High count transmission media plenum cables which include non-halogenated plastic materials

A cable which may be used in buildings in concealed areas such as in plenums or in riser shafts includes a core (22) which in a metallic conductor cable includes at least twenty-five transmission media each of which is enclosed with a non-halogenated plastic material. The core is enclosed with a jacket (28) which also is made of a non-halogenated plastic material. The non-halogenated plastic material of the insulation is selected from the group consisting of a polyetherimide and a silicone-polyimide copolymer, or a blend comprising the polyetherimide and the silicone-polyimide copolymer. For the jacket, the plastic material includes a blend composition of silicone-polyimide copolymer and a flame retardant and smoke suppressant system comprising titanium dioxide and zinc borate.