The electrical wiring in the building is generally concealed, there is a switch to install the switch need a box, that is, the switch box, the role of the switch box is to install the switch (fixed), the second is to wire the switch, then, the switch box is also called the junction box, the box is not installed with switches, sockets, only the cover plate, it can only be called the junction box. The line needs to be branched, and the pipe turns too much to facilitate the threading, so it is necessary to install the junction box. Many people think that the switch box is the junction box, but in fact, there is a difference between the junction box and the switch box:
1. Different application scenarios
(1) The junction box is the length of the pipeline in the electrical piping line, when the distance and the number of elbows of the pipeline exceed the specified in the specification and when the pipeline has branches, the transition box that must be set, and the box reserved for the pipeline to the load terminal are all junction boxes. Its function is to facilitate threading, splitting and transition wiring.
(2) The switch box is the terminal bottom box of the switch, which is used when installing the switch.
2. The quota sub-items are different
Although the junction box and switch box belong to the auxiliary materials in the electrical installation project, they do belong to the unpriced main materials in the separate junction box and switch box installation quota subheading, and the unit price of the main material needs to be entered.
