A flame retardant cable comprising: an insulated conductor which comprises (a) a conductor; (b) an inner insulation layer surrounding the conductor; and (c) an outer insulation layer surrounding the inner insulation layer, wherein the insulated conductor has a composite dielectric constant less than or equal to 2.6 and a dissipation factor of less than or equal to 0.005, per ASTM D1531 test method, wherein the inner insulation layer or the outer insulation layer has a dielectric constant greater than 2.6 or a dissipation factor greater than 0.005, per ASTM D1531 test method, and wherein a first polymeric composition for preparing the inner insulation layer comprises a first non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide and a second polymeric composition for preparing the outer insulation layer comprises a second non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide; wherein the first polymeric composition further comprises non-halogenated flame retardant additives in an amount no more than 30 parts per hundred parts of the first non-halogenated polymer by weight and the second polymeric composition further comprises non-halogenated flame retardant additives in an amount between 100 to 300 parts per hundred parts by weight of the second non-halogenated polymer by weight; and wherein the non-halogenated flame retardant additives are selected from the group consisting of ethylene diamine phosphate, melamine, melamine pyrophosphate, melamine phosphate, ammonium polyphosphate, melamine polyphosphate, calcium carbonate, talc, clay, organo-modified clay, calcium hexaborate, alumina, titanium oxides, carbon nanotubes, zinc borate, wollastonite, mica, silicone polymers, phosphate esters, hindered amine stabilizers, melamine octomolybdate, ammonium octomolybdate, expandable graphite, frit, hollow glass beads, and mixtures thereof. an insulated conductor which comprises (a) a conductor; (b) an inner insulation layer surrounding the conductor; and (c) an outer insulation layer surrounding the inner insulation layer, (a) a conductor; (b) an inner insulation layer surrounding the conductor; and (c) an outer insulation layer surrounding the inner insulation layer, wherein the insulated conductor has a composite dielectric constant less than or equal to 2.6 and a dissipation factor of less than or equal to 0.005, per ASTM D1531 test method, wherein the inner insulation layer or the outer insulation layer has a dielectric constant greater than 2.6 or a dissipation factor greater than 0.005, per ASTM D1531 test method, and wherein a first polymeric composition for preparing the inner insulation layer comprises a first non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide and a second polymeric composition for preparing the outer insulation layer comprises a second non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide; wherein the first polymeric composition further comprises non-halogenated flame retardant additives in an amount no more than 30 parts per hundred parts of the first non-halogenated polymer by weight and the second polymeric composition further comprises non-halogenated flame retardant additives in an amount between 100 to 300 parts per hundred parts by weight of the second non-halogenated polymer by weight; and wherein the non-halogenated flame retardant additives are selected from the group consisting of ethylene diamine phosphate, melamine, melamine pyrophosphate, melamine phosphate, ammonium polyphosphate, melamine polyphosphate, calcium carbonate, talc, clay, organo-modified clay, calcium hexaborate, alumina, titanium oxides, carbon nanotubes, zinc borate, wollastonite, mica, silicone polymers, phosphate esters, hindered amine stabilizers, melamine octomolybdate, ammonium octomolybdate, expandable graphite, frit, hollow glass beads, and mixtures thereof. wherein the inner insulation layer or the outer insulation layer has a dielectric constant greater than 2.6 or a dissipation factor greater than 0.005, per ASTM D1531 test method, and wherein a first polymeric composition for preparing the inner insulation layer comprises a first non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide and a second polymeric composition for preparing the outer insulation layer comprises a second non-halogenated polymer and is substantially-free of halogenated flame retardant additives or antimony oxide; wherein the first polymeric composition further comprises non-halogenated flame retardant additives in an amount no more than 30 parts per hundred parts of the first non-halogenated polymer by weight and the second polymeric composition further comprises non-halogenated flame retardant additives in an amount between 100 to 300 parts per hundred parts by weight of the second non-halogenated polymer by weight; and wherein the non-halogenated flame retardant additives are selected from the group consisting of ethylene diamine phosphate, melamine, melamine pyrophosphate, melamine phosphate, ammonium polyphosphate, melamine polyphosphate, calcium carbonate, talc, clay, organo-modified clay, calcium hexaborate, alumina, titanium oxides, carbon nanotubes, zinc borate, wollastonite, mica, silicone polymers, phosphate esters, hindered amine stabilizers, melamine octomolybdate, ammonium octomolybdate, expandable graphite, frit, hollow glass beads, and mixtures thereof.