3M 2178 Instructions Manual
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3M 2178 Instructions Manual

3M 2178 Instructions Manual

Fiber optic splice case
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Instructions
2178 Fiber Optic Splice Case
Issue 3, March 1992

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Summary of Contents for 3M 2178

  • Page 1 Instructions 2178 Fiber Optic Splice Case Issue 3, March 1992...

  • Page 2: Table Of Contents

    2.0 Specifications ............................... 3 3.0 Kit Contents ..............................3 4.0 Cable/Splice/Kit Matrix ..........................6 SECTION 1: 2178 SPLICE CASE INSTRUCTIONS ..................... 9 5.0 Cable Preparation ............................9 6.0 Mid-Span Splice (Balloon Splice) ......................... 9 7.0 Bonding for Shielded Cable .......................... 11 8.0 Core Blocking ...............................

  • Page 3: General

    Telecom. One Universal Organizer Adapter is included with the splice case. For further information, see manufacturer's tray size specifications on page 3. The 2180 Cable Kit is used when the 2178 Fiber Optic Splice Case is reentered. All materials necessary for cable addition and splice case reassembly are included.
  • Page 4 3.02 2180 Contents Qty. Sealing Washer Tree Key, Hex (Allen Wrench) Green Cable TY Blue Cable TY Clamp (Hose, .439/1.00) Sealing Cord Sealing Tape 3.03 2181 Contents Qty. Spacer Assembly Spacer Clamp Assembly Sealing Washer Tree Sealing Plugs Bolts, 3.5" Green Cable TY Blue Cable TY Clamp (Hose, .439/1.00)
  • Page 5 3.05 2524-FT Splice Tray Qty. Tray Base Buffer Tube Tubing 1 Rl. Fusion Splice Holder Dual Lock 3/4" x 3" 3.06 2185 Core Block Kit Qty. 4445 Sealant (will core block 4 cables) 1 Bag Gloves 1 Pr. Foam Tape 2 Rls.

  • Page 6: Cable/Splice/Kit Matrix

    4.0 Cable/Splice/Kit Matrix 4.01 The matrix below shows the number of cables that can be placed into a splice case and the components that would be required to build a new splice. 2178 2181B # OF FIBER OPTIC 2180 CABLE...
  • Page 7 MAJOR BUTT IN-LINE # OF # OF 24 # OF FIBERS SPLICE FIBER TRAYS SPLICES COMPONENTS * SPLICE CABLES * 2178 2178 2178 2181 (1) 2178 2181 (1) 2178 2181 (1) 2178 2181 (1) 2178 2181 (2) 2181B (1)
  • Page 8 4.03 Tray Size Specifications: 2178 with a 2181 Number of Standard Maximum and No Cable Maximum 3.46" Space Fibrloks Numberof 4.96" Space Number of Available Tray Size per Tray Fibrloks Available Fibrloks 3M/Brand Rex 2118 9 trays 13 trays .375"...

  • Page 9: Section 1: 2178 Splice Case Instructions

    SECTION 1: 2178 SPLICE CASE INSTRUCTIONS 5.0 Cable Preparation Caution: When removing cable sheathing, do not cut, kink, or damage underlying layers. If damage occurs, cut back sheath components to adequately inspect and repair. 5.01 Remove 96" (2.43 m) of outer cable sheath (and shield or armor if present). Remove successive sheath layers and wrappings to expose primary tube(s) protecting fibers.
  • Page 10 6.03 Remove 48" (1.2 m) of cable sheath (and shield, if present) from either side of the reverse point (60" from mid-point for LXE). Remove inner sheath to within 1/2" (13 mm) of the outer sheath ring cut. Note: Removal of 48" (1.2 m) (60" for LXE) of outer cable sheath in both directions is required when the spliced fibers are not dedicated.

  • Page 11: Bonding For Shielded Cable

    7.0 Bonding for Shielded Cable Note: Use caution when installing shield bond connector so underlying layers of cable are not damaged. 7.01 When splicing any standard, terneplate type, shielded fiber optic cable, install the 4460-D Shield Bond Connector. 7.02 Prepare cable/tab 180 degrees from shield bond connector location and insert base. Note: When a non-core wrap fiber optic cable is being used, use caution to not damage buffer tubes when inserting connector base.

