Innovation in fire resistant cabling
The new INFIT technology, dedicated to fire resistant cables, has been launched by Nexans.
To insure the integrity of flexible cable insulation during a fire, the cable industry has, traditionally, used two technologies - fire resistant Mica taping and ceramic forming silicone rubbers.
The classical insulation taping based on Mica, and largely used since the 80’s, can be easily implemented at industrial scale by giving a hard and good electrical insulation when overcoated with a cross-linked polyethylene. And, the silicone rubber insulation with its direct extrusion on the conductors gives a good compromise between fire performance and ease of installation. However, considering today’s requirements, regarding resistance, strippability, ease of connection and of course fire performance, Nexans has developed the INFIT technology which is dedicated to fire-resistant cable insulation.
INFIT combines in a polymeric material offering the advantages of the tough mica tapes layer and the extruded silicone insulation layer. This enables Nexans cables to combine the hard and easy to handle surface of traditional mica tape/XLPE cables with the strippability and easy installation of flexible silicone rubber insulated cables.
INFIT technology allows an enhanced integrity of cable insulation during a fire, says the company. In the event of a fire, it transforms the insulation from a flexible, plastic covering to a tough insulating ceramic layer to assure circuit-integrity.
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