3M Clock Radio 78 8135 4353 1 A User Manual

Better Buried Closures  
Instructions  
January 2006  
78-8135-4353-1-A  
 
1.0 General  
1.1  
The 3MBetter 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:  
uble End Cap  
e Hose Clamps  
Single End Cap  
Funnel  
883656  
Visually inspect all components. If any component is missing or appears damaged, do not install and call 3M  
Customer Service at 1-800-426-8688 for a replacement product.  
2.2  
The following materials are included in each 3MBetter Buried Closure Kit:  
B.B.  
B.B.  
B.B.  
B.B.  
B.B.  
SB/2SC  
SB/SC,DC  
SB/2DC  
SB/DC,TC  
Sleeve Kit  
Kit Components  
2" - 5"  
2" - 5"  
6" - 9"  
7" - 9"  
2" - 9"  
(50mm-127mm)  
(50mm-127mm)  
(152mm-229mm)  
(178mm-229mm)  
(50mm-229mm)  
Closure Body  
1
2
1
1
1
1
End Cap, Single (SC)  
End Cap, Multiple (DC) (TC)  
Spacer Web (SW)  
Strain Relief Bar (SB)  
Hose Clamps, Closure  
Hose Clamps, Strain Bar  
Funnel  
1
1
2
1
2
3
2
1
2
4
1
2
1
2
3
2
1
2
5
1
1
1
1
3
1 or 2  
1 or 2  
3
2
1
2
2
1
3
2
1
2
1
2
Snap-In Cap  
Locking "H"  
3 or 4  
1
Foam Strips  
3
 
2.3  
Additonal Materials Required (Dependent on Kit Contents):  
• Shield Connectors  
• Better Buried Sleeve Kits (Closure Extension)  
• Hose Clamps  
• Encapsulating Compound (permanent or  
reenterable)  
• Vinyl Tape  
• 3MScotchcastSpacer Web 4430 (for reentry only) • DR Tape  
• Sheath Scuff Material  
• Pair Saver  
• Scotch® Linerless Rubber Splicing Tape 130C  
• Scotch® Vinyl Mastic Tape  
• 3MScotchcast Strain Relief Bar Kits 4465 or 4465-L • B Sealing Tape  
• Moisture Resistant Splicing Connectors  
• Better Buried End Caps (bulk)  
• Bonding Braid  
3.0 Closure Selection Guide  
3.1  
Select proper closure using the following tables.  
3.2  
Maximum Splice Bundle Capacities (Straight Splice)  
Connector  
2" x 12"  
2" x 24"  
3"x 24"  
4" x 24"  
5" x 26"  
6 x 26"  
7 x 26"  
9 x 26"  
50 x 305mm  
50 x 610mm  
76 x 610mm  
102 x 610mm  
127 x 660mm  
152 x 660mm  
178 x 660mm  
229 x 660mm  
3MMS2™  
Splicing Module  
4000-DWP  
50 pair  
0.5 mm  
(24 AWG)  
UY Only  
100 pair  
0.5 mm  
(24 AWG)  
200 pair  
0.5 mm  
(24 AWG)  
400 pair  
0.5 mm  
(24 AWG)  
600 pair  
0.5 mm  
(24 AWG)  
900 pair  
0.5 mm  
(24 AWG)  
1200 pair  
0.5 mm  
(24 AWG)  
2400 pair  
0.4 mm  
(24 AWG)  
3MScotchlok™  
Connectors UR  
(w/ 3" pigtails)  
25 pair  
0.6 mm  
(22 AWG)  
50 pair  
0.6 mm  
(22 AWG)  
100 pair  
0.6 mm  
(22 AWG)  
200 pair  
0.6 mm  
(22 AWG)  
300 pair  
0.6 mm  
(22 AWG)  
400 pair  
0.6 mm  
(22 AWG)  
600 pair  
0.6 mm  
(22 AWG)  
900 pair  
0.6 mm  
(22 AWG)  
3.3  
Closure Dimension Guide  
Closure End Cap Port Diameters  
Maximum Splice Openings  
Approx.  
Amount  
Single  
Entry  
(Max.)  
Multiple Entry (Max.)  
Double Sheath  
of Comp.  
Required  
(Ave. Splice)  
Single  
Sheath  
Closure Size  
1
2
3
-
Outer  
-
Inner  
-
2" x 12"  
1.2"  
30 mm  
1.2"  
30 mm  
0.7"  
18 mm  
5"  
21 oz.  
600 gms  
(50 x 305 mm)  
127 mm  
2" x 24"  
1.2"  
1.2"  
0.7"  
-
-
-
-
17"  
17"  
14"  
42 oz.  
(50 x 610 mm)  
30 mm  
30 mm  
18 mm  
432 mm  
432 mm  
356 mm  
1200 gms  
3" x 24"  
1.6"  
41 mm  
1.6"  
41 mm  
1.0"  
25 mm  
17"  
432 mm  
17"  
432 mm  
14"  
356 mm  
106 oz.  
3000 gms  
(76 x 610 mm)  
4" x 24"  
2.0"  
51 mm  
2.0"  
51 mm  
1.5"  
38 mm  
17"  
432 mm  
17"  
432 mm  
14"  
356 mm  
159 oz.  
4500 gms  
(102 x 610 mm)  
5" x 26"  
2.4"  
61 mm  
2.4"  
61 mm  
1.8"  
46 mm  
19"  
483 mm  
19"  
483 mm  
16"  
406 mm  
254 oz.  
7200 gms  
(127 x 660 mm)  
6" x 26"  
3.3"  
84 mm  
2.7"  
68 mm  
2.0"  
50 mm  
1.5  
40 mm  
19"  
483 mm  
19"  
483 mm  
16"  
406 mm  
441 oz.  
12500 gms  
(152 x 660 mm)  
7" x 26"  
3.5"  
89 mm  
3.5"  
89 mm  
2.2"  
56 mm  
2.2  
56 mm  
19"  
483 mm  
19"  
483 mm  
16"  
406 mm  
530 oz.  
15000 gms  
(178 x 660 mm)  
9" x 26"  
4.0"  
102 mm  
4.0"  
102 mm  
2.5"  
64 mm  
2.5  
64 mm  
19"  
483 mm  
19"  
483 mm  
16"  
406 mm  
742 oz.  
21000 gms  
(229 x 660 mm)  
Note: All metric conversions are approximate.  
4
 
