A junction box, also known as a wire box or terminal box, is a closed container used to fix, protect and connect wires and cables. Fundamental Distinction: Terminal boxes utilize structured terminal blocks for organized, accessible connections and frequent maintenance, whereas junction boxes protect permanent wire splices and are rarely accessed after installation. Its main function is to facilitate the connection and disconnection of wires, while providing a transmission path for electrical signals. This guide breaks down the difference between terminal boxes and junction boxes. Whether you're a DIYer, an electrician, or an engineer, you'll learn which one fits your project best. They play an important role in a variety of applications, including domestic, commercial and industrial settings.