Compared with conventional junction boxes, explosion-proof junction boxes are modified electrical distribution boxes with explosion-proof functions. During use, electrical equipment must be connected to the power supply network through wires or cables to form a system to complete its use functions; however, its connecting wires or cables cannot be infinitely long, and there are many places where the wires need to be divided in series or parallel during the connection process. catch. This will inevitably cause partial exposure of the joints, which can easily lead to accidents.
Explosion-proof junction box products are products produced to solve such problems, in order to further ensure safe production.
Such products include: junction boxes, wiring boxes, hanging boxes, junction boxes and other products, the shells of which are mainly made of cast aluminum alloy. There are many incoming and outgoing wire introduction devices according to the needs, and the boxes are equipped with terminal blocks for connection or tapping. Most of these products are made of explosion-proof or increased safety types, with large and small sizes, and the explosion-proof level can reach IIC level.
Explosion-proof junction box manufacturers remind you of things to pay attention to before installation
Before installation, check whether the technical data on the nameplate is consistent with the actual use conditions;
Check whether all fasteners are loose and tighten them if they are loose;
The internal and external grounding of the junction box must be good and reliable;
During installation, the cable must be passed through the sealing ring and metal washer, and tightened with a compression nut to ensure that the seal and the cable are not loose. Unused wiring ports should be sealed with sealing rings and metal gaskets;
During maintenance and inspection, the power must be disconnected before the cover can be opened;
During installation, where the power cord and load are connected to the terminals in the cabinet, crimp wiring should be made on the lead end. It is strictly prohibited to use multi-strand wires for direct connection. Where the power cord and load are connected to the wiring terminals in the cabinet, crimp wiring should be made at the lead end. It is strictly prohibited to use multi-strand wires for direct connection.
Installation precautions
There are grounding installations inside and outside the casing, and grounding is required when installing an explosion-proof junction box.
The installation site must not exceed the requirements of the application site related to the use instructions, and the parts of the product must not be replaced independently.
The standard of "opening the watch cover after turning off the power supply" should be followed.
Select the appropriate nominal diameter of the sealing ring according to the diameter of the imported cable. The clamping nut should be tightened on site to seal the cable. The socket where the cable is not introduced should be sealed.