UL1007 Copper Wire PVC Insulated Hook-Up Wire. The UL 1007 PVC hook-up wire is mainly used for the general purpose of the internal wiring of electronic and electrical equipment. Its characteristics include tinned copper conductors, Polyvinyl Chloride (PVC) insulation, and a 300 voltage rating. This makes the UL1007 wire suitable for applications in temperatures ranging from 80°C to 105°C.