SECTION 16440-2.12 short by u2iYRnM

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									Specification Number: 26 24 13.34
Product Name: MAIN LUGS, FIXED AND/OR GROUP MOUNTED BRANCH FUSIBLE SWITCHES
(SHORT)
                      SECTION 26 24 13.34
                   SWITCHBOARDS (Short)
         Incoming Cable Lugs (Non-Service Entrance)
         Distribution Group &/or Individually Mounted
                        Fusible Switches
PART 2 PRODUCTS
2.01 MANUFACTURERS
       A. Shall be Square D Company or approved equal.
2.02 SWITCHBOARD - GENERAL
       A. Utility Metering Compartment: The utility current transformer compartment shall comply
          with the local utility construction specifications.
       B. Short Circuit Current Rating: Switchboards shall be rated with a minimum short circuit
          current rating of [        ] rms symmetrical amperes at [_____] VAC maximum.
       C. Future Provisions: All unused spaces provided, unless otherwise specified, shall be fully
          equipped for future devices, including all appropriate connectors and mounting hardware.
       D. Enclosure: Type [1 - General Purpose.][1 - With Drip Hood.][3R - Rain tight.]
          1. Sections shall be aligned front and rear.
          2. Removable steel base channels (1.5 inch floor sills) shall be bolted to the frame to rigidly
               support the entire shipping section for moving on rollers and floor mounting.
          3. The switchboard enclosure shall be painted on all exterior surfaces. The paint finish shall
               be a medium gray, ANSI #49, applied by the electro-deposition process over an iron
               phosphate pre-treatment.
          4. All front covers shall be screw removable with a single tool and all doors shall be hinged
               with removable hinge pins.
          5. Top and bottom conduit areas shall be clearly indicated on shop drawings.
       E. Nameplates: Provide 1 inch high x 3 inches engraved laminated (Gravoply) nameplates for
          each device. Furnish black letters on a white background for all voltages.
       F. Bus Composition: Shall be [plated copper] [plated aluminum]. Plating shall be applied
          continuously to all bus work. The switchboard bussing shall be of sufficient cross-sectional
          area to meet UL Standard 891 temperature rise requirements. The phase [and neutral]
          through-bus shall have an ampacity as shown in the plans. For 4-wire systems, the neutral
          shall be of equivalent ampacity as the phase bus bar. Tapered bus is not acceptable. Full
          provisions for the addition of future sections shall be provided. Bussing shall include all
          necessary hardware to accommodate splicing for future additions.
       G. Ground Bus: Sized per NFPA70 and UL 891 Tables 25.1 and 25.2 and shall extend the entire
          length of the switchboard. Provisions for the addition of future sections shall be provided.
2.02A SWITCHBOARD - INCOMING MAIN SECTION DEVICES
       A. [Incoming Cable Lugs (Distribution only, non-service entrance) through 8000 A]
          1. Incoming conductors shall terminate at lug landing pads rated at [_______A].
          2. All lugs shall be UL Listed to accept solid and/or stranded [copper and aluminum
               conductors] [copper conductors only]. Lugs shall be suitable for [75° C rated wire] [90°
               C rated wire, sized according to the 75° C temperature rating in the NEC].
          3. Provide [mechanical type] [compression type] lugs to accommodate the conductor shown
               on the associated drawings.
2.02B SWITCHBOARD - DISTRIBUTION SECTION DEVICES
       A. Branch Fusible Devices
          (Select 1 or 2 or both)
          1. [Fusible switch]
               a. Group mounted, [30 through 600 A, Type QMJ] or [30 through 1200 A, Type
                    QMB].
                 b. Fusible switches shall be group mounted plug-on with mechanical restraint. No
                    additional hardware shall be required to mount the fusible switch into the
                    switchboard.
               c. Modular construction shall permit 30 through 1200A devices to be field installed by
                    the Contractor due to a project change order or to accommodate future expansion.
               d. Line side fusible switch connections are to be jaw type construction.
               e. The operating mechanism shall be spring driven, with quick-make, quick-break
                    action. Operating handles shall be flange mounted as an integral part in the
                    operating mechanism. Switch contact shall be knife-blade and jaw construction.
                    Switch shall include visible blades as a positive blade status indicator.
               f. Switches shall be secured to the bus with spring reinforced jaw assemblies. In the
                    event of a short circuit condition, the increased magnetic flux shall cause the jaws to
                    grip the bus more firmly.
               g. Fusible switch units shall be equipped with all required mounting brackets and
                    guides.
               h. Switch shall have dual cover interlocks designed to prevent the opening of the cover
                    when the switch is ON. The cover interlock shall prevent the switch from being
                    turned ON with the cover open. Interlock may be manually overridden for testing
                    purposes. Switch cover shall include a means by which the cover can be padlocked
                    in the closed position. The operating handle shall feature positive lock-off means by
                    providing provisions for (3) .375 in padlocks.
               i. There shall be two forms of visible ON/OFF indication:
               j. A dual-color operating handle and a large steel ON/OFF nameplate with the O/I
                    international markings. The universal nameplate shall be readable regardless of the
                    switch orientation. Each nameplate shall furnish an easily removable circuit
                    directory card.
               k. Fusible switches shall be UL Listed when equipped with field installable accessories:
                    Compression lugs, copper mechanical lugs, and electrical interlocks.
               l. 30 through 100A fusible switches shall have fuse pullers provided. The fuse puller
                    design shall be of the type that the line side of the fuse is disconnected from the
                    switch before the load side of the fuse is removed.
               m. Fuse clips shall be designed to accommodate Class (Select one) [H] [J] [R] [T] fuses
                    for 30 through 600A. Class L fuses shall be used on all devices above 600 A.
               o. Fusible switches shall be rated through 1200A.
          2. [Fused power circuit devices]
               a. Individually fixed mounted bolted pressure switch(s) through 4000A.
               b. Each device shall have power terminals to accommodate either cable or bolted bus
                    connections.
2.03 METERING (CUSTOMER)
       A. Manufacturers:
          1. [Square D] Model [PM 650].
          2. [Square D] Model [CM 2350].
          3. [_______ ] Model [_________].
          4. Substitutions: substitutions shall be made only after proper verification
2.04 METERING TRANSFORMERS
       A. Manufacturer: Shall be Square D Company.
       B. Current Transformers: ANSI C57.13; 5 ampere secondary.
       C. Voltage Transformers: ANSI C57.13; 120 V single secondary. (Not required for type PM
          meters)
2.05 ACCESSORIES
       A. For switchboards installed outdoor only, provide thermostatically-controlled electric heaters
          in each section. [Provide terminals for separate source connection of heater power circuit.
          Voltage Rating: [120] [       ] V.] [Provide control power transformer with the total VA rating
          of the electric heaters in the switchboard.)
2.06 RELATED SECTIONS
       A. [Section 16290-3]- ELECTRICAL POWER MONITORING & COMMUNICATION
       B. [Section 16280-1] - TRANSIENT VOLTAGE SURGE SUPPRESSION DEVICES IN
          SWITCHBOARDS & SWITCHGEAR
       C. [Section 16415-1] - AUTOMATIC TRANSFER SWITCHES IN LOW VOLTAGE
          EQUIPMENT
                                     END OF SECTION

								
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