3M 4604 Manuale utente

June 1998

34-7045-6337-7-A

Re-enterable PST Dome Closure

Instructions

Contents:

1.0 General.......................................................................................................................................................... 4

2.0 Kit Contents ................................................................................................................................................... 4

3.0 PST Closure Capacity ................................................................................................................................... 5

4.0 Cable Preparation ......................................................................................................................................... 5

5.0 Bonding and Grounding ................................................................................................................................ 6

6.0 Splicing .......................................................................................................................................................... 6

7.0 4604 and 4606 Closure Installation .............................................................................................................. 7

8.0 4608 and 4608XL Closure Installation .......................................................................................................... 10

9.0 Closure Re-entry ........................................................................................................................................... 13

10.0 Retrofit on PST Pedestal Splice Closures .................................................................................................... 13

1.0 General

The 3M™Re-enterable PST Dome Closure is used for new and existing above-ground splices contained

within a pedestal.

2.0 Kit Contents

2.1 Additional Materials Required

Vinyl Tape

Shield Bond Connectors

Splice Connectors

Note: All components must be installed per instructions to be effective.

4608 and 4608XL Closures

Closure Assembly (A)

Dome

Base

O-ring

Latch

Gel End Seal Core (B)

Gel Sealant Strip (C)

PST (D)

Ground Wires (E)

Desiccant Bag (F)

Sheath Scuff (G)

Base Plate (H)

4604 and 4606 Closures

Closure Assembly (A)

Dome

Base

O-ring

Latch

Gel End Seal Core (B)

Gel Sealing Strip (C)

PST (D)

Ground Wires (E)

Desiccant Bag (F)

Sheath Scuff (G)

(D)

(G)

(H)

(F)

(B)

(C)

(E)

(A)

(D)

(A)

(B)

(G)

(F)

3.0 PST Closure Capacity

(W x D)

(H)

Closure

Outside Dim.

22.5"

(572 mm)

Closure

Height

Approx. Bundle

Diameter

Minimum Reliable

CAD Pedestal

Main

Cables

Terminal

Cables

Branch

Cables

Drop

Cables

*Approx.

Splice Range

2.5"

(64 mm) 3.9"

(99 mm)

0.4" - 0.6"

(10 - 15 mm) 0.4" - 0.6"

(10 - 15 mm)

0.7" -1.0"

(18 - 25 mm)

100 pr. - MS2

50 pr. - UR 300 pr. - MS2

100 pr. - UR

4604 4606 4608 4608XL

3.8" x 2.8"

(97 x 71 mm) 5.6" x 3.9"

(142 x 99 mm)

0.35" max

(9 mm) max

2 max

0.35" max

(9 mm) max

2 max

0.35" max

(9 mm) max

2 max

0.35" max

(9 mm) max

2 max

7.0" x 5.4"

(178 x 137 mm) 7.0" x 5.4"

(178 x 137 mm)

22.5"

(572 mm) 23.5"

(597 mm) 33.5"

(851 mm)

5.3"

(135 mm) 5.3"

(135 mm)

46 8 12/70

0.5" - 1.1"

(13 - 28 mm) 0.9" - 1.6"

(23 - 41mm) 1.4" - 2.5"

(36 - 64 mm) 1.4" - 2.5"

(36 - 64 mm)

0.4" - 0.8"

(10 - 20 mm) 0.4" - 0.8"

(10 - 20 mm)

0.9" - 1.3"

(23 - 33 mm) 0.9" - 1.3"

(23 - 33 mm)

600 pr. - MS2

300 pr. - UR 900 pr. - MS2

400 pr. - UR

*Note: Based on two bank 4000-DWP and Scotchlok

connectors installed per 3M practices.

Examples: 100 pair means 100 pair In and 100 pair Out or 100 pair straight splice.

4.0 Cable Preparation

4.1 Remove sheath and scuff both

cables as noted for the following

closure sizes.

