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Cable Preparation and PullingProcedure Best Practices for

Fiber Optic Indoor Tight-Buffered Cable

Panduit Corp. 2009 BEST PRACTICES PN447B

For Technical Support: www.panduit.com/resources/install_maintain.asp

Page 1 of 17

\

Table of Contents

3

2.0 Preparation Notes Tools and Material Tools and Materials ......................................... 33.0 Pulling Procedure ........................................................................................................... 3

4.0 Interconnect Cable Preparation ...................................................................................... 7

4.1 Duplex Cable Preparation............................................................................................... 7

4.2 Simplex Cable Preparation ............................................................................................. 9

5.0 Distribution Cable ( 24 fibers) Preparation .................................................................. 10

5.1 Jacket Preparation ........................................................................................................ 10

6.0 Distribution Cable (> 24 fibers) Preparation .................................................................. 12

6.1 Jacket Preparation ........................................................................................................ 12

6.2 Unit Preparation ............................................................................................................ 157.0 Fiber Preparation .......................................................................................................... 17

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Page 2 of 17

DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITIES

The practices contained herein are designed as a guide for use by persons having technical skill at their owndiscretion and risk. The recommended practices are based on average conditions. Panduit does notguarantee any favorable results or assume any liability in connection with this document.

In addition, the materials and hardware referenced herein appear as examples, but in no way reflect the onlytools and materials available to perform these installations.

Local, State, Federal and Industry Codes and Regulations, as well as manufacturers requirements, must beconsulted before proceeding with any project. Panduit makes no representations of, nor assumes anyresponsibility for, the accuracy or completeness of this document. Panduit disclaims any liability arising fromany information contained herein or for the absence of same.

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Page 3 of 17

1.0 General Information

This instruction manual is a step-by-step guide for endand termination of tight-buffered cable, including sheathremoval, core preparation, and fiber preparation. Localcompany practices and specifications may be in placeconcerning cable access and how it relates to a specific

product or application. Modifications that do not exceedthe cables optical and mechanical performancespecifications may be made to accommodate localcompany practices and specifications. Thesemodifications should be made at the discretion of localcompany users.

Step-by-step illustrations have been providedfor your reference and orientation as you followthe procedures.

2.0 Preparation Notes

Gather the tools and materials to be used for thejob and make sure they are approved by yourcompany for use in the field and are in goodworking order.

Record for future reference the cableidentification markings, which consist of sheathnumber, footage, and cable description codesprinted on the cable outer sheath.

3.0 Pulling Procedure

Tools and Materials

1. Eye and Hand Protection

2. Linesmen Pliers

3. Tight Buffer Stripping Tool

4. Wire Stripping Tool

5. Scissors/Snips

6. Sheath Knife

7. Scissors/Snips

8. Needle Nose Pliers

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Page 5 of 17

4. Pulling Grip Selection and Installation

4.1 Prior to installation, the proper size gripmust be chosen for the cable to be pulled.

Grip selection is based on the outside diameterof the cable (Figures 2 and 3)

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Cross section of a 48-fiberUnitized Cable

4.3 Once the proper grip is obtained, inspect it fordamage broken wires, bulges due to stress, rust, etc.

Grasp the pulling eye in one hand (gloves arerecommended) and smooth out the mesh with theother, tightening the wires. Figure 4 illustrates thetechnique, which is critical when reusing grips.

4.2 Generally speaking, use the smallest grip which willfit over the cables outer jacket without excessive difficulty.

Measure the cable diameter and determine the proper gripby locating the diameter in Table 1.

Figure 4

4.4 To ease installation, trim the end of the cable with sidcutters to remove any protruding buffered fibers, yarn, ocentral member (Figure 5)

Figure 5

4.5 It is necessary to remove a section of outer jaequal to half of the length of the mesh area of the Mark this distance from the end of the cable witpermanent marker (Figure 6)

Figure 6

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Page 6 of 17

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Page 7 of 17

4.0 Interconnect Cable

This procedure is intended to be used withinterconnect cables, including both duplexand simplex cable designs. Two simplexcables comprise a single duplex cable.

The length of cable sheath to be removedwill depend on local company practices andspecifications. Designate this distancefrom the end of the cable on the outersheath.

