1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-8 Fuseholders Part 8: Class JUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
2、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 8: Class J, UL 4248-8 First Edition, Dated February 28, 2007 Summary of Topics The following changes in requirements to the Standard for Fuseholders - Part 8: Class J, UL 4248-8, are being proposed:
3、Revision to stud diameter in Figure 7.6C table. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The revised requirements are substantially in accordance with Proposal(s) on this subject dated December 23, 2011. Al
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9、sed and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 24, 2013 UL 4248-8 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 24, 2013 UL 4248-8 tr2 No T
10、ext on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/8-ANCE First Edition CSA Group CAN/CSAC22.2 No. 4248.8-07 First Edition Underwriters Laboratories Inc. UL 4248-8 Fi
11、rst Edition Fuseholders Part 8: Class J February 28, 2007 (Title Page Reprinted: October 24, 2013) ANSI/UL 4248-8-2013 Approved byUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by th
12、e Association of Standardization and Certication (ANCE), the Canadian Standards Association (CSA), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA, or UL at any time. Revisions to this standard will be made only a
13、fter processing according to the standards development procedures of ANCE, CSA, and UL. CSA 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 same revisions into a new edition of the standard b
14、earing the same date of issue as the CSA and UL pages. Copyright 2007 ANCE Rights reserved in favor of ANCE. ISBN 1-55436-045-5 2007 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. To purchase CSA Stan
15、dards and related publications, visit CSAs Online Store at www.ShopCSA.ca or call toll-free 18004636727 or 4167474044. Copyright 2013 Underwriters Laboratories Inc. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a
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17、ose Standards shall remain the sole and exclusive property of UL. To purchase UL Standards, visit COMM 2000 at http:/m- or call toll free 18888533503. The most recent designation of ANSI/UL 4248-8 as an American National Standard (ANSI) occurred on October 24, 2013. The ANSI approval for this standa
18、rd does not include the Cover Page, Transmittal Pages, Title Page, Preface, or effective date information. The ANSI/UL Standard for Safety consists of the First Edition including revisions through October 24, 2013.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOU
19、T PERMISSION FROM UL CONTENTS Preface .4 1 General 6 1.1 Scope .6 4 Classication .6 5 Characteristics 6 5.1 Summary of characteristics 6 6 Marking 6 6.1 Marking of fuseholder .6 7 Construction 6 7.6 Contacts of a cartridge fuseholder 6 8 Tests .10 8.1 General 10 8.4 Verication of temperature rise 10
20、 FEBRUARY 28, 2007 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common ANCE, CSA, and UL standard for Fuseholders Part 8: Class J. It is the rst edition of NMX-J
21、-009/4248/8-ANCE, the rst edition of CSA C22.2 No. 4248-8, and the rst edition of UL 4248-8. This common standard was prepared by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (CSA), and Underwriters Laboratories Inc. (UL). The efforts and support of t
22、he CANENA Technical Harmonization Subcommittee 32B Fuseholders are gratefully appreciated. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction o
23、f 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 Committee. This standard will be submitted to the Standards Council of Canada for approval as a National Standard o
24、f 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 recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of
25、 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 application of this standard is stated in its scope, it is important to note that it remains the responsibility of
26、 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, and UL. An identical standard is a standard that is exactly the same in technical content except for national differences result
27、ing from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standa
28、rd 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 proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. ANCE e
29、ffective 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. FEBRUARY 28, 2007 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DI
30、STRIBUTION WITHOUT PERMISSION FROM UL CSA effective date The effective date for CSA International will be announced through CSA Informs or a CSA certication notice. UL effective date As of November 2, 2009 all products Listed or Recognized by UL must comply with the requirements in this standard. Be
31、tween 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 presently effective requirements only. The presently effective requirements are contained in the 10 th edition of UL 512. A
