Terminal boxes are used for reliable connection, branching and distribution of electrical wires. They are necessary to protect switching points from external influences and prevent short circuits, therefore they play a key role in the organization of the distribution network.
Types of terminal boxes
- According to the case material. Plastic models (PVC, polypropylene) are ordered for general indoor use. Metal (steel, aluminum) - for use in conditions of high mechanical loads, in switchboards on the street or in hazardous areas.
- By design. There are different products for indoor (concealed) wall mounting and outdoor (overhead) surface mounting.
How to choose a terminal box
When buying, consider the following points:
- The number of inputs and terminals. It is determined by the number of connected cables. It is important to provide a margin for possible system expansion.
- Degree of protection. IP20 is sufficient for dry rooms, IP44 for bathrooms, and IP65 for outdoor use.
- Rated current and voltage. The characteristics must correspond to the parameters of the electrical circuit (especially when working with a power load).
The use of terminal boxes structures the wiring, making it easier to diagnose and modify the circuit. They also provide a high level of safety by isolating the live parts.
The high-quality terminal box protects the connections from dust, moisture and mechanical damage. This directly increases the durability of the entire installation.
Installation and maintenance recommendations
Before installation, the line must be de-energized. The housing must be securely fastened. When installing cables, it is necessary to use oil seals or sealing inserts to maintain the degree of protection. Inside the box, the wires should be connected to the terminals and the clamp should be fixed with the recommended force, avoiding damage to the wires.
Maintenance of the terminal boxes consists of periodic visual inspection for the absence of damage to the housing and signs of overheating (darkening, odor). Any work inside the box is carried out only when the distribution network is completely disconnected.
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Products from the group «Terminal boxes» you can buy wholesale and retail.