16-gauge wire is a type of electrical wire commonly used in various applications, including home wiring and automotive projects. The "gauge" refers to the thickness of the wire, with a lower number indicating a thicker wire. A 16-gauge wire has a diameter of approximately 1.29 millimeters, making it suitable for carrying moderate electrical loads. This wire is often used for connecting devices like light fixtures, speakers, and small appliances. It is flexible and easy to work with, making it a popular choice for DIY enthusiasts and professionals alike. Proper insulation is essential to ensure safety and prevent electrical shorts.