What is a junction box and what is it from?
Perhaps it is difficult to overestimate the importance of the junction box. Thanks to the box, convenience is provided in the process itself and in the repair of electrical wiring. In addition, as already mentioned, it performs the distribution of the load from all consumers in the room. The electric junction box contributes to streamlining and makes it possible to add all the new branches of the electrical network, without cardinal intervention in the already existing wiring.
In its appearance, the electric junction box represents a plastic or metal housing to which everyone without exceptions are supplied. It is divided into two types: overlaid or embedded in the wall. Each of them is equipped with special terminals, which makes a reliable and fast wire connection.
This variant of the camshaft device allows you to connect wires made from different materials. The box allows you to combine even compatible materials, such as aluminum and copper, which are oxidized when contact with each other. Over time, such contact disappears and ceases to work any of the consumers. The box shape is also divided into two types: square and round. All of them have different sizes.
Installing the junction box with your own hands
The device of the invoice box is simply simply, it is attached to the wall with a dowel. But the installation of an embedded junction box will require some effort and skills. It will be necessary to create a special landing space for it. As high as possible, it is desirable under the most ceiling, a niche is selected in the wall, into which the box is installed, while the alabaster or cement is used.
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However, this applies to the last stage of the work, at first it should be done by the device of the launcher, for which the wires will be supplied to the box. The existing gap can be used strictly vertically to the electrical sockets and switches, which can be used to install horizontal wiring, running between ceilings and wall plates.
After the device is completed and the installation of the submersionists is completed, it is necessary to start directly to the installation of electrical wiring, and the installation of the junction box is an integral part of the work carried out.
You should not forget one important detail. So that when connecting wires in the box, it does not have difficulty, the end of each wire coming from it should be signed. Only led the wire that feeds the electrical shield and immediately signed it "input". Love the wire from the outlets and signed again. In this case, each individual chain that connects to the distribution box should be signed separately, in this case, you definitely do not confuse with the connection of the wires.
During the time the question of the device of the junction box, we will deal with what cross sections are used when installing electrical wiring. From the shield located in the apartment in each room, the electrical voltage is served on two and three-cable wire, its cross section should not be less than 4 squares. This cable is able to withstand any, quite powerful consumer. In this case, the sockets are connected using a wire having a cross section of 2.5 square, and 1.5 square lighting devices.
Verify the correct cross section of the wire, collecting the electrical wiring, proceed to the completion of the installation of the junction box, perform switching in it all the necessary wires.
The work is quite complicated at first glance, it is easy enough to be inserted into the installation process, to understand the principle of operation of the wiring. In stock We have many wires and input to connect them. Entering is two or three wires that differ in color. According to one of them, the phase is supplied, otherwise "zero", the third is intended for grounding. Similarly, the wires to switches and sockets are summed up.
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In general, the wire connection mechanism is now clear: "zero" to "nolo", phase to phase, grounding to grounding. When connecting the wires to outlets, no difficulties do not occur at all, you only need to connect the wires by colors. A little different is the case with connecting lighting. In this case, going to the switch the outgoing phase is attached to the phase of the lighting circuit, and the "zero" of the entrance to the "nulo" lighting.
One of the most important points in the electrical junction box is a reliable and high-quality connection to them with each other. If during installation work, a communication box is used, equipped with terminals, the situation is easier. It is only worth inserting the wires and hold down the rigging screws. But in the case when the box of the box does not imply the use of special terminals, the wires must be soldered. This is done in this way - first the wires are twisted with pliers among themselves, after which the rosin or other special solder, as well as the tin soldiers. If there is a large-scale installation of wiring, then electric welding is used for high-quality wire connection.
This can be assumed that all work on the installation of the electric junction box is completed. All cooked or paled electrical wires are placed in the junction box, then it closes. Calculated for subsequent repairs, it should not be covered tightly into the wall, it will be better to make it more accessible that, if necessary, you could have free access to it.