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3M™ Cold Shrink Connector

Insulators 8420 Series

Features

 Simple installation; requires no tools

 Accommodates a wide range of cable sizes

 No torches or heat required

 Good thermal stability

 Seals tight; retains its resiliency and pressure even after prolonged years of aging and exposure

 Excellent wet electrical properties

 Tough rubber formulation withstands backfilling

 Water-resistant; Meets the water seal requirements of ANSI C119.1

 No mastic or tape required to seal

 Resists acids and alkalis; resists ozone

 Operating temperature range: -40°F to 194°F (-40°C to 90°C)

Data Sheet October 2015

Product

Description

3M Cold Shrink Connector Insulators 8420 Series 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 does not

contain chlorides or sulfur. Six diameter sizes will cover a range of cable up to 1000 volts for copper

and aluminum conductors from 10 AWG through 1000 kcmil.

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 Electrical Tape or Scotch® Self-

Fusing Silicone Rubber Electrical Tape 70.

Applications

 Primary electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cable

splicing rated up to 1000 volts

 Direct burial and submersible

 For indoor and outdoor use

 Physical protection and moisture sealing for air-insulated connectors and lugs such as spacer

cable and lug connections to bus bar

 Insulation of secondary splices, copper or aluminum conductors

 Relocation of service

 Dig-in repairs

 Sheath repairs

 Environmental sealing for communication and other non-electrical applications

 Insulation of inline conductor transition connectors (see Figure 1)

3M™ Cold Shrink Connector Insulator 8426

2/0 4/0

15/16” Connector Figure 1

PAGE 1
3M™ Cold Shrink Connector Insulators 8420 Series Data Sheet Product Description October 2015 3M Cold Shrink Connector Insulators 8420 Series 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 does not contain chlorides or sulfur.
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3M™ Cold Shrink Connector Insulators 8420 Series Typical Physical and Electrical Properties Not for specifications. Values are typical, not to be considered minimum or maximum. Properties measured at room temperature 73°F (23°C) unless otherwise stated.
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M™ Cold Shrink Connector Insulators 8420 Series EHS Working around energized systems may cause serious injury or death. Installation should be performed by personnel familiar with good safety practice in handling electrical equipment. De-energize and ground all electrical systems before installing product.  3M Cold Shrink Removable Core is a mixed polymer and recyclable with other waste.