Proper connection of the wires in the junction box - methods and tips

Any wiring diagram contains some compounds, branching wires or cables.Even people far from electrical engineering, knows that in his apartment, in every room, a wallpaper or plaster are special boxes, which connect electrical wires.They are called "dyuzovye".They are round, made of a polymeric material and closed with a lid.Places them under the ceiling (20 cm below).That's understand why they do need, and how to connect the wires in the junction box.

Why junction box

quite common for a disregard for the junction box.Some believe that its use in wiring - a waste of time.After all, it must also be mounted on the surface, and this extra effort.It is much easier, for example, twist wire, insulate the connection and "roll" all the plaster.But it overlooked some questions:

1. free access must be ensured in the process of exploitation to the places of wire connections.For example, if in some room there is no light or socket is not working?The audit showed that the reason - in the absence of voltage.How to find the faulty circuit portion?CUT wallpaper, plaster crashing to gain access to the twisting of wires?
2. If in the future you will need, for example, put an additional one (two, three) outlet.Connect them "in parallel" from the first?And whether it's always handy?While connect the new wires to the junction box were not working;
3. Proper wiring - using the terminal connectors.What kind of depth you need to hammer away "channel" in the wall to hide to the terminals?
4. In terms of fire safety advantage of this box is undeniable.

Methods wiring

1. With terminal blocks.This method is most preferred in every respect.These terminal blocks are sold everywhere, and they are "penny".With its small size, it can easily fit in a junction box.On the terminal board is up to twenty pairs of contacts.The very shoes made of soft "plastic", so you just need to cut the required amount of steam and connect the wires, placing the assembly in a box.We need to think about the future and leave a couple more - three free contacts.Useful ever;
2. Soldering wires.This is problematic, and it is unlikely that a person with no experience in such matters, able to qualitatively carry out such work.Especially when it comes to aluminum wires.And the time it will take quite a lot, and uncomfortable to work under the ceiling.Therefore, this method is more professional.Personally, I have always enjoyed the terminal connections - it is a reliable and convenient;
3. Twisting wires.A simpler way than soldering, but less suitable.Firstly, if unreliable twist, the wires can spark.And that can happen on only one spark, everyone knows;
4. pressurization.Quite a troublesome task which requires the purchase of heat shrink tubing, special casings, and experience too.

All methods other than the use of terminals, require insulation of the wires.For this special sleeves are used, which are placed on the twist.Although some "specialists" isolate normal tape.Again - it's "lover", the difference between the special sleeve and a good insulating tape in a residential area is small.