Connection wires in the junction box

One of the important stages of wiring installation is the connection of wires in an electrical junction box, which follows immediately after the cable laying.Some at first glance it might seem that the use of terminal boxes for switching wires is essentially a waste of time, but this assumption is incorrect for several reasons.

scheme wiring in the junction box

Inthe operation of the wiring may malfunction - such as an open circuit occurred.If during wiring work done without junction box, and the joints were simply rolled finishing material such as plaster, then in order to again reach the compounds will have to break the finish - to break off the wallpaper, to break a layer of plaster, etc.It is unlikely that someone will arrange such prospects.If in the future need to install additional outlets, it is not always in such cases it is convenient to stretch wires from the previously established outlets, easier to organize a direct connection to the box.

If the wires are connected using terminal blocks, the wall will have to prodalblivat channel large enough depth that is much more labor-intensive than a simple wire connection to terminal boxes.

Finally, in terms of fire safety advantage of using distribution boxes indisputable.For proper organization of electrical work, there are special rules for Electrical Installation (PUE), which regulate the order and connection of cables.

Methods of wiring in the junction box

According to the rules (PUE), there are the following ways to connect the wires in the junction box:

• Connecting with terminal blocks is the most preferred method: terminal blocks are small andeasily placed in the junction box, and to buy them is not difficult.It remains only to cut the wire by a certain length, to connect the appropriate wires and put the resulting assembly in the box.
• Connection wires in the junction box soldering method - a method more suitable for professionals who have sufficient experience in carrying out such a procedure.Lacking experience, people will spend a lot of time on the solder, and not the fact that will result in a quality connection.
• Connecting wires in a box switchgear crimping method can be considered as the most reliable permanent link.However, it is quite time-consuming work that requires skills, the availability of special equipment and materials - is pressing tongs, copper or aluminum sleeves and shrink tubing.The pre-stripped wires should be inserted on both ends of the sleeve to the stop and crimp connection.Immediately prior to compression into one of the switched conductors should wear a shrink tube, and after crimping the sleeve to move the tube and heat it to the shrinkage temperature.

For those who first encounters with such a task as the connection of the wires in the junction box, photos and videos presented in this article will help as much as possible to visualize how the procedure is carried out in all ways listed above.

main dial in the box wiring elements - it's lamps and sockets, and the wire connection diagram in the terminal box will be different for them.For sockets require a simple connection of the wires by color.There will be three colors: phase (gray, brown or black), zero (blue or blue), earth (yellow with green stripe).There are no ground wire, then the cable is a two-core, and instead of three will be two colors.For luminaires with one-button switch is required in connection box only 2 wires: zero will be connected with a wire going directly to the lamp, and the phase will pass through the switch to a lamp.For chandeliers with 2 key switch only difference is that to the chandelier in this case from the switch will go to the wire 2, responsible for the different groups of bulbs, a zero will be common.

Video cable connections in the terminal box