4.1 Duplex Cable Preparation

There are two types of duplex cables.

Sheathed Duplex

Enclosing two simplex cables in an outersheath created a duplex cable. To preparethis type of cable, with a sheath knife, cutthe outer jacket at the designated distance.

Gently flex the cable at the ring cut toseparate or removal.

Remove and discard the sheath section.No more than eight inches of sheath shouldbe removed at once. Therefore, eight-inchsections must be removed until the finaldesired length is achieved.

With the outer sheath the two internalsimplex cables are not exposed. At thispoint advance to Section 4.2 for simplexcable preparation procedures.

Duplex and simplex cables

Ringing a sheathed cable outer jacket with a sheath knife.

Flexing the sheathed cable at the ring cut

Removing the outer section of the jacket

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Page 8 of 17

Zip-cord Duplex Cables

Two simplex cables joined via aconnecting membrane create a duplexcable. This type of duplex cable isreferred to as zip-cord.

To prepare a zip-cord style duplexcable, use an approved sheath knife tocarefully separate the duplex cable intotwo simplex cables. Cut the membraneconnecting the two simplex cables.Approximately one inch is sufficient.

Firmly grasp the two separated simplexcables and pull them apart. Theyshould separate easily.

Separate the duplex cable into twosimplex cables for the distancedesignated by local splicing/terminationguidelines and vendor specifications.

At this point, advance to Section 4.2 forSimplex Cable Preparation procedures.

Cutting the membrane connecting the two cables

Carefully separating the two cables by pulling them apart

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Page 9 of 17

Cutting the simplex jacket to expose the tight-buffered fiber

Cutting the strength member yarns

4.2 Simplex Cable Preparation

The length of sheath to be removed fromeach simplex cable will be determined bylocal splicing/termination guidelines andvendor specifications.

The manufacturer of the connector typebeing installed specifies the correct removallength for each cable component.Information similar to the followingillustration should be provided with theconnector.

Using an approved set of strippers that donot come close to a diameter small enoughto damage the fiber, select one simplexcable and cut the jacket at the length asspecified by the connector manufacturer.

Remove the length of outer jacket. This willexpose the tight-buffered fiber and thestrength member yarn. Separate thestrength member yarn from the tight-buffered fiber.

Cut off the strength members leaving thelength specified by the connectormanufacturer.

At this point advance to Section 7.0 for Fiber

Preparation procedures.

Simplex cable

Removing the outer length of the simplex jacket

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Page 10 of 17

5.0 Distribution Cable (24 Fibers orless Preparation)

This procedure is intended for use withdistribution cable with 24 or fewer tight-buffered fibers. The 24-fiber design consistsof a core of 12 tight-buffered fibers aroundan upjacketed central strength member.Stranded around this core are 12 morefibers with filler units to complete the layer.Strength member yarns and a jacket coverthe core.

The 12-fiber design is similar to the 24-fiberdesign without the outer layer of fibers. Forthese procedures the 24-fiber design will beshown. The sheath removal for the 12-fiberdesign is identical with the exception of theouter core layer of fibers.

5.1 Jacket Preparation

The length of cable sheath to be removedwill depend on local company practices andvendor specifications. If not otherwisespecified, six feet should be sufficient.Designate this distance from the end of thecable on the outer sheath. Using anapproved sheath knife, ring thecircumference of the jacket at thedesignated distance.

Using a sheath knife, ring thecircumference of the jacket about six to eightinches from the end of the cable.

Gently flex the cable at the cut to separatefor removal.

The end piece of the jacket can be removedand discarded. This will expose the strengthmember yarns and ripcord.

Ringing the cable with a sheath knife

Flexing the cable at the ring cut to separate sheath sections

Removing the outer cable sheath section

Exposing the ripcord

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Page 11 of 17

Grasp and wrap the ripcord around theneedle-nose pliers.

Pull the ripcord back to the firstpredetermined ring cut.

Carefully separate the strength memberyarns from the core and cit to the lengthprescribed by local practices and vendorspecifications.

At this point advance to Section 7.0 for FiberPreparation procedures.

