Patent ID: 8829352
Filing Date: 2014-09-09
Classification: H01B

Abstract:
1. A plenum rated communications cable, said cable comprising: a jacket; a first plurality of twisted pairs, each twisted pair having two conductors, insulated with a single layer of insulation, twisted around one another, a second plurality of twisted pairs, each twisted pair having two conductors, insulated with a dual layer of insulation, twisted around one another, wherein said single layer of insulation on said conductors of said first plurality of twisted pairs is made from FRPP (Flame Resistant Poly Propylene) and wherein said dual layer insulation on said conductors of said second plurality of twisted pairs includes a first inner layer of FRPP (Flame Resistant Poly Propylene) and a second outer layer of PEI (Polyetherimide), wherein said combination of said first plurality of twisted pairs and said second plurality of twisted pairs are such that said cable meets the NFPA 262 flame test, and wherein said cable includes a sufficient quantity of said first plurality of twisted pairs, so as not to impair flexibility of said cable.