Concentric Stranding : A stranding configuration in which individual wires are stranded concentrically with no reduction in overall diameter. Typically used for bare conductors
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}