Nanocables　of　metallic　copper　nanowire　cores　coated　with　amorphous　carbon　(Cu@C　NCs)　and　graphitic　carbon　(Cu@G　NCs)　were　mass　synthesized　via　a　hydrothermal　approach　and　a　further　carbonization　process.　TEM　and　other　techniques　revealed　that　approximate　to　15　nm　thickness　graphitic　carbons　uniformly　encapsulated　the　well　crystallized　copper　nanowires　along　the　[110]　direction.　The　electrical　resistivity　measurement　indicated　that　the　Cu@C　NCs　are　insulating　while　the　Cu@G　NCs　are　conductive.　In　addition,　the　electrical　resistivity　of　a　single　Cu@G　NC　was　approximate　to　1.6158　x　10(-5)　Omega　cm　at　room　temperature,　lower　than　that　of　Cu　nanowires.　This　opens　a　door　to　broad　applications　in　nanoelectronics.　(C)　2016　Elsevier　B.V.　All　rights　reserved.