Compound wire clips of type "nut"

Piercing connectors (or on a professional slang "nut") is a fairly common type of connection wires when you want to make a branch from the main conductor without its rupture. In this article I will tell you where is mainly used are "nuts", and what are the advantages and disadvantages inherent in this type of connection. So, let's begin.

The design of the connector

So, let's find out the internal structure of the product, and finally understand why its so-called electricians. The outer shell is a dielectric body made of polycarbonate, tilting the latch and opened the body, we will see the "core" of our nuts. "Core" is the design of the nut of metal plates joined together by bolts.

In both plates, you can see the grooves, and that they are laid bare by the insulation of the wire. The magnitude of these slots is directly related to the fact on which the cross section is designed our TAPPING squeezing. The most common models and cross-section, for which they are given in the table below:

Such squeezing used in power networks up to 660 V inclusive.

How to connect the wires by means of compressing

In fact, the use of technology "nuts is extremely simple. To do this, dismantle the clamp itself, we clean the backbone core of the insulation for the length of our metal plates (more cleaned simply does not make sense), and remove the insulation from the other wire.

Then collect structure as follows:

Now we have to just thoroughly tighten the bolts, but do not overdo it (not to tear the thread). And back to put on the body.

Pros and cons of such a compound

Like any other type of connection squeezing "nut" has both strengths and weaknesses. So, to the advantages include the following:

pros

1. Connectivity aluminum and copper conductors. As used in the construction of compressing the brass spacer plate, then using the "nut" can be joined aluminum and copper wires. This partition plate does not allow to create a galvanic couple, which means that the connection will not be too hot.