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.  
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). See cable  
diameter tape on back cover.  
5.2  
Scuff 6" (152 mm) of outer sheaths as shown.  
Wrap all scuffed areas with vinyl tape.  
5.3  
Note:  
Vinyl tape should be removed from under  
Shield Bond Connectors when installed.  
5.4  
Remove outer sheath for a splice opening no  
greater than the maximum splice opening  
listed for closure size in closure dimension  
guide.  
English Designation  
Metric Designation  
842844  
5.5  
5.6  
Remove shield flush with outer sheath.  
c. When not slitting cap, place piece of foam  
in each slot on inside of cap.  
Clean filled cable for good encapsulant  
adhesion and sealing.  
5.7  
Single Sheath Cables Procedure:  
6" (152mm) Scuff  
88T  
Foam Tape  
883656  
6" (152mm) Scuffed  
and Temporarily  
Inside End View  
Wrapped  
Core Wrapper  
3/4" (19 mm)  
d. Push cable through port and slide end cap  
down cable so not to interfere with cable  
preparations or splicing.  
Sheath Scuff  
883655  
DO NOT SLIT END CAP UNLESS  
INSTALLING ON EXISTING CABLE.  
a. Insert base assemblies of shield connectors  
between the core wrapper 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 (5.2 ± 0.6 kg·m).  
4.2  
End Cap Installation on Straight Through  
or Express Cable Procedure:  
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 the cone(s). See cable diameter tape on  
back cover.  
180°  
Single Sheath  
c. Slit end cap between raised guide rails.  
Slit  
883657  
Note:  
Use only 1 (one) sheath connector on each  
cable for the 2" (50 mm) diameter closures.  
842845  
b. Trim core wrapper, leaving 3/4" (19 mm).  
d. Place cap around cable.  
c. Install insulation sleeve on strain relief  
bar(s). Trim length if necessary to clear  
mounting holes.  
e. Slide locking "H" Strip into place over the  
raised guide rails. Start at the large (body)  
end and work towards the small end of the  
cone. Cut "H" Strip to length.  
d. Install one strain relief bar on Shield Bond  
Connectors (to hold splice opening and  
provide temporary bond.)  
"H" Strip in Place  
Note:  
Branch cables should be bonded according  
to illustrations. If necessary, shield  
connector studs may be trimmed to clear  
cover halves of smaller diameter closures.  
2847  
842846  
f. Slide end cap down so not to interfere with  
cable preparations or splicing.  
5
 
