3M Cold Shrink Insulator
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
Brand |
3M™ |
Cable Shielding |
Non-shielded, Tape Shield, UniShield®, Wire Shield |
Cable Type |
Power Cable |
Case Quantity |
10 |
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 |
USA |
Material |
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 |
Model |
Cold-shrink |
Number of Conductors |
1 |
Overall Length (Imperial) |
9 in |
Overall Length (Metric) |
228.6 mm |
Product Type |
Splice |
Relaxed Tube Length |
9 in |
Relaxed Tube Length (Metric) |
228.6 mm |
Splice Type |
Cold Shrink |
Voltage |
1 kV |