What is terminal block? Actually it is a piece of metal enclosed in insulating plastic. There are holes for us to insert wires. We can use screws for fastening or loosening. For example, two wires need to be connected sometimes and sometimes disconnected. You can use terminals to connect them at any time, and they can be disconnected at any time without having to weld or twist them together, which is very convenient and quick. And it is suitable for a large number of wire interconnections. In the electric power industry, there are special terminal blocks and terminal boxes, which are all connected terminals, single-layer, double-layer, current, voltage etc. A certain crimping area is to ensure reliable contact and to ensure that sufficient current can pass. Terminals are used to facilitate the connection of wires and are used as an accessory product for electrical connection.