in). 7.6.1.2 The screw shell of a plug fuseholder shall be made of copper or copper alloy. Aluminum or an aluminum alloy shall not be used. 7.6.1.3 A screw shell shall be of the medium-base size and shall, when tested

48、with gauges made in conformity with the American National Standard Dimensions for Rolled Threads for Screw Shells of Electric Lampholders and for Screw Shells of Unassembled Lamp Bases, ANSI C81.1, go and not go as applicable. 7.6.1.4 The distance between the center contact and the plane of the edge

49、 of the insulation material surrounding the screw shell of a plug fuseholder, dimension K in Figure 7.6A, shall not be less than 19.1 mm (0.750 in) nor more than 20.6 mm (0.812 in). The distance between the center contact and the plane of the outer edge of the screw shell, dimension L, shall not be less than 14.3 mm (0.562 in) nor more than 17.5 mm (0.687 in). In a fuseholder with a spring-type cen