What are the installation methods of WAGO 221 terminal blocks? There are mainly the following installation methods for WAGO 221 terminal blocks: **Installation with independent wire connection**: First, use a tool such as a wire stripper to strip the outer skin of the wire to expose the metal wire of the appropriate length. Then turn the orange operating handle of the WAGO 221 terminal block to the vertical locking position, and the wire entry hole will be fully opened. Then insert the stripped wire into the wire hole of the terminal according to the corresponding line requirements, ensuring that the wire core and the center line of the wire hole of the terminal are aligned as much as possible and inserted to the bottom. Finally, turn the handle back to its original position to complete the connection between the wire and the terminal block. After closing the terminal block, check whether the connection is firm. **Installation using a fixed bracket**: Select a fixed bracket that matches the WAGO 221 terminal block. Generally, one fixed bracket can fix up to 5 terminal blocks. Place the terminal block in the corresponding position of the fixed bracket for fixing. The fixed terminal block can still perform wiring operations normally, whether it is inserting the wire directly into the terminal block or completing the wiring by opening the handle. The use of a fixing bracket can firmly fix the terminal block and the connected wires on the panel. It is suitable for scenes such as billboards, electrical cabinets and large mechanical equipment. It can reduce the impact of factors such as bumps during transportation and installation on the terminal block and wires, increase the neatness and beauty of the internal circuit, and facilitate later changes to the circuit and maintenance. **Installation in a small space**: Due to the small size of the WAGO 221 series, in some environments with limited space, such as when the internal space of the junction box is relatively narrow, the installer can also install the wired connector more conveniently and quickly, and there is no need to worry about damaging the wires and connectors. Just follow the normal operating steps and pull the operating handle to insert and fix the wires to complete the installation. ### The following are the more popular models of Wago 221: [221-412](https://www.cwlyautomation.com/product/59.html "221-412"): One-input and one-output terminal block, rated voltage 450V, rated current 32A, suitable for simple line connection in various scenarios, often used for internal wiring of lamps, small appliances and other equipment, as well as circuit connection in home decoration, etc., because of its wide application scenarios and strong versatility, so the sales volume is good. [221-413](https://www.cwlyautomation.com/product/5658.html "221-413"): One-input and two-output design can divide one circuit into two, which is convenient for connecting branch lines. The same rated voltage 450V, rated current 32A, is used more in some occasions where line distribution is required, such as internal wiring of distribution boxes, control cabinets, etc. [221-415](https://www.cwlyautomation.com/product/5656.html "221-415"): One-input and four-output, can meet the needs of distributing one signal or power supply to four channels, suitable for circuit systems that require more branches, often used in some small industrial control systems, smart home systems, etc., to facilitate power supply or signal transmission for multiple devices or modules. [221-2411](https://www.cwlyautomation.com/product/6600.html "221-2411"): Straight-through terminal block, which can connect two wires, is suitable for connecting high-power equipment and can pass large current. It is often used in building electrical, power equipment and other fields, where high-current wire connection is required. [221-612](https://www.cwlyautomation.com/product/5657.html "221-612"): One-input and one-output high-power model, rated voltage 450V, rated current 41A, can be used in occasions that need to carry higher currents, such as power supply lines for large motors and industrial equipment. [221-613](https://www.cwlyautomation.com/product/5655.html "221-613"): One-input and two-output high-power terminal block, suitable for branching high-power circuits, and is often used in some industrial sites with high requirements for power distribution or electrical systems of large buildings.