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SKU 7000005943
Legacy SKU 80610134035
UPC 00054007344599
Catalog Number 8427-12
Product Number 8427-12

3M Cold Shrink Connector Insulators 8420 and 8430 Series are EPDM tubes designed using a unique Cold Shrink delivery system. Products are supplied pre-stretched on a removable core for efficiency and easy of installation. Removal of the core (unwind) after positioning allows the tube to shrink into position forming a moisture-tight seal. The live memory action of the specially formulated material ensures a permanent, durable environmental seal and insulation.

  • Specially designed for primary insulation of solid dielectric insulated wires and cable splicing rated to 1000 volts
  • Simple installation which requires no tools
  • Sealing of terminal lug barrels, conduit couplings and conduit-to-cable breakouts
  • Made of EPDM rubber which contains no chlorides or sulfur
  • Covers a wide range of cable cross sections
  • Withstands temperatures of -40 to 90 degC (-40 to 194 degF)
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On it's way to you Mid December, 2025  

Qty

Minimum Order 10 Items
Order Increment 10 Items
  Superior Electrical Insulation
  Immensely Durable
  Offers Solid Protection
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Weight 0.336 lbs
Width 9 in
Length 20 in
Height 1-1/2 in
Shipping Dimensions
Weight 3.35984 lb
Length 14.37008 in
Width 8.38583 in
Height 5.7874 in
Color Black

PRODUCT FAQ

  1. What is the purpose of 3M™ Cold Shrink Insulator 8427-12, 250-400 kcmil (125-200 mm²), 10/case?

    The purpose of this insulator is to provide reliable electrical insulation so that you can protect your equipment from short circuits and other potential damage.

  2. Can I install this insulator myself or do I need a professional?

    This insulator uses a simple cold shrink installation process, which makes it easy to install yourself without any special tools or training. However, we always recommend that you follow all safety guidelines and consult with a professional if you are unsure about any aspect of the installation.

  3. How long will this insulator last once it has been installed?

    Our high-quality materials ensure that this insulator will provide long-lasting protection against temperature variations, UV rays and environmental elements. While specific performance may vary based on usage conditions, our products are designed for durability and longevity in most applications for many years to come.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.

Product Description: 3M Connector Insulator 8420

Our 3M Connector Insulator 8420 is the perfect solution for all your splice insulation needs. It can be used as a cold shrink insulator on all solid dielectric insulated wires and cable splices. This product provides excellent moisture protection for secondary splices, dig-in repairs, and direct buried or submersible cable. The water-tight seal it creates is durable and long-lasting, providing a solid barrier for high-voltage lines, air-insulated connectors, or lugs.

Our 8420 Connector Insulator is ANSI Certified and RoHS 2011/65/EU Compliant, ensuring that it meets all necessary safety and environmental standards.

  • Can be used as a cold shrink insulator on all solid dielectric insulated wires and cable splices
  • Provides excellent moisture protection for secondary splices, dig-in repairs, and direct buried or submersible cable
  • Creates a water-tight seal that is durable and long-lasting
  • Provides a solid barrier for high-voltage lines, air-insulated connectors, or lugs
  • ANSI Certified and RoHS 2011/65/EU Compliant
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