ࡱ> GIFg &bjbjJJ ;<(ub(ub8,,'.22HHH^'`'`'`'`'`'`'$ )+'"'HH'l"l"l"RHH^'l"^'l"l"$\%H@XB R8%J''0'T%{, {,\%\%{,6&l"''l"'{,B T: SECTION 262813 - FUSES Latest Update 5-6-2017 See underlined text for Edits. (Engineer shall edit specifications and blue text in header to meet project requirements. This includes but is not limited to updating Equipment and/or Material Model Numbers indicated in the specifications and adding any additional specifications that may be required by the project. Also turn off all Underlines.)Last Update: 6.9.11. Reformatted and See Underlined Text. (Engineer shall edit specifications and blue text in header to meet project requirements. This includes but is not limited to updating Equipment and/or Material Model Numbers indicated in the specifications and adding any additional specifications that may be required by the project.) GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this section and all other sections of Division 26. SUMMARY Section Includes: Cartridge fuses rated 600-V ac and less for use in [control circuits] [enclosed switches] [switchboards] and [enclosed controllers]. Plug fuses rated 125-V ac and less for use in plug-fuse-type [enclosed switches] and [fuse holders]. Retain first subparagraph below if retaining rejection-base-type plug fuses and if Project contains fuseholders with Edison-base, plug-fuse sockets. Spare-fuse cabinets. SUBMITTALS Product Data: For each type of product indicated. Include construction details, material, dimensions, descriptions of individual components, and finishes for spare-fuse cabinets. Include the following for each fuse type indicated: Dimensions and manufacturer's technical data on features, performance, electrical characteristics, and ratings. Retain four subparagraphs below if final system short-circuit and coordination studies will be performed by the designer or will be assigned to an independent consultant. Current-limitation curves for fuses with current-limiting characteristics. Time-current coordination curves (average melt) and current-limitation curves (instantaneous peak let-through current) for each type and rating of fuse. Coordination charts and tables and related data. Retain subparagraph below if Project includes elevators and fused elevator shunt-trip switches. Fuse sizes for elevator feeders and elevator disconnect switches. Operation and Maintenance Data: For fuses to include in emergency, operation, and maintenance manuals. In addition to items specified in Division01 Section "Operation and Maintenance Data," include the following: Ambient temperature adjustment information. Current-limitation curves for fuses with current-limiting characteristics. Time-current coordination curves (average melt) and current-limitation curves (instantaneous peak let-through current) for each type and rating of fuse. Coordination charts and tables and related data. QUALITY ASSURANCE Source Limitations: Obtain fuses, for use within a specific product or circuit, from single source from single manufacturer. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, by a qualified testing agency, and marked for intended location and application. Comply with NEMAFU1 for cartridge fuses. Comply with NFPA70. Comply with UL248-11 for plug fuses. PROJECT CONDITIONS Where ambient temperature to which fuses are directly exposed is less than [400F] or more than [1000F] , apply manufacturer's ambient temperature adjustment factors to fuse ratings. COORDINATION Coordinate fuse ratings with utilization equipment nameplate limitations of maximum fuse size and with system short-circuit current levels. EXTRA MATERIALS Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. Fuses: Equal to 10 % of quantity installed for each size and type, but no fewer than [two] of each size and type. WARRANTY/GUARANTEE See Division 26 Specification Section Basic Electrical Requirements for warranty and guarantee requirements. PRODUCTS MANUFACTURERS Manufacturers: Subject to compliance with requirements, provide products by one (1) of the following: Cooper Bussmann, Inc. Edison Fuse, Inc. Ferraz Shawmut, Inc. Littelfuse, Inc. CARTRIDGE FUSES Characteristics: NEMAFU1, nonrenewable cartridge fuses with voltage ratings consistent with circuit voltages. SPARE-FUSE CABINET Characteristics: Wall-mounted steel unit with full-length, recessed piano-hinged door and key-coded cam lock and pull. Size: Adequate for storage of spare fuses specified with [fifteen (15)] percent spare capacity minimum. Finish: Gray, baked enamel. Identification: "SPARE FUSES" in one and one half (1-1/2) inch- high letters on exterior of door. Fuse Pullers: For each size of fuse, where applicable and available, from fuse manufacturer. EXECUTION EXAMINATION Examine fuses before installation. Reject fuses that are moisture damaged or physically damaged. Examine holders to receive fuses for compliance with installation tolerances and other conditions affecting performance, such as rejection features. Examine utilization equipment nameplates and installation instructions. Install fuses of sizes and with characteristics appropriate for each piece of equipment. Evaluate ambient temperatures to determine if fuse rating adjustment factors must be applied to fuse ratings. Proceed with installation only after unsatisfactory conditions have been corrected. FUSE APPLICATIONS Cartridge Fuses: ClassT fuses in first subparagraph below are normally used in main switches ahead of meter banks because of their compact size and excellent current-limiting characteristics. Their current-limiting feature often allows using circuit breakers with 10-kA interrupting rating at tenant meters. Service Entrance: [ClassL, fast acting] [ClassL, time delay] [ClassRK1, fast acting] [ClassRK1, time delay] [ClassJ, fast acting] [ClassJ, time delay] [ClassT, fast acting]. Feeders: [ClassL, fast acting] [ClassL, time delay] [ClassRK1, fast acting] [ClassRK1, time delay] [ClassRK5, fast acting] [ClassRK5, time delay] [ClassJ, fast acting] [ClassJ, time delay]. Motor Branch Circuits: [ClassRK1] [ClassRK5], time delay. Other Branch Circuits: [ClassRK1, time delay] [ClassRK5, time delay] [ClassJ, fast acting] [ClassJ, time delay]. Control Circuits: ClassCC, [fast acting] [time delay]. INSTALLATION Install fuses in fusible devices. Arrange fuses so rating information is readable without removing fuse. Retain first paragraph below if TypeS, rejection-base plug fuses are required for installation in existing facilities having fuseholders with Edison-base fuse sockets, or when fuseholders with Edison-base fuse sockets are specified for new construction. Install spare-fuse cabinet(s). IDENTIFICATION Install labels complying with requirements for identification specified in Division26 Section "Identification for Electrical Systems" and indicating fuse replacement information on inside door of each fused switch and adjacent to each fuse block, socket, and holder. END OF SECTION 262813     챬, Baltimore Bressler Research Building Seventh Floor Renovation. 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