Preparation A: 4604, 4606, 4608

Preparation B: 4608XL

(151 mm)

23"

(584 mm)

Scuff Both

Cables

Remove Sheath

Preparation A Preparation B

(151 mm)

15"

(381 mm)

Scuff Both

Cables

Remove Sheath

3.1 Overall closure dimensions (See PST Closure Capacity Chart). WD

5.1 Install bonding connectors per system practice. Bonds

should be placed so that the studs of the connectors are

facing forward.

5.0 Bonding and Grounding

6.0 Splicing

6.1 Splice per company practice.

6.2 Splice in tail of a terminal block when required.

5.3 Insulate bonding connectors by wrapping with vinyl tape.

5.2 Install external ground wires to bonding connector studs

and run along the cables.

Note: Place ground wires and drop wires between layers in gel

sealing strip. Ensure wires have one layer of gel between

them and cable sheath. There should be at least 0.25" (6

mm) between wires.

7.3 Install gel end seal core 2" (51 mm) below the sheath opening.

Pull lips of seal, created by cutting and removing plug, around

cables. Remove packaging from gel sealing strip. Wrap the gel

sealing strip around the core and ground wires with a slight

tension.

7.2 Slit gel end seal ports along the length of plugs for desired

number of cables to be installed and remove plugs.

Use plugs 1 and 2 for main cables and plug 3 for branch or

terminal cable.

7.0 4604 and 4606 Closure Installation

7.1 Cut and remove packaging from gel end seal core.

Note: A fourth plug is available on 4606 closure.

7.4 Squeeze gel end seal to insure a seal between layers and cables.

Note: Closure assembly must rest on end seal when placed over

the splice. Move end seal upward, if necessary.

7.5 Cut off top of foil bag which contains desiccant at dotted line and

secure bag at base of wire work area with a cable tie.

Note: Carefully follow health, safety and environmental

information given on product label or Material Safety Data

Sheet for desiccant bag.

7.6 Remove cardboard insert and pull core tail through the center of PST

until core is even with PST edge.

7.7 Slide PST over closure so that PST tail is pointed toward the top

of the closure. The core tail MUST be unwound upward.

Position PST bottom edge between the bottom of the wire form

latch and the base's top rib.

Note: Optional method is to put closure over the splice bundle

and position PST 2" (51 mm) below the gel end seal.

While holding the PST and closure with one hand,

unwind the core by pulling on the core tail with the other

hand in an upward and outward COUNTERCLOCKWISE

direction.

7.12 Continuously push PST downward while pulling the rest of the

core material.

7.14 For pedestal closure applications, secure the closure to pedestal,

mount terminal block and connect ground wires according to

system practice.

7.13 When the PST is in place, remove the core wrap from around the

cable.

7.9 Push PST towards bottom of closure. This will invert the PST.

Note: Do not force the PST to slide on the closure during inversion.

7.08 While holding the PST and closure with one hand, unwind the core

by pulling on the core tail with the other hand in an upward and

outward COUNTERCLOCKWISE direction until approximately

0.5"(13 mm) of the PST is shrunk onto the closure.

7.11 Place assembly over splice and onto gel end seal. Insure the

wireform latch and the 3M logo are facing forward.

7.10 Pull the core material from the PST until the PST is even with

the bottom of the closure.

8.0 4608 and 4608XL Closure Installation

8.1 Cut and remove packaging from gel end seal core.

8.3 Install gel end seal core 2" (51 mm) below the sheath opening.

Pull lips of seal, created by cutting and removing plug, around

cables.

8.5 Remove packaging from small cut gel sealant strip and wrap each

ground wire with the gel piece and press against core.

8.4 Cut a 1" (25 mm) piece from both ends of gel sealant strip to be

used on ground wires.

8.2 Slit gel end seal ports along the length of plugs for desired

number of cables to be installed. Remove plugs.

Use plugs 1 and 2 for main cables and plugs 3 and 4 for branch or

terminal cables.

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