Terminal Blocks Connector are intended specifically for use in making the internal connection between the power cord and the primary circuitry of the euipment. Three-wire terminal blocks provide connection points in single-phase applications with terminals for line, neutral, and ground. Five-wire terminal blocks are used in three-phase applications with terminals for three lines, neutral or common, and ground. Six-wire terminal blocks can be used in either single-phase or three-phase applications.  In a single-phase application, the 6-wire terminal block can be used to split power and deliver it to two different areas of the equipment, and in three-phase applications, the extra position could be used for connecting control signals or other extra circuit needs.

Terminal Block
The terminal block is where the wires are joined together to make electrical connections. The blocks are designed to fit where space is limited, such as inside a computer tower.

The different parts of the terminal are the insert, screw, and wire protector.

The insert is the place in the block where the wire is placed. It is located underneath each “chimney”.
The insert is made out of plated brass.
The screws are located in each chimney. The screws are steel, plated with a zinc and chrome finish. When the screws are tightened down on the wires, the electrical connections are enhanced by the
wire protectors.
The wire protectors are located inside of the insert underneath each screw. These wire protectors are made of stainless spring steel.
        
The body of the terminal block is molded out of a Polyamide 6. The blocks are able to withstand a continuous working temperature of 100°C (212°F) with a short-time temperature of 160°C (320°F).

The wire connection between the power cord and the terminal block is accomplished through the combination of the insert, wire protector, and screw. When clamping fine wires of small conductor sizes with a clamping screw, the China Connector Manufacturers’s wire protector is positioned between the screw and the wire. This prevents the conductor from being damaged.