UL-248-11:2011 pdf free download – STANDARD FOR SAFETY Low-Voltage Fuses – Part 11: Plug Fuses.
This is the harmonized ANCE, CSA, and UL standard for Low-Voltage Fuses — Part 11: Plug Fuses. It is the second edition of NMX-J-009/248/11-ANCE, the third edition of CSA C22.2 No. 248.11-11, and the third edition of UL 248-11. This edition of NMX-J-009-248/11-ANCE cancels the previous edition published in 2000. This edition of CSA C22.2 No. 248.11-11 supersedes the previous edition published in 2000.
This harmonized standard was prepared by the Association of Standardization and Certification (ANCE), the Canadian Standards Association (CSA), and Underwriters Laboratories Inc., (UL).
This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.
The present Mexican Standard was developed by the CT 32 from the Comite de Normalizacion de Ia Asociacion de Normalizacion y Certificacion, A.C., CONANCE, with the collaboration of the fuse manufacturers and users.
This standard was reviewed by the CSA Subcommittee on Fuses and Fuseholders, 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 Committee.
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 revised requirements.
Where reference is made to a specific number of samples to be tested, the specified number is to 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 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 resulting from conflicts 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 standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identified, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reflect the intent.
7.3 Connections
The design of a plug fuse shall be such that there are no exposed contact parts or other live parts when the fuse is in the fuseholder.
7.3.1 Edison-base and Type C plug fuses
The screwshell of a fuse shall be formed from brass or other suitable copper alloy not less than 0.20 mm (0.008 in) thick. The thickness after forming shall not be less than 0.165 mm (0.0065 in), measured on the flat surface of the bottom of the shell.
If the fusible element is externally soldered to the screwshell, neither the fusible link nor solder shall extend more than 20.6 mm (0.81 in) above the plane of the center contact, and the solder shall not extend farther from the axis of the fuse than the farthest point on the screw shell.
The fuse shall fit the go gauge as shown in Figure C, and also shall not fit the no go gauge as shown in Figure D.