32、 UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. JANUARY 31, 2008 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL
33、Fuseholders Part 8: Class J 1 General This Part is intended to be read together with the Standard for Fuseholders Part 1: General Requirements, hereafter referred to as Part 1. The numbering of the Clauses in this Part correspond to like numbered Clauses in Part 1. The requirements of Part 1 apply u
34、nless modied by this Part. For Clauses not shown below, refer to the Standard for Fuseholders Part 1: General Requirements, NMX-J-009-4248-ANCE CSA C22.2 No. 4248.1 UL 4248-1. 1.1 Scope 1.1.2 These requirements cover fuseholders intended for use with Class J Fuses as described in NMX-J-009/248/8-200
35、0-ANCE, CSA C22.2 No. 248.8, UL 248-8, Low-Voltage Fuses Part 8: Class J Fuses. 4 Classication 4.1 Class J fuseholders have a short-circuit withstand rating of 200,000 A. Class J fuseholders are rated 600 V, and are divided into six body sizes corresponding to the Class J fuse body sizes. 5 Characte
36、ristics 5.1 Summary of characteristics 5.1.3 Voltage and current rating 5.1.3.1 Class J fuseholders shall be rated 600 V. 5.1.3.2 Class J fuseholders shall be rated 30, 60, 100, 200, 400, or 600 A. 5.1.4 Withstand rating 5.1.4.1 Class J fuseholders shall have a short-circuit withstand rating of a 20
37、0,000 A. 6 Marking 6.1 Marking of fuseholder 6.1.1.1 In addition to the requirements of Part 1: the fuseholder shall be marked Use Class J Fuses . 7 Construction 7.6 Contacts of a cartridge fuseholder 7.6.1 The dimensions of a Class J fuseholder shall be as specied in Figures 7.6A, 7.6B, or 7.6C, wh
38、ichever is applicable. This is generated text for gtxt. FEBRUARY 28, 2007 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 7.6A Class J 30 and 60 A fuseholder Class of fuse Poten
39、tial rating of fuse, volts Current rating of fuse, amperes Dimensions of a class J fuseholder not bolted in place Dimensions, mm (in) BCDE G Distance a between contact clips Minimum width of contact clip Diameter of ferrule Thickness of blade Distance between end stops Minimum Maximum J 600 30 31.75
40、 (1.250) 12.7 (0.5) 20.62 (0.812) 57.94 (2.281) 60.32 (2.375) 60 28.58 (1.125) 15.88 (0.625) 26.97 (1.062) 61.11 (2.406) 63.5 (2.5) 100 69.85 (2.750) 22.22 (0.875) 3.18 (0.125) 200 79.38 (3.5) 31.75 (1.250) 4.75 (0.187) 400 88.9 (3.5) 44.45 (1.750) 6.35 (0.250) 600 98.43 (3.875) 50.8 (2.0) 9.52 (0.3
41、75) a Tolerances for the B dimensions are: 60 amperes or less: plus 0.79 mm (0.032 in) and minus 1.57 mm (0.062 in); 100 and 200 amperes: plus 1.57 mm (0.062 in) and minus 0.76 mm (0.032 in); 400 and 600 amperes: plus 2.36 mm (0.093 in). FEBRUARY 28, 2007 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-0
42、7 UL 4248-8 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 7.6B Class J 100, 200, 400, and 600 fuseholder Class of fuse Potential rating of fuse, volts Current rating of fuse, amperes Dimensions of a class J fuseholder not bolted in
43、 place Dimensions, mm (in) BCDE G Distance a between contact clips Minimum width of contact clip Diameter of ferrule Thickness of blade Distance between end stops Minimum Maximum J 600 30 31.75 (1.250) 12.7 (0.5) 20.62 (0.812) 57.94 (2.281) 60.32 (2.375) 60 28.58 (1.125) 15.88 (0.625) 26.97 (1.062)
44、61.11 (2.406) 63.5 (2.5) 100 69.85 (2.750) 22.22 (0.875) 3.18 (0.125) 200 79.38 (3.5) 31.75 (1.250) 4.75 (0.187) 400 88.9 (3.5) 44.45 (1.750) 6.35 (0.250) 600 98.43 (3.875) 50.8 (2.0) 9.52 (0.375) a Tolerances for the B dimensions are: 60 amperes or less: plus 0.79 mm (0.032 in) and minus 1.57 mm (0
45、.062 in); 100 and 200 amperes: plus 1.57 mm (0.062 in) and minus 0.76 mm (0.032 in); 400 and 600 amperes: plus 2.36 mm (0.093 in). FEBRUARY 28, 2007 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMIS
46、SION FROM UL Figure 7.6C Class J 100, 200, 400, and 600 Fuseholder Fuse bolted in place Current rating of fuse, amperes Dimensions of a class J fuseholder fuses bolted in place Dimensions, mm (in) HI J K Center-to-center of studs or clearance holes a Diameter of stud Diameter of clearance hole Minim
47、um unobstructed clearance End of terminal to center of stud or clearance hole maximum 100 92.07 (3.625) 6.0(0.250) 6.75(0.281) 119.84 (4.718) 9.52 (0.375) 200 111.13 (4.375) 6.0(0.250) 6.75(0.281) 148.41 (5.843) 14.27 (0.562) 400 133.35 (5.250) 10.0 (0.375) 10.5 (0.406) 183.34 (7.281) 19.93 (0.785)
48、600 152.4 (6.0) 12.0 (0.5) 12.5 (0.531) 205.56 (8.093) 25.0 (0.984) NOTE See Figure 7.6C for dimensions B, C, and E. a Tolerance 1.57 mm (0.062 in) OCTOBER 24, 2013 NMX-J-009/4248/8-ANCE CSA C22.2 NO. 4248.8-07 UL 4248-8 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
49、N WITHOUT PERMISSION FROM UL 8 Tests 8.1 General 8.1.1 Types of tests 8.1.1.1.1 Each fuseholder shall be subjected to the tests as specied in Part 1. 8.4 Verication of temperature rise 8.4.3 Test method 8.4.3.1 With dummy fuses in place and carrying rated current continuously, the temperature on a material or component or electrical insulation shall not e
