The difference between threading box, junction box and junction box

Threading box:

If the laying length of the line pipeline exceeds a certain limit, or the line is divergent, or there are many turns, it is inconvenient to thread the whole pipe. The additional box in the middle is called a threading box, and the internal wires are not connected to the equipment. The wires inside are not connected to electrical equipment. Lines and lines are not connected, just a whole line. This explosion-proof is used a lot.

Junction Box:

Used to connect pipelines and equipment, devices, or light and dark pipeline transitions, rigid and flexible transitions; used in pipeline wiring, corners, branched line-to-line connections, where line terminals and electrical equipment are connected. There are terminals inside for wiring.

Junction box:

At the connection between power distribution and electrical equipment and external lines, the box is used as protection, and there are generally terminal blocks and terminal blocks inside, which are only used for wiring. Or there is no terminal but there is a connection end of a switch device, this connection is detachable; there is a switch device on the top, and a lot of terminal blocks on the bottom, which is called a distribution box in a broad sense.