The best pigtail for your needs depends on whether you're working with copper wiring or fiber optics, and selecting the right type—such as SC, LC, or ST for fiber, or insulated vs. uninsulated for electrical—ensures reliable performance 1. A reliable pigtail connector electrical choice protects every project from hazards. He compares options, checks wire gauge, and reviews ratings. So, what exactly is a pigtail connector? Let's find out!An electrical pigtail connector is a short length of wire — pre-terminated on one or both ends — used to extend, repair, or adapt a wiring connection. Using the right pigtail ensures that current flows safely and reliably without stressing the delicate terminals of outlets or. Pigtail connectors are a safe and professional method for joining circuit wires to a device like an outlet or switch.