In general, lugs are fixed to cables and wires by inserting the conductor/s into the barrel (tube) of the device and then barrel is either crimped, soldered or welded onto the conductor for a firm and secure mechanical and electrical joint. The connecting end of the lug is then fastened to the connection point by means of a bolt, screw, or spring clip. Numerous sizes, configurations and material types are available to suit particular application while lug crimping is made.
The connector end of a cable lug is typically chosen for its compatibility to the terminal type. Fork type or U-shaped lugs are used for screw terminals; closed-ring or O-type lugs are used for bolt-on applications; and pin lugs are used for press-on terminals. A cable lug or crimping socket also serves as a cable-size reducer, thereby allowing thick cables to be attached to a connector with a smaller diameter.
Cable connectors for electrical use are made of electrical grade copper, aluminum, brass, and plated to optimize voltage transfer and inhibit metal oxidation as per the IS standard.
Cable lugs can be found on the wiring systems of automobiles, electrical boxes, control panels, generators, transformers, many durable goods, and for all electrical appliances.
Cable lugs help you to connect electricity properly with low voltage drop and less thermal heat generation to avoid accidentally and terminal burnout. It is very necessary to use right sq mm size of lug and proper crimping has to be done with the right suggested crimping tool.