  • Page 12: Core Blocking

    7.06 When using steel reinforced crossply, and crossply with ribbon cable, install the 4460-D per practice and twist all reinforcing members together and bring to one side. 8.0 Core Blocking Note #1: This core blocking method is used on fiber cable design as of this practice issue date, except slotted core fiber cable.
  • Page 13 8.05 Cut corner of 4445 Sealant bag. Starting at opposite end, force sealant out and fill area between foam collars. Note: Carefully follow health, safety and disposal instructions as given on Material Safety Data Sheet or product label for 4445 Sealant. Note: Protective gloves should be worn during sealant dispensing and overwrapping steps.
  • Page 14 8.11 Overwrap with one additional half-lapped layer of vinyl tape. 8.12 Repeat steps 8.02 thru 8.11 until all cables are blocked. 8.13 Secure the cables to the splice case per splice case practice. 8.14 Armored Application Note: This procedure is the same for LXE, steel re-enforced crossply, crossply ribbon cable, loose buffer tube and steel central member make up fiber optic cable.
  • Page 15 8.18 Separate buffer tube(s), strength member and bond members. Build another collar between buffer tube(s), strength members and bonding strap so distance between collar outer edges is 5" (127 mm). Wrap two more layers of foam tape around outside of tubes. 5"...

  • Page 16: Sealing Washer Installation

    8.24 Overwrap entire block with one half-lapped layer of highly stretched 3/4" (19 mm) vinyl tape. 8.25 Apply a compression wrap with two half-lapped layers of highly stretched 3/4" (19 mm) DR tape. 8.26 Overwrap with one additional half-lapped layer of vinyl tape. 8.27 Follow steps 8.15 thru 8.26 until all cables are blocked.

  • Page 17: Grounding For Shielded Cable

    9.03 Press cable seals onto cable entrance port(s). 9.04 Attach each cable to splice case by installing and tightening hose clamps over previously wrapped DR Tape on the down brackets. Double sheath cable will have hose clamp tightened over metallic tape previously placed on the cable instead of DR Tape.
  • Page 18 10.04 Ground isolation from the central block using AT&T crossply or LXE cable. This method will provide ground isolation plus strain relief protection. a. The cables must enter the case in a butt configuration at the external ground stud end. Note: When terminating OFNR cable, ground isolation is not necessary.

  • Page 19: Buffer Tube And Ribbon Cable Preparation

    This is accomplished by having the fiber from one cable pass in front of the central clamp and follow the route of the other fiber. The 3M Fibrlok splice tray requires a counterclockwise direction. Follow supplied instructions with...

  • Page 20: Universal Organizer Adapter

    12.01 The universal organizer adapter is secured onto the studs located on the central clamp. Trays that will fit on the organizer adapter are the 3M Fibrlok Tray, AT&T, UC Series, Ditel, Preform, and Siecor. The bottom tray is secured to the adapter by the adhesive-backed dual-lok pads. Additional trays are added by attaching to the tray below or by using the supplied rod and wing nut.

  • Page 21: Splice Trays And Fiber Splicing

    13.0 Splice Trays and Fiber Splicing 13.01 2524-FT (Fusion and Fibrlok) The Fibrlok 2524 Splice Organizer Tray stores up to 24 Fibrlok splices and/or 24 fusion splices and the respective buffer tubes and fibers. A 4" (102 mm) minimum bend diameter is maintained in each tray.
  • Page 22 13.10 Slide a segment of tubing over the fibers until it contacts the buffer tube end. No more than twelve 250 µm fibers or four 900 µm fibers should be placed into a tube. 13.11 Slide the segment of tubing over the buffer tube about 1" (25 mm) and secure with two wraps of vinyl tape.
  • Page 23 13.15 To remove cover, unlatch and grasp either corner. Pull straight and rotate simultaneously until both hinges are disengaged. 13.16 Identify fibers to be spliced. 13.17 Lay the buffer tube ends over the channels. If tubes are too long to fit in channels, trim excess off. DO NOT CUT FIBERS. 13.18 Press the buffer tube into the channel to secure.
  • Page 24 13.23 Lay at least 1 1/2 loops of fiber from the first buffer tube of the second cable on the tray with the fiber ends crossing the back "CUT HERE" mark. 13.24 Now cut the fiber ends at the mark. Be sure to cut ONLY the fiber ends.
  • Page 25 13.30 Lay the splice on top of the pocket that it will snap into. Place the fibers around the perimeter of the tray under the tray tabs. If 900 micron fiber is being spliced to 250 micron fiber, place the 900 micron fiber into the tray before placing splice in position.

