In general, there are two types of terminals used in industries: screw and pin/spring cage.
The screw type connection is time consuming and the screw mechanism limits the minimum physical size of a terminal, making screw terminals less useful where a large number of connections are required.
Spring cage-type or pin-type terminals are most commonly used. These types provide a vibration proof connection, high strength, easy installation, and good electrical conductivity according to IEC 60947. For these reasons, the pin/spring cage type is recommended for use in terminal boxes.