Terminal blocks: electrical engineering in a series of combinations of fixed wiring installations. The number of terminal points of each row is different, according to the needs of the engineering parameters and to determine its type.

Definition: Power Electronics with wiring, where the screen connected equipment and offscreen equipment through specialized terminals, these terminals combined, then known as the terminal block.
    
The role of the terminal block is connecting to screen devices and equipment outside the line, play a role in the transmission of signals (current and voltage). With terminal block makes wiring and beautiful, easy to maintain, mainly solid connection between long-distance lines, construction and easy maintenance.
    
Terminal blocks, commonly used letters and numbers, or figures in the Chinese phonetic alphabet to indicate the terminal blocks access at the point current liquidity as well as terminal block size and the number of endpoints, but also used to indicate the factory series models of the product.