Explosion-proof junction boxes are explosion-proof products used for wiring in special hazardous environments. They contain wiring terminals. Explosion-proof junction boxes are classified into two types according to their explosion-proof rating: IIB and IIC. They are also generally classified according to the number of terminals: straight-through, tee, four-way, angle, etc. If classified by the appearance of the top cover, explosion-proof junction boxes are divided into two types: flat-cover explosion-proof junction boxes and hanging-cover explosion-proof junction boxes.
Explosion-proof junction boxes are used in explosion-proof areas, primarily in buildings and frame structures, and for cable rerouting. Explosion-proof junction boxes are used for direct connections between conduits and surfaces; flexible conduits are used for connections between conduits and surfaces. When connecting explosion-proof junction boxes to thermocouples, RTDs, transmitters, etc., on-site surfaces, flexible metal conduits or flexible connectors should be used as protective conduits. Elbows are generally used at bends in explosion-proof junction boxes; explosion-proof junction boxes must be installed for every two 90° bends or when the straight length of the conduit exceeds 30m.
Many customers are confused about the differences between explosion-proof junction boxes, explosion-proof conduit boxes, and explosion-proof junction boxes. Here, the editor from an explosion-proof junction box manufacturer will explain the function of explosion-proof junction boxes: Explosion-proof junction boxes, explosion-proof conduit boxes, and explosion-proof junction boxes are all used as interfaces for connecting electrical wires during renovations. However, each has its own specific purpose. Below, I will explain the differences in their applications. 1. Function of explosion-proof junction boxes: Explosion-proof junction boxes are used to connect cables to equipment or components, and also for the transition between exposed and concealed conduits, as well as the transition between rigid and flexible conduits. 2. Function of explosion-proof junction boxes: Explosion-proof conduit boxes are used when the length of the conduit exceeds a certain limit, or when there are branching lines, or when there are too many bends in the conduit, making it inconvenient to thread the wires through the conduit. In this case, an explosion-proof junction box is needed. 3. Function of explosion-proof junction boxes: Explosion-proof junction boxes are the local connection points for power distribution and electrical equipment to external lines. This local connection requires a device to protect the lines, so a box is added here for protection. The interior of an explosion-proof junction box usually has a boundary terminal block or no terminals but connection terminals for switching devices. Under normal circumstances, this connection device can be disassembled.
