Pigtails (or twin tail or twintail) are a hairstyle of twin ponytails or braids on opposite sides of the head. Bedouin woman with braided pigtails, between 1898. Whether it's an electrical system in your car, home, or factory, the quality of the connection is essential, and that's where pigtail connectors come in. These small, often overlooked components ensure a strong, safe electrical connection. So, what exactly is a pigtail connector? Let's find out!A pigtail is a coiled or looped section of tubing used in piping and instrumentation systems to absorb vibration, manage thermal expansion, and protect pressure instruments from direct exposure to process media. People often make this connection in the field, where they must make temporary repairs or. Yet for many buyers, engineers, and procurement specialists, the question remains: What exactly is a pigtail connector, and why does it matter so much in modern design? A pigtail connector is a short, pre-terminated length of cable with one end connected to a connector and the other end left open. Pigtailing is the practice of connecting two or more electrical wires with a third short wire, which can then be connected to a terminal, such as an outlet. It's not just about adding more wires willy-nilly.