Wiring methods in junction box

There are a lot of reasons for the reworking of old house electrical systems. In particular, it concerns the reconstruction of the old housing stock. Aluminum wiring in two cores is prone to corrosion and spillage. The typical reason for such a condition is the very poor insulation of many Soviet cables. Chemically, aluminum is more active than copper (the main material of clean cables). But it is in its purest form. Aluminum in air is covered with a strong oxide film and, in theory, should be more durable. But when the sheath of insulation falls or water flows into it at a time when the wire is not energized - the wires are destroyed. The second factor is fire hazard. In some old houses the insulation is made of ... ordinary cloth. Which for decades, of course, decayed. The modern polymer sheath of cables is also much better than the worn-out Soviet decades.cambric.

Ordinary twisting of two wires

Methods of connecting wires in the junction box
The abundance of new methods of connection does not alter the usual twist at all. In conditions of extreme repair this is almost the only correct way out. The simplest curling of two wires, while respecting the approximate estimation of current (do not put a thin wire on a strong current) works almost always. But copper and aluminum are not allowed to be connected. They have relatively close resistance indicators, but copper is still smaller - and this creates an excellent thermocouple. The melting point of aluminum is slightly higher than six hundred degrees, therefore, such a twist is flammable a priori. Pros:everyone can do. There would be wires and hands. Cons:twisting is never airtight. Over time, the contact weakens, from poor contact, the resistance increases, the design begins to warm ... and then everything is as in the case of twisting copper with aluminum. That is why this method is prohibited by the rules of PUE.

Spiral with a propay

Methods of connecting wires in the junction box Trying to solve the problem of fragilecontact in terms of twist ordinary. Actually, mechanical twisting is performed, and then you need to solder the place of contact. Looking for a standard soldering iron, solder and flux.Solder- both ordinary tin-lead and newer variations. Flux can also be traditional rosin, and new synthetic resins. The method works very long and therefore beneficial for capital docking for many years. Minuses:all the charms of the "tin plague" or oxidized lead (depending on what was more in the solder). The propayka helps, of course, but more reliable methods of isolation are better. Boxes with diluted wiring are most often shoved under the ceiling, which is why the problem with soldering on weight with head thrown back is common. The problem of combining copper with aluminum is also not solved here at all.

Welding of wires

Wiring methods in a junction box
A new and popular method that installers are increasingly preferring. A compact inverter is taken, electrodes, after which the ends of the twist formed are caught. Fast, practical, no mess with solder, monolithic. Pros:Reliability.With a properly homogeneous seam, conductivity is simply excellent. Cons:Almost none. It is guaranteed that you will need a qualification of a welder. Whether it’s a minus is an individual matter. In general, the requirements for welding qualifications are much more than for simple work with an electrician.

Terminal blocks

Methods of connecting wires in the junction box
Terminals - this is quite a convenient and aesthetic connection. Simple assembly site will not require much effort and time. Pros:Simple, fast, without too much strain. You can connect wires of different metals. Cons:To connect a multicore wire, you first need to press it into a special tip. Do not connect more than two wires. Periodically it is necessary to check the connecting node.

Wago connection

Wiring methods in a junction box
Vagois a flat plastic box with an all-in-one concept. We clean the wire, as when twisting, insert into the clip-latch - ready. Fits a combination of any number of wires,There are so many varieties for different current strength and number of contacts. Ideal for quick installation of electrics. Pros:perfect sealing. Finally, you can connect copper with aluminum, you just need to follow the markings on the connectors. It is also possible to contact the conductors of different diameters, which is a plus in the installation of a “disparate” fleet of wires. Cons:Vago is expensive. It is very expensive. Vago boxes do not change anything, except for the same boxes, “on the knee” is not a priori. Therefore, this method of connection is used either with a very good budget for electrics, or when it is necessary to connect wires going to expensive electrical equipment.

Bolt connection

Wiring methods in the junction box
Full compliance with the original name. The bolt, nut and three washers provide a solid connection between two different wires. Selection of a bolt from the appropriate material makes the joint durable and in terms of electric shock. The main problem in this case is the size. A lot of things are used as a distribution box.From the shop boxes to the cans from the soluble Nescafe or tooth powder. But their fundamental property is one - the bolted joint does not climb there. Or it will fit, but then it will cling to the adjacent wiring and short. Therefore, it is better not to use this solution in the house where the junction box is to be hidden.

Crimping

Methods of connecting wires in the junction box
It is performed by a special device. Another type of almost perfect, but very time consuming docking options. However, this is more than offset by the highest insulating ability. Crimping is relatively inexpensive, the bulk of the payment - the work of a specialist. The above methods of connecting wiring are selected in full accordance with the strategy of repair or construction. In the ideal case, of course, it is better to drive everything into pressure testing or Wago, but in fact it usually turns out that such money for the electrical periphery is not mortgaged. In urgent circumstances, it is possible to use any type of connections, observing safety precautions and making high-quality electrical networks. All "temporary solutions" should be immediately reworked into capital as soon as possible.This will significantly improve fire safety at the facility, as well as improve the quality of power transmission with a decrease in current losses, which can result in substantial material savings.

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