Pre-installed conductors within an overall protective metallic interlocked armor 45 percent lighter than steel MC cable Cable reverse wound for ease of pulling and installation Conductors - solid bare annealed copper per ASTM B-3 stranded copper stran ding per ASTM B-8 for conductor Conductor insulation rated 90 degree Celsius dry 75 degrees Celsius wet at 600 volt Conductor insulation is flame retardant heat resistant PVC with flame