3M 4604 User manual

June 1998
34-7045-6337-7-A
Re-enterable PST Dome Closure
Instructions

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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

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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)
(C) (E)
(F)

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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
TM
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
6"
(151 mm)
23"
(584 mm)
Scuff Both
Cables
Remove Sheath
Preparation A Preparation B
6"
(151 mm)
15"
(381 mm)
Scuff Both
Cables
Remove Sheath
3.1 Overall closure dimensions (See PST Closure Capacity Chart). WD
H

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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.

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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.

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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.

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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.

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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.
1
2
3
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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8.11 Remove cardboard insert and pull core tail through the center of
PST until core is even with PST edge.
8.10 Place base plate as illustrated between the cables on top of the
end seal with the outside ribs facing upward.
Note: In order to fit 600 pair or larger cable, it may be necessary
to pull the cables together with tape or cable ties.
8.9 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 Data Sheet
for desiccant bag.
8.6 Remove packaging from gel sealant strip.
8.7 Wrap the gel sealant strip around the core and ground wraps with
a slight tension.
8.8 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.
Ribs

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8.16 Continuously push PST downward while pulling the rest of the
core material.
8.18 For pedestal closure applications, secure the closure to pedestal,
mount terminal block and connect ground wires according to
system practice.
8.17 When the PST is in place, remove the core wrap from around the
cable.
8.12 Slide PST over closure so that the PST tail is pointed toward the
top of the closure. The core tail MUST be unwound upward.
Position PST bottom edge within 0.5" (13 mm) of the bottom of the
base.
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.
8.13 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 2.0"
(51 mm) of the PST is shrunk onto the closure.
8.14 Place assembly over splice and onto gel end seal. Insure the
wireform latch and the 3M logo are facing forward. Mate the plate
with the base.
8.15 Push PST towards bottom of closure. This will invert the PST.

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10.0 Retrofit on PST Pedestal Splice Closures
10.1 Existing 3M™PST Pedestal Splice Closures can be converted
to re-enterable closures by using the following procedures.
Cut PST from top to bottom and pull it away from the closure
body and sealing collar.
10.2 Remove vinyl tape from butt of closure and slide closure off.
9.0 Closure Reentry
9.1 Re-entry of closure is accomplished by pulling out and pushing
down the wire form latch. The latch will lift the dome of the
closure from the base as it is pulled.
Note: Replace desiccant bag if necessary. Replacement bags
can be obtained from 3M, order #78-8054-9675-5.
9.2 To replace the closure dome, PLACE dome on to the base. Close
the wire form latch, insuring that it catches the protrusions on the
dome.
Note: Wipe O-Ring clean if dirty and relubricate. Cable grease is
acceptable.

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10.3 Remove vinyl tape from foil bag and slide foil bag off splice.
Note: The foil bag is not required in the reenterable dome
closure.
10.4 After completing repair, take gel sealing strip and remove the
packaging.
Note: For 4608 and 4608XL use gel sealant strip only.
Wrap the gel sealing strip around the existing mastic end seal.
Place new dome closure on the seal.
10.5 If more than one wrap of gel is visible, trim the strip, and
rewrap. Repeat until only one wrap of gel is visible. A
4600GSS gel sealant strip may be necessary to build the seal
to the proper size.
10.6 Wrap vinyl tape that is less than 1" (25 mm) wide around seal
to hold tail in place, if necessary.
Note: Do not completely cover the outside surface of the seal
with tape.
Note: For 4608 and 4608XL, base plate is not required.
10.7 Complete assembly as outlined in the installation procedures.

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Important Notice
All statements, technical information and recommendations related to the Seller's products are based on information believed to be
reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability
of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use.
Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect
unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all
warranties, expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose
which warranties are hereby expressly disclaimed.
SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT
LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS.
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