There are basically three types of lugs: Plain Type. Mechanical Lugs. Mechanical lugs are available bolted with two screws or with four screws. Compression Lugs. Compression lugs are stud-type input power connection that are generally made of high conduction wrought copper or aluminum. Grounding Lugs.
Cable lugs make installation, repair and maintenance of electrical devices and cables simple. They link two wires together or connect more than two cables. They also connect fuse sockets, load switches, and electrical equipment.
Lug: An electrical connector that incorporates a wire crimp connection and a bolted stud hole connection for use in a heavy duty electrical power or grounding application. They are ordinarily made of a conductive material like copper, brass, or aluminum and are usually uninsulated.