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January 2006

78-8135-4353-1-A

Better Buried Closures

Instructions

Summary of content (8 pages)

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Better Buried Closures Instructions January 2006 78-8135-4353-1-A
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Contents: 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 General ......................................................................................................................................................... 3 Kit Contents .................................................................................................................................................. 3 Closure Selection Guide ...................................................................................................................
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1.0 General 1.1 The 3M™ Better Buried Closures are rigid body splice closures designed for direct burial. When ﬁlled with a reenterable encapsulating compound, the closure can be reentered for splice rework. 2.0 Kit Contents 2.1 The kit contents are shown below: Snap-in Caps Closure Body Double End Cap Strain Relief Bars Large Hose Clamps Single End Cap Funnel Locking "H" Insulating Sleeves Small Hose Clamps Foam Strips 883656 Visually inspect all components.
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2.3 Additonal Materials Required (Dependent on Kit Contents): • Shield Connectors • Encapsulating Compound (permanent or reenterable) • 3M™ Scotchcast™ Spacer Web 4430 (for reentry only) • Sheath Scuff Material • Pair Saver • 3M™ Scotchcast Strain Relief Bar Kits 4465 or 4465-L • Moisture Resistant Splicing Connectors • Better Buried End Caps (bulk) 3.0 Closure Selection Guide 3.1 Select proper closure using the following tables. 3.
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4.0 LHS End Cap Installation 5.0 Cable Preparations 4.1 End Cap Installation on Cut Cables Procedure: 5.1 Position and secure cables according to the splice opening for the closure size selected. See closure dimension guide for the maximum splice openings. 5.2 Scuff 6" (152 mm) of outer sheaths as shown. 5.3 Wrap all scuffed areas with vinyl tape. a. Select desired port(s). b. Cut off cone(s) as close as possible to the diameter of the cable using the cut guides on either side of the cone(s).
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f. Insert base assemblies of the shield connectors between the inner sheath and the shield, 180° apart. Insert base assemblies of shield connectors between the core wrapper and the shield 180° apart. Install first nut and torque to 45 ± 5 in-lbs 3" – 9" Kits Strain Relief Bar 2" Kit Strain Relief Bar Bonding Braid (5.2 ± 0.6 kg·m). 883657 e. Splice conductors per standard procedure. 180° f. To insure thorough encapsulation of conductors, do not tightly bind the splice bundle.
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o. Install second bond bar if required. p. Install hose clamps over ends of strain relief bars. Note: Rotate hose clamps so heads will not obstruct ﬁll ports on body. 1/2" 13mm q. Overwrap the strain relief hose clamps with DR tape to prevent hose clamp tails from ﬂagging. 6.7 r. Build outer sheath sealing collars just beyond ends of strain relief bars. Outer sheath sealing collars are one (1) wrap of 3/4" (19 mm) B sealing tape completely overwrapped with highly stretched DR tape (white side out).
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.0 Closure Extension 8.1 Cut a closure body in half using a cable saw or similar tool. Cut grooves are provided on closure bodies. 8.2 Assemble the closure by staggering the cut sections. Position hose clamps. Tape seams with LR tape or vinyl tape. Half Body Top 9.2 Full Body Bottom 883661 9.3 Full Body Top Half Body Bottom 75350 8.3 Fill closure with compound as outlined in Sections 6.4 - 6.11. 9.0 Adding Service Wires (2" - 5", 50mm - 125mm Closures) 9.