Cut Sheet

SJ–1A, SJ–2A & SJ–3A
Data Sheet
Cold Shrink Jacket Kits
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1. Product Description
3M SJ series Cold Shrink Splice Jacket Kits are a series
of open ended, tubular, rubber sleeves that combined with
Scotch 2228 Rubber Mastic Tape provide a sealed jacket
over cable splices installed on Jacketed Concentric Neutral
(JCN) and other types of jacketed power cable. The Scotch
2228 Rubber Mastic Tape provides for an assured sealing
interface between the cable jacket and the Cold Shrink
Jacket tube. It is also used to seal around a cable ground
conductor. The Cold Shrink Jacket tube is provided in an
expanded state, mounted on two inner supporting plastic
cores. As supplied in this prestretched condition, the tube is
ready for field installation. The jacketing tube is made of
EPDM rubber which contains no chlorides or sulfurs. Three
kit sizes cover an application range of 0.95 (24 mm) to 4.0
(101,6 mm).
Kit Contents:
Each kit contains sufficient quantity of the following
materials to jacket one cable splice.
— 1 Cold Shrink Jacketing Tube
— 1 Three Foot (914 mm) Roll Of Scotch 2228 Rubber
Mastic Tape
Features:
Easy to install, requires only workman’s hands. Simply
center over splice area and unwind core from each end to
shrink in place.
Versatile one-piece jacket that accommodates a wide range of
cable sizes and splice diameters.
No torches or heat required.
Seals tight, retains its resiliency and pressure even after years
of aging and exposure.
Tough rubber formulation to withstand rough back filling.
Water resistant. Meets the water seal requirements of ANSI
C119.1.
Compatible with cable jackets and cable semi-conducting
insulation shields.
Provides for a seal around cable ground conductor.
Resists fungus.
Resists acids and alkalies.
Resists ozone and ultraviolet light.
2. Applications
To jacket inline splices installed on Jacketed Concentric
Neutral (JCN) Cables rated 15, 25 and 35 kV and operating
temperature of 90C and an emergency overload rating of
130C.
Physical protection and moisture sealing inline splices installed
on shielded power cables having solid dielectric insulation
as follows: polyethylene (high and low density),
cross-linked polyethylene (XLP) and ethylene propylene
rubber (EPR).
For use at indoor and outdoor installations including direct
burial, aerial and submersible applications.
A. Typical Physical and Electrical Properties
EPDM Rubber
Physical Properties
Test Method Typical Value*
 Color Black
 300% Modulus 480 psi
(ASTM D 412–75) (3,3 MPa)
 Ultimate Tensile 1400 psi
(ASTM D 412–75) (9,6 MPa)
 Ultimate Elongation
(ASTM D 412–75) 750%
Original
 Die C Tear 150 pli
(ASTM D 624C–73) (26,3 KN/m)
Original
 Fungus Resistance
(ASTM G–21) No Growth
28 days exposure
 Moisture Absorption wt. gain
7 days 90C (194F) H
2
O 1.8%