How is water migration prevented in the cable design?

February 5, 2020

Traditionally, cable designs have utilized a jelly-flooding compound in the core. By filling the interstitial voids with this compound, the migration of water within the cable has been blocked preventing water ingress along the core. Technological improvements have been made and water migration is now typically prevented by placing dry, water reactive components (Super Absorbent Polymer materials) within the cable core. These SAP components work by forming a gel compound when in contact with water. The gel acts as a barrier by filling the interstices of the core and prevents water penetration. By using cables with a dry core, significant construction savings can be realized because cable access time is reduced by eliminating the step of cleaning the buffer tubes during installation and handling.

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