Heat shrinkable cable feed throughs
Cable feed throughs are used to guide cables or cable bundles from a larger object, such as a pipe. This can be particularly useful when a cable exits a building through a conduit.
What is a heat-shrinkable cable feed through?
A heat-shrinkable cable feed through resembles a regular heat shrink sleeve, but one end has a significantly larger diameter than the other. The end with the larger diameter is placed over the pipe, and the cable is guided through the smaller end. The entire assembly is then heated and shrunk onto both the pipe and the cables.
Properties of heat-shrinkable cable feed throughs
Heat-shrinkable cable entries are made from crosslinked polyolefin. This material makes them UV resistant (enhanced by the black color) and halogen-free. However, they are not flame retardant or self-extinguishing. These properties make them ideal for use in low-voltage applications.
All variants contain an adhesive layer on the inside. When the cable entry is heated (to shrink it), the adhesive melts, ensuring a moisture- and dust-proof seal.
Heat-shrinkable cable feed throughs have an operating temperature range of -55 °C to 110 °C. The minimum full shrink temperature is 110 °C.
Use of heat-shrinkable cable feed throughs
As mentioned above, heat-shrinkable cable feed throughs are primarily used when cables exit a large object (such as a pipe) and are guided through, for example, a wall. The cable feed through protects both the pipe and the cables from moisture and dust, creating a reliable transition. Always ensure that the larger end fits over the pipe and the smaller end over the cables.
When heated, cable entries also shrink in length—by up to 10%. Take this into account when selecting the appropriate variant.
Personal advice
Do you have questions about any of our heat-shrinkable cable feed throughs, or would you like more information? Please contact our advisors. They’ll be happy to assist you!
