Cold Shrink Connector Insulators
8420 Series
Data Sheet
1. Product Description
3M Cold Shrink Connector
Insulators are open-ended, tubular,
rubber sleeves which are factory
expanded and assembled onto a
removable core. The core is removed
after the tube has been positioned for
installation over an inline connection,
terminal lug, etc., allowing the tube to
shrink and form a water-resistant seal.
The insulating tube is made of EPDM
rubber which contains no chlorides or
sulfurs. Six diameter sizes will cover a
range of 1000 volt cable from 10 AWG
through 1000 kcmil, copper and
aluminum conductors.
To extend the useful life of this product
in applications which are continuously
exposed to high levels of ultra-violet
radiation, overwrap with Scotch Super
33+ Vinyl Tape or Scotch 70 Silicone
Tape.
Features:
Simple installation, requires no tools.
Accommodates a wide range of cable
sizes.
No torches or heat required.
Improved, tougher rubber formulation to
withstand backfilling.
Water-resistant. Meets the water seal
requirements of ANSI C119.1.
Seals tight, retains its resiliency and
pressure even after prolonged years of
aging and exposure.
Excellent wet electrical properties.
EPR
(Ethylene Propylene Rubber)
No mastic or tape required to seal.
Physical Properties
Resists fungus.
Test Method
Resists acids and alkalies.
D Color
Resists ozone.
D 300% Modulus
(ASTM D 412–75)
480 psi
(3,3 MPa)
2. Applications
D Ultimate Tensile
(ASTM D 412–75)
Original
1400 psi
(9,6 MPa)
Primary electrical insulation for all solid
dielectric (rubber and plastic)
insulated wire and cable splicing rated
to 1000 volts.
Direct burial or submersible.
For indoor, outdoor.
Physical protection and moisture sealing
for high-voltage, air-insulated
connectors and lugs such as spacer
cable and lug connections to bus bar.
Insulation of secondary splices, copper
or aluminum conductors.
Typical Value*
Black
D Ultimate Elongation
(ASTM D 412–75)
Original
750%
D Die C Tear
(ASTM D 624C–73)
Original
150 pli
(26,3 KN/m)
D Fungus Resistance
(ASTM G–21)
28 days exposure
No Growth
D Moisture Absorption
wt. gain
7 days 90 _C (194 _F) H2O 1.8%
Electrical Properties
Relocation of service.
Test Method
Dig-in repairs.
D Dielectric Strength
(ASTM D 149–75)
Original
@ 1,78 mm
365 v/mil
14,3 Mv/m)
D 7 days in H2O at
90 _C (194 _F)
282 v/mil
(11,1 Mv/m)
Sheath repairs.
Good thermal stability.
A. Typical Physical and
Electrical Properties
Environmental sealing for
communication and other
non-electrical applications.
Insulation of inline conductor transition
connectors (see Figure 1).
Figure 1
* All values are averages and are not
intended for specification purposes.
8426 PST Cold Shrink Connector Insulator
2/0
4/0
15/16I Connector
Typical Value*
B. Cold Shrink Selection Table
Product Diameter Range
(minimum – maximum)*
inches (mm)
Product Number
Conductor Sizes
AWG & Kcmil
Relaxed Tube Length
inches (mm)
8423–6
6–4
0.31 – 0.56 (7,80 – 14,3)
6.0 (152)
8424–8
10 – 1/0**
0.10 – 0.82 (2,54 – 20,9)
8.0 (203)
8425–8
2 – 1/0
0.40 – 0.82 (10,1 – 20,9)
8.0 (203)
8426–9
8426–11
2/0 – 250
2/0 – 250
0.55 – 1.18 (13,9 – 30,1)
0.55 – 1.18 (13,9 – 30,1)
9.0 (229)
11.0 (279)
8427–6***
8427–12
8427–16
—
250 – 400
250 – 400
0.67 – 1.38 (16,8 – 35,1)
0.67 – 1.38 (16,8 – 35,1)
0.67 – 1.38 (16,8 – 35,1)
6.0 (152)
12.0 (305)
16.0 (406)
8428–6***
8428–12
8428–18
—
450 – 800
450 – 800
0.95 – 1.94 (24,0 – 49,3)
0.95 – 1.94 (24,0 – 49,3)
0.95 – 1.94 (24,0 – 49,3)
6.0 (152)
12.0 (305)
18.0 (457)
8429–6***
8429–9****
8429–12
8429–18
—
900 – 1000
900 – 1000
900 – 1000
1.27 – 2.67 (32,2 – 67,8)
1.27 – 2.67 (32,2 – 67,8)
1.27 – 2.67 (32,2 – 67,8)
1.27 – 2.67 (32,2 – 67,8)
6.0 (152)
9.0 (229)
12.0 (305)
18.0 (457)
8430–9***
8430–18
—
1250 – 2000
1.68 – 3.69 (42,6 – 93,7)
1.68 – 3.69 (42,6 – 93,7)
9.0 (229)
18.0 (457)
NOTES:
*
Minimum = Seal Diameter.
Maximum = Connector Clearance Dimension.
** Product contains range-extending adapters (Without adapters, 8424–8/8425–8 ranges are identical).
*** Primary uses: Sealing of terminal lug barrels, conduit couplings and conduit–to–cable breakouts.
**** Maximum connector length: 5.625I (For longer connector bodies, select 8429–12/8429–18 as needed).
IMPORTANT: Use wire insulation/jacket diameters and connector O.D. for final sizing confirmation.
3. Maintenance
3M Cold Shrink Connector Insulator
Assemblies are stable under normal
storage conditions. They are not
impaired by freezing or overheating due
to the ambient temperatures found in
storage or shipping. Normal storage and
stock rotation are recommended. 3M
Cold Shrink removable core material
is polypropylene and recyclable with
other waste.
`3M', `Cold Shrink' and `Scotch' are trademarks of 3M.
Important Notice to Purchaser:
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.
Electrical Products Division
6801 River Place Blvd.
Austin, TX 78726-9000
800–245–3573
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.
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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 OR CONSEQUENTIAL
DAMAGES SUSTAINED OR INCURRED
BY REASON OF THE USE OF ANY OF
THE SELLER'S PRODUCTS.
Litho in USA
1996 3M
80Ć6108-5330-3
