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BUY NOW and PICKUP AT OUR CAGUAS STORE. You can call us at (787)703-1818
BUY NOW and PICKUP AT OUR CAGUAS STORE. You can call us at (787)703-1818

3M Cold Shrink Insulator

Original price $14.95 - Original price $36.25
Original price
$14.95 - $36.25
Current price $16.95

Details        Spec Sheet

  • 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 black EPDM rubber
  • Made of EPDM rubber which contains no chlorides or sulfur
  • Withstands temperatures of -40 to 194 degrees F (-40 to 90 degrees C)
  • Environmental sealing for communication and other non-electrical applications

3M™ Cold Shrink Connector Insulators 8420 and 8430 Series are designed using 3M’s proprietary cold shrink delivery system. Products are supplied prestretched on a removable core for efficiency and ease of installation. Removal of the core (unwinding) after positioning the splice allows the product to shrink into position forming a moisture-tight seal. The live memory action of the specially formulated EPDM material promotes a permanent, durable environmental seal and insulation, with a typical operating temperature range from -40–194°F (-40–90°C). The 8420 insulator meets requirements of ANSI C119-1 and Western Underground Guide 2.14 for secondary splices rated up to 1 kV. Applications: Primary electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cable splicing rated to 1000 V. Good for repairs and environmental sealing for communication and other non-electrical applications. Important: Use insulation jacket or connector O.D. for final ordering criteria. * Mastic pads included for cable O.D. build-up. ** Kit contains adapters. *** These sizes are listed for availability only and are not designed to be used as primary insulation. These tubes are for conduit sealing and breakouts. ****Maximum connector length: 5.625” “Point of Purchase” packaging designated by “P”. Example: 8423-6P



Cable Shielding

Non-shielded, Tape Shield, UniShield®, Wire Shield

Cable Type

Power Cable

Case Quantity


Conductor Material

Aluminum, Copper

Conductor Sizes (Imperial)

2/0 AWG, 250 kcmil, 3/0 AWG, 4/0 AWG

Inner Diameter After Shrink (Imperial)

0.547 in

Inner Diameter After Shrink (Metric)

13.9 mm

Inner Diameter Before Shrink (Imperial)

1.185 in

Inner Diameter Before Shrink (Metric)

30.1 mm

Manufacturing Origin



EPDM Rubber

Maximum Conductor Size (Imperial)

246 kcmil

Maximum Connector Length

5.0 in

Maximum Connector Length (Metric)

127.0 mm

Maximum Operating Temperature (Celsius)

90 Degree Celsius

Maximum Operating Temperature (Fahrenheit)

194 Degree Fahrenheit

Minimum Conductor Size (Imperial)

3/0 AWG

Minimum Operating Temperature (Fahrenheit)

-40 Degree Fahrenheit



Number of Conductors


Overall Length (Imperial)

9 in

Overall Length (Metric)

228.6 mm

Product Type


Relaxed Tube Length

9 in

Relaxed Tube Length (Metric)

228.6 mm

Splice Type

Cold Shrink


1 kV

Model: 8424-8 #10 @ 1/0