The 784133-BK005 is a single-conductor hook-up wire designed for the internal wiring of electrical and electronic equipment. It is constructed with a 4 AWG tinned copper conductor with 133(7x19)/25 stranding and a nominal diameter of 0.269 inches. The conductor is insulated with a 0.063-inch wall of PVC, resulting in an overall nominal diameter of 0.395 inches. This wire is rated for 600 VRMS and has a wide operating temperature range of -40°C to 105°C. Compliant with multiple UL (MTW, THW, AWM 1283/1232) and CSA (TEW-105) standards, it is a reliable choice for various general-purpose applications.