Cold Shrink Tubes
Cold Shrink tubes manufactured by 3M Electrical are a series of open-ended, tubular rubber sleeves, which are factory expanded and assembled onto a removable core.
Cold shrink tubes are supplied for field installation in a pre-stretched condition manufactured from EPDM rubber or silicone tubing.
The core is removed after the Cold Shrink tube has been positioned for installation over an inline connection, terminal lug or cable allowing the tube to shrink and form a waterproof seal – no gas torches or heat required.
Read and watch our Video Blog about Cold Shrink tubings and learn how 3M pioneered the development of this type of technology to provide LV MV HV Cable Accessories to enable the cable repair, splice, joint or termination of power cables with unrivalled field service performance for utility power systems.
3M Cold Shrink tubes provide fast, safe and simple electrical insulation without the dangers and hassles of “hot-working” – no naked flames, no heat shrink gas torches, no ignition tooling, no “hot-work” permit applications.
Cold Shrink tubes manufactured by 3M Electrical are water-resistant and conform to the water seal requirements of ANSI C119.1.
♦ ANSI C119.1 American National Standard for Electric Connectors - Sealed Insulated Underground Connector Systems Rated 600 Volts
Typical 3M Cold Shrink Tubes applications : 1000V primary insulation and cable protection for direct burial, submersible and overhead installations.
Cold Shrink Tubes – Features
- Cold shrink provides a constant radial pressure seal
- No heat required with 3M Cold Shrink – 100% cold applied
- No specialist cable jointing or heat shrink tools required
- Quality – long term reliability
- Moisture resistant for submersible and outdoor applications
- Suitable as primary insulation on low voltage cables and cable splices up to 1000V AC
➡ Watch Video – How To Install Cold Shrink Tubes
Cold Shrink EPDM Tubes – 3M 8420 Series
Selection table for 3M Cold Shrink tubes manufactured from EPDM rubber:
|3M Cold Shrink Tubes Part No||Min Diameter (mm)||Max Diameter (mm)||Length (mm)|
COLD SHRINK Silicone TUBES – 3M 8440 SERIES
Selection table for 3M Cold Shrink tubes manufactured from Silicone rubber:
|3M Cold Shrink Tubes Part No||Cable Range (mm² )||Application Range (mm)||Dimensions (mm)|
|Min. Dia.* For Seal||Max. Dia.** Insulator Covers||(A) Length||(B) ID|
|8443-2||10 – 35||6.86||14.22||29.2 – 39.6||17.3|
|8443-6.5||10 – 35||6.86||14.22||119 – 140||17.3|
|8445-2.5||35 – 50||8.89||18.29||30.5 – 48||21.3|
|8445-7.5||35 – 50||8.89||18.29||132 – 152||21.3|
|8447-3.2||50 – 70||12.19||24.13||48.3 – 64||27.2|
|8447-8||50 – 70||12.19||24.13||147 – 175||27.2|
3M Cold Shrink Tubes For Subsea & Underwater Surveys
3M Cold Shrink Tubes are extensively used to provide effective waterproof seals in the subsea cables industry for several key reasons.
Thorne & Derrick International stock a complete range of 3M Cold Shrink Tubes in both EPDM rubber and silicone.
Typical Applications for Cold Shrink
- Sidescan Sonars
- Sub-Bottom Profiling
- Underwater Camera Systems
- Data Telemetry Systems
- Electric Survey Winches
- Digital Video Recorders
- Underwater Trenching Machines
- Subermersible Marine Pumps
- ROVs (Seabed To Surface)
- Subsea Camera & Lighting Cables
- Subsea Hoses, Umbilicals & Cables
Extending Cold Shrink Tubes
To enable the extension and lengthening of Cold Shrink tubes to achieve increased surface protection of cables, pipes or hoses the overlap section of the abutted tubes can be sealed using 3M 2228 Mastic Tape – the Scotch tape should be installed with at least a 2″ overlap of 3 layers and approximately 10mm from the end of the protection tube.
3M Electrical invented Cold Shrink in the 1970’s and since then their technology has been adopted by owners and operators of power cable and distribution systems across the globe – the live memory action of the specially formulated Cold Shrink material ensures a permanent, durable environmental seal and moisture-proof insulation.
➡ Should you require customer service or technical support on the selection or specification of LV MV HV Cable Accessories please contact us – view the full range of 3M Cold Shrink Tubes below.