  • Page 26: Splice Preparation

    13.36 Now slide the tray laterally (flexing the lever arm outward) enough to allow the post to be inserted into the opposite lever arm hole. (Back view shown). 13.37 Lift the tray being added upwards approximately 1/2" (13 mm). Push in on the front snap of the installed tray and lower new tray down and over the snap.
  • Page 27 b. Lay two strips of sealing cord 1 1/2" (38 mm) in length between the cable entrance ports on each end of the splice case base, or one 3" (76 mm) length folded in half to fill the channel. 15.02 Seal plug construction: a.

  • Page 28: Racking In Building Entrances And Vaults

    Place a 1/2" (13 mm) bolt through racking that extends away from the wall. c. The bottom of the 2178 is placed on the bolt so the groove on the base fits around the bolt. d. Place a 1/2" (13 mm) bolt through the top groove to align with an opening.

  • Page 29: Splice Case Re-Entry

    17.0 Splice Case Re-entry 17.01 Loosen the 10 bolts holding splice case halves together. Bolts should be completely unthreaded from nut inserts in splice case base. 17.02 Using these bolts, loosely screw one bolt into each of the four threaded corner inserts in the splice case cover. 17.03 Beginning with any corner, screw in bolt until the splice case halves have been pried apart about 1/4"...

  • Page 30: Section 2: 2181 Cable Addition Kit

    SECTION 2: 2181 CABLE ADDITION KIT 18.0 Cable Addition Placement, Preparation and Installation (Butt Adapter) 18.01 Cables should be placed in cable entrance ports in a butt configuration for easier storage. 18.02 Cable preparation - (See Section 5.0). 18.03 Stack Central Clamps Note: Buffer tube retainers may be removed for installation of central clamp and additional trays.

  • Page 31: Splice Case Assembly With One Adapter

    20.0 Splice Case Assembly with One Adapter 20.01 Seal splice case walls: a. Lay sealing cord into channel along both sides of the splice case base. Do not stretch sealing cord. b. Lay two strips of sealing cord 1 1/2" (38 mm) in length between the cable entrance ports on each end of the splice case base, or one 3"...

  • Page 32: Cable Addition Placement, Preparation And Installation (Two Adapters)

    20.05 Tighten all bolts in numbered sequence. A torque wrench is not needed. If a torque wrench is used, do not exceed 20 Ft. Lbs. (240 in Lbs.). Note: Do not use an air drive wrench. 20.06 Follow steps 20.01 through 20.04 to seal butt adapter to cover. 20.07 After five minutes, retighten all bolts on the splice case.

  • Page 33: Butt Adapter 2 Installation

    21.05 Bonding for Shielded Cable - (See Section 7.0) 21.06 Core Blocking - (See Section 8.0). 21.07 Grounding for Shielded Cable - (See Section 10.0). 21.08 Follow instructions in Section 15.0 per adapter installed. 22.0 Butt Adapter 2 Installation 22.01 For the double butt adapter splice case, replace all ten 2" (51 mm) bolts inserted in the cover with the ten 5"...

  • Page 34: Splice Case Re-Entry With Butt Adapters

    23.04 Set cover directly over butt adapter 2. 23.05 Tighten all bolts in numbered sequence. A torque wrench is not needed. If a torque wrench is used, do not exceed 20 Ft. Lbs. (240 in Lbs.). Note: Do not use an air drive wrench. 23.06 Follow steps 23.01 through 23.04 to seal butt adapter.
  • Page 35 24.06 Remove the four corner inserts on exposed side of butt adapter by prying out with a screwdriver. Note: Do not discard corner inserts. Inserts must be replaced in butt adapter before reassembly. 24.07 Loosely screw one bolt into each of the four threaded corner inserts of the butt adapter. The threaded corner inserts are located directly beneath the previously removed corner inserts.
  • Page 36 NOT LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE. 34-7029-6387-6 1992 3M Litho in U.S.A. 3M Telecom Systems Group 6801 River Place Blvd. Austin, TX 78726-9000...

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