Grasping the ripcord with needle nose pliers

Pulling the ripcord to the predetermined ring cut

Removing the split cable sheath


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Page 12 of 17

6.0 Distribution Cable (Greater than24 Fibers) Preparation

This procedure is intended for use withdistribution cable with more than 24 fibers.The 72-fiber version of this design is usedhere for demonstration purposes. Theprocedure explained here will work with allother distribution cable with more than 24fibers.

The 72-fiber cable consists of six jacketedunites stranded around an upjacketed CSM.There is tape and a jacket round each unit.Around the core of the six units are strandedstrength member yarns on top of which theouter jacket is applied.

6.1 Jacket Preparation

The length of cable sheath to be removedwill depend on local company practices andvendor specifications. Designate thisdistance from the end of the cable on theouter sheath.

Using the approved sheath knife, ring thecircumference of the outer jacket at thedesignated distance.

Using the sheath knife, ring the

circumference of the outer jacket about sixto eight inches from the end of the cable.

The end piece of jacket can be removed anddiscarded. This will expose the strengthmember yarns and ripcord.

Ringing the cable sheath with a sheath knife

Flexing the cable at ring cut to separate sheath sections

Exposing the ripcord after removal of jacket end piece

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Page 13 of 17


Pull the ripcord back to the firstpredetermined ring cut.

If a ripcord is not provided carefully slit theouter jacket to the predetermined ring cutusing a sheath knife.

Remove this length of the jacket and discardit.

Separate the strength member yarns from thecore and cut to the length prescribed by localcompany practices and vendor specifications.

Grasping the ripcord with needle-nose pliers and pulling backto predetermined ring cut

Removing the split cable sheath


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Page 14 of 17

The core of the six jacketed units iswrapped with a clear tape. This tape cannow be unwrapped and discarded. This willexpose the individual jacketedunits for preparation.

The six jacketed units are stranded aroundthe CSM. Unwind the units to expose theCSM.

Using approved cutters cut the CSM to the

desired length for termination. Unwinding the clear tape

Exposing the central strength member

Cutting the central strength member

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Page 15 of 17

6.2 Unit Preparation

The length of unit jacket to be removed willdepend on local company practices andvendor specification. It is important to usecare to avoid damaging the tight-buffered

fibers in the core of the unit and also toavoid cutting the ripcord.

Using the sheath knife gently ring thecircumference of the unit jacket about four tosix inches from the end of the unit. Again, itis very important to use care to avoiddamaging the tight-buffered fibers in thecore of the unit and also to avoid cutting theripcord.

Gently flex the unit at the cut to separate forremoval.

The end piece of unit jacket can be removedand discarded. This will expose the ripcordand the clear tape wrapped around the core.

Cut the outer strength members

Flexing the unit of the ring cut to separate jacket sections

Removing the end piece of the unit jacket

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Page 16 of 17


Pull the ripcord back to the predeterminedlength. This will depend on local company

practices and vendor specifications. Peelthe jacket away to this point.

Using the approved snips or scissors cut thislength of jacket away. Use care to avoidcutting any of the tight-buffered fibers.

The units tight-buffered fibers aresurrounded with strength member yarns.Carefully separate the tight-buffered fibersfrom the strength member yarns.

Using approved snips or scissors cut the

strength member yarns to the desired lengthfor termination.

At this point advance to Section 7.0 for fiberPreparation procedures.

Exposing the ripcord

Grasping and pulling the ripcord with needle-nose pliers

Peeling off the unit jacket

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For Instructions in Local Languagesand Technical Support:

www.panduit.com/resources/install_maintain.asp www.panduit.com

E-mail:[email protected]

Fax:(708) 444-6993

7.0 Fiber Preparation

Using an approved stripping tool that scoresthe 900m diameter tight-buffered coating,but does not touch the 125m diameter ofthe fiber, remove the tight-buffered coating.

For best results, strip and remove twoinches or less at a time. When strippingeither the tight-buffered coating or the fiberscoating, hold the fiber carefully to avoid tightbends, while placing the fiber under tension.Small bend diameters and abrupt highstress can damage or break the fiber.

With the fibers now exposed and accessiblefor termination refer to localsplicing/termination guidelines and vendorspecification.

Refer back to Section 4.2 Simplex CablePreparation for an example of manufacturersupplied connector termination instructions.

Removing the tight buffering

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