There are several ways to start. 1. Power According to the need to carry the size of the current or voltage, to choose the corresponding grade of terminal, and leave a certain space is the right terminal. 2. Space In a narrow space, need to choose a relatively small size of the terminal, the fixed method is the type of guide rail. The size of the terminal and the size of the guide rail will be larger than the size of the wiring space. You can only use other methods to fix the terminal. 3. Wiring size Different terminals, the size and range of wiring are not the same, the same terminals, different specifications will have different models. In general, when using terminals, you are advised to select a connection range slightly larger than the actual wire diameter. Because the current market standard is relatively confused, if you choose the same size and wire diameter of the wiring aperture, it may be because of the confusion of the standard, resulting in a smaller wiring range, the line can not be inserted into the wire frame. 4. Material Plastic parts should have good flame retardant, can be tested with open fire, if leave open fire is extinguished, it has good flame retardant performance. 5. Environment In high temperature environments, choose materials that can withstand high temperatures. When the moisture is large, should choose the sealing performance and moisture-proof performance of good materials. In acid and alkali environment, acid and alkali corrosion resistant materials are preferred. 6. Appearance
The overall appearance is relatively smooth, no deformation, no scratches, no burrs, the overall uniform thickness of the case, the quality is better.
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