Type NM-B (non-metallic 90° C) typically used in indoor applications inside wall cavities and attics. Please see Article 334 of the National Electrical Code (NEC) for further applications.
Construction: 2 conductor, 14 gauge solid construction has the insulated conductors (Black and White) parallel. The ground wire is wrapped with fire-retardant paper and laid parallel between the insulated conductors. Ground wire is 14 gauge solid also. The entire construction is wrapped with a paper separator before applying the jacket which is white on 14 gauge NM-B. PVC (polyvinyl chloride) jacket is applied over the complete assembly.