18/20KV Cold Shrinkable Power Cable Accessories
18/20KV Cold Shrinkable Power Cable Accessories are silicone rubber termination and joint kits for 18/20kV distribution cable. Supplied pre-expanded on removable cores, they install without heat: position the body, withdraw the core, and the sleeve contracts onto the prepared cable with constant radial pressure. Service range is -50℃~+200℃ with a multi-layer wall, built to IEEE 386. The specification is below; tell us the cable type and cross-section and we return the matching kit list.
Specification
| Material | Silicone Rubber |
|---|---|
| Operating temperature | -50℃~+200℃ |
| Shrink ratio | Cold shrink |
| Voltage rating | 18/20KV |
| Wall type | Multi-layer |
| Standards | IEEE 386 |
What it is and how it works
The accessory body is molded silicone rubber expanded onto a spiral support core at the factory. Installation is core removal only: the cross-linked silicone relaxes back onto the cable interface, keeping uniform radial pressure along the recovered length. No flame or heat gun is used, which qualifies the kits for locations with hot-work bans and for live-adjacent switching programs. The silicone wall carries the stress-grading and insulation layers in one elastic body, and its UV and ozone resistance covers outdoor as well as indoor duty. Pre-expanded parts have a defined shelf life; rotate stock by lot date.
Where 18/20KV Cold Shrinkable Power Cable Accessories is used
Primary applications: HV cable cold-shrink termination.
How to select the right size
Four inputs decide the kit:
- System voltage. Confirm the 18/20kV class and Um; the wall and creepage design is voltage-specific.
- Conductor cross-section. Each kit spans a stated cross-section window : check both aluminium and copper ranges.
- Core count and duty. Single- and multi-core, indoor and outdoor variants differ in body length and sheds.
- Termination or joint. Match the kit type to the work; contents differ.
Common Failure Modes & How to Prevent Them
These are the issues most often seen when installing or specifying 18/20KV Cold Shrinkable Power Cable Accessories, with the root cause and the prevention or fix for each.
The factory-expanded tube aged on the shelf
Root cause: Cold-shrink comes pre-expanded on a removable core, held by a lubricant. Past its shelf life the silicone relaxes and won't recover tightly.
Fix: Check the lot date, store cool and dry, and use before expiry. On receipt, confirm the tube still snaps back when the core is pulled in a sample.
It doesn't grip as hard as heat shrink
Root cause: Silicone recovery force is lower than polyolefin, and on irregular shapes it can leave small gaps.
Fix: Size to the substrate and, on uneven profiles, add mastic or a semi-conducting layer to fill voids. Where a hard crush fit is needed, heat-shrink still wins.
Taking it off later is a job
Root cause: Silicone bonds to itself and to the cable; cold shrink is one-time, like heat shrink.
Fix: Plan access before install. If the joint may need service, leave a way to cut the sleeve cleanly and fit a new one.
No power for a heat gun
Root cause: Heat-shrink needs a heat source; remote joints often have none.
Fix: That is exactly where cold shrink pays off - no flame, no gun, just pull the spiral core. Keep it for field and joint work; use heat-shrink on the bench.
Lubricant residue attracted dirt
Root cause: The release lubricant used during expansion can stay on the surface.
Fix: Wipe the surface before install and handle with clean gloves. A clean sleeve sheds dirt better and reads true on inspection.
Frequently asked questions
Do I need a heat gun or open flame to install it?
No. 18/20KV Cold Shrinkable Power Cable Accessories is a cold-shrink assembly: it ships pre-stretched on a removable plastic core, and you simply pull the core out by hand. The silicone rubber (Silicone Rubber) shrinks and grips under its own memory: no heat gun, torch or power source. That is why it is the safer choice inside switchgear, manholes, confined spaces, refineries and mining where an open flame is banned.
What temperature and environment can it handle?
The body is Silicone Rubber, rated -50℃~+200℃. It stays flexible through thermal cycling and resists UV, ozone and weathering, so it is used for both indoor termination/joint sets and outdoor riser applications. For sustained heat above the rated ceiling, tell us: we steer you to a higher-grade material.
Will it stay put under vibration and load swings?
Yes. Cold shrink applies constant radial pressure along the whole length, so it will not slip, relax or rotate the way a taped joint can. That is the main reason utilities specify it for cable terminations and joints that must survive decades of load cycling.
What voltage class is it built for?
This kit is built for 18/20KV systems (). Confirm your conductor cross-section and core count (single/3-core) when ordering so we ship the right body and stress-control components.
What certifications support a tender or utility approval?
Standard compliance is IEEE 386. Certificates are issued per batch; tell us the target market (EU / US / Asia / utility spec) and we align the documentation to your filing.
What is in the kit and how long does installation take?
A full set covers termination and joint (indoor/outdoor as applicable). Because there is no heating step, a trained fitter can close a joint in minutes with basic hand tools: faster and more repeatable than heat-shrink or taping, with less chance of a cold spot or carbon-contaminated surface.
What is the shelf life of cold shrink?
It comes pre-expanded on a core held by lubricant. Check the lot date, store cool and dry, and use before expiry; confirm it still snaps back on a sample.
Does cold shrink grip as hard as heat shrink?
Silicone recovery force is lower, so on irregular shapes add mastic or a semi-conducting layer to fill voids. Heat-shrink still gives a harder crush fit.
Can I remove cold shrink later?
It is one-time, like heat shrink. Plan access before install; to service, cut the sleeve cleanly and fit a new one.
Why use cold shrink in the field?
No flame, no gun, no power - just pull the spiral core. That is its main edge for poles, pits, and remote joints.
Request a quote for 18/20KV Cold Shrinkable Power Cable Accessories
Send the voltage class, cable cross-section, core count, indoor/outdoor duty and quantity. We return the kit part numbers, contents and lead time.
Certifications & Compliance
18/20KV Cold Shrinkable Power Cable Accessories is built to the following standards and directives. Certificates are supplied per batch on request.
Tell us your target market (EU / US / Asia) and we align the documentation to your filing.
View our verified UL / SGS / RoHS certificates →