3" – 9" Kits  
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  
(5.2 ± 0.6 kg·m).  
Strain Relief Bar  
Strain Relief Bar  
2" Kit  
Bonding Braid  
883657  
180°  
e. Splice conductors per standard procedure.  
f. To insure thorough encapsulation of  
conductors, do not tightly bind the splice  
bundle.  
Double Sheath  
883658  
g. Install second bond bar if required.  
Note:  
Use only 1 (one) shield connector on each  
cable for 2" (51 mm) diameter closures.  
h. Remove vinyl tape from scuffed sheaths.  
Keep these areas clean during the  
following bonding and sealing collar  
construction operations.  
g. Build inner sheath sealing collars on  
exposed inner sheaths. Sealing collars are  
one wrap of 3/4" (19 mm) B sealing tape  
completely overwrapped with highly  
stretched DR tape (white side out).  
i. Build outer sheath sealing collars just  
beyond ends of strain relief bar(s). Sealing  
collars are one wrap of 3/4" (19 mm) B  
sealing tape. Completely overwrap with  
highly stretched DR tape (white side out.)  
h. Cover inner sheath sealing collars with  
vinyl tape to protect them from  
contamination of grease and dirt.  
DR Tape  
i. Remove core wrap even with inner sheath.  
j. Install insulation sleeve on strain relief  
bar(s). Trim to length if necessary to clear  
mounting holes.  
883657  
B Sealing Tape  
j. Install hose clamps over ends of strain  
relief bar(s).  
k. Install one strain relief bar on 3M™  
ScotchlokShield Bond Connectors (to hold  
splice opening and provide temporary bond).  
Note:  
Rotate hose clamps so heads will not  
obstruct fill ports on body.  
k. Overwrap strain relief hose clamps with DR  
tape to keep hose clamps tails from flagging.  
Note:  
Branch cables should be bonded according  
to illustrations. If necessary, shield  
connector studs may be trimmed to clear  
cover halves of smaller diameter closures.  
5.8  
Double Sheath Cables Procedure:  
6" (152mm) Scuff  
88T  
3" – 9" Kits  
6" (152mm)  
Scuff  
Inner Sheath  
1-1/2" (38 mm)  
Strain Relief  
Bars  
2" Kit  
883658  
Sheath Scuff  
a. Remove outer sheath and shield for a  
splice opening no greater than the  
maximum splice opening listed for  
closure size in closure dimension guide.  
Inner Sheath Sealing Collar  
Bonding Braid  
883658  
l. Splice conductors per standard procedure.  
m.To insure thorough encapsulating  
compound penetration, do not tightly bind  
the splice bundle.  
b. Scuff 6" (152 mm) of outer sheath.  
c. Wrap scuffed sheath with vinyl tape.  
n. Remove Scotch® Vinyl Tape 88T from  
scuffed sheath(s) and inner sheath sealing  
collars. Keep these areas clean during  
the following bonding and sealing collar  
construction operations.  
Note:  
Vinyl Tape should be removed from under  
Shield Bond Connector when installed.  
d. Scuff 2" (51 mm) of inner sheath.  
e. Remove inner sheath, except for 1-1/2"  
(38 mm) at both ends of splice opening.  
6
 
