Sherco Automotive & Marine Supplies Vinyl-insulated wire connectors are terminals that are used to connect, mate, or terminate electrical wire. The vinyl material acts as an economic insulation for professional electrical applications. Vinyl-insulated wire terminals are great for automotive & marine vehicles, and in other applications that utilize wire to transfer electrical current. – Vinyl-insulated wire connectors are the most economical insulated terminal available. – The PVC insulation sleeve is securely fastened to the barrel. – The Opening for our Vinyl Connectors have a flared entry for easy wire insertion. – Standard Industry color-coding indicates wire range. – Rated 600 volts maximum, building wire; 1000 volts maximum, signs and fixtures. – Temperature rating: 105 C (221 F).