14-gauge wire is a type of electrical wire commonly used in residential and commercial wiring projects. The "gauge" refers to the thickness of the wire, with lower numbers indicating thicker wire. A 14-gauge wire is typically used for circuits that require a maximum of 15 amps, making it suitable for lighting and receptacle circuits. This wire is made of copper or aluminum and is insulated to prevent electrical shock and short circuits. It is flexible and easy to work with, making it a popular choice for DIY projects and professional electricians alike. Proper use of 14-gauge wire ensures safety and efficiency in electrical systems.