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.  
883660  
6.7  
Mix compound according to instructions.  
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).  
Note:  
Carefully follow health, safety and  
environmental information on product  
label or Material Data Sheet for  
encapsulating compound being used.  
6.8  
Position closure in final position to be buried,  
then fill closure with compound. Continue  
mixing and pouring compound until closure is  
completely filled and trapped air is removed.  
DR Tape  
6.9  
Close fill ports with the snap-in caps.  
B Sealing Tape  
6.10  
Check for any compound leaks. If leaks are  
observed, tighten hose clamps and retape as  
required.  
883659  
6.11  
Closure can be buried immediately.  
6.0 Closure Assembly  
Note:  
Make sure all vinyl tape has been removed  
from splice encapsulation area.  
7.0 Closure Reentry  
6.1  
Center lower closure half on splice bundle and  
attach upper half (upper half has fill ports)  
mating the tongue and groove.  
7.1  
7.2  
7.3  
7.4  
7.5  
7.6  
Remove hose clamps from closure and end  
caps. Remove any tape from end caps.  
With a twisting motion, pull end caps from  
closure and slide down cable.  
Grasping closure at one end, slowly separate  
halves from encapsulant.  
883659  
Remove spacer web from splice and discard.  
DO NOT REUSE THIS SPACER WEB.  
6.2  
6.3  
Place one large hose clamp around center of  
closure and tighten.  
Tear cured encapsulant away, as necessary, to  
access splice.  
Set end caps in grooves on closure body ends  
and secure with large hose clamps. Seal end  
caps to cable sheaths with 2 half-lapped layers  
of vinyl tape. Start the half-lap layers on the  
cable and tape up the cone.  
After completion of repair, place 3M™  
ScotchcastSpacer Web 4430 around splice  
and reassemble closure as outlined in Section  
6.1 - 6.3. End caps and sleeves can be  
reused.  
Note:  
If original end caps are reused, place a  
small piece of B-sealing tape in slots on  
inside of caps.  
883659  
6.4  
6.5  
Position closure for burial on firmly packed  
earth. Avoid sharp bends or kinks in the cable.  
Note:  
Be sure that the spacer web 4430 does not  
block the fill ports.  
Slightly incline one closure end about 1/2"  
(13 mm). Properly place supports under the  
closure for compound filling.  
7.7  
Fill closure with new compound as outlined in  
Sections 6.4 - 6.11.  
6.6  
Insert funnel into lower closure fill port.  
(During filling, air will escape from higher  
end.)  
7
 
9.2  
Force service wire through port.  
8.0 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.  
883661  
Half Body Top  
Full Body Top  
9.3  
Scuff service wire sheath that will be located  
inside closure. Build a sealing collar on  
each service wire. Service wire collars are  
one wrap of 3/4" B sealing tape completely  
overwrapped with highly stretched DR tape  
(white side out). Align the service wire  
sealing collars directly over the outer sheath  
sealing collars on main cable.  
75350  
Full Body Bottom  
Half Body Bottom  
8.3  
Fill closure with compound as outlined in  
Sections 6.4 - 6.11.  
DR Tape  
9.0 Adding Service Wires (2" - 5",  
50mm - 125mm Closures)  
Service Wire  
Sealing Collar  
9.1  
Cut a small "+" pattern through the service  
wire port.  
812027  
9.4  
9.5  
Bond per standard procedure.  
Install end cap. (See Section 4). Tighten hose  
clamps.  
9.6  
Complete closure assembly per Sections 5  
and 6.  
883661  
3M, Scotchcast, Scotchlok and MS2 are trademarks of 3M Company.  
Important Notice  
All statements, technical information, and recommendations related to 3M’s products are based on information believed to be reliable, but the  
accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended  
application. You assume all risks and liability associated with such use. Any statements related to the product which are not contained in  
3M’s current publications, or any contrary statements contained on your purchase order shall have no force or effect unless expressly agreed  
upon, in writing, by an authorized officer of 3M.  
Warranty; Limited Remedy; Limited Liability.  
This product will be free from defects in material and manufacture for a period of one (1) year from the time of purchase. 3M MAKES NO  
OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR  
A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s  
option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not  
be liable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of the legal  
theory asserted.  
Communication Markets Division  
3M Telecommunications  
6801 River Place Blvd.  
Austin, TX 78726-9000  
800.426.8688  
Recycled paper  
40% Pre-consumer waste paper  
10% Post-consumer waste paper  
Fax 800.626.0329  
Litho in USA  
© 3M 2006 78-8135-4353-1-A  
 

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