A single core cable refers to an electrical cable consisting of a single conductor enclosed within an insulating sheath. Designed to transmit power or electrical signals efficiently, this type of cable is widely used in various applications across industries. The conductor within the single core cable is typically made of copper or aluminum, chosen for their excellent conductivity properties. 

The insulating sheath, usually made of materials such as PVC or XLPE, provides electrical insulation and protection to the conductor. Single core cables are commonly utilized in power distribution systems, both for domestic and industrial purposes, as well as in telecommunications, where they facilitate the transmission of signals over long distances. They are also favored for their ability to handle higher current capacities compared to multi-core cables. With their straightforward construction and reliable performance, single core cables play a vital role in ensuring the efficient and safe transmission of electricity and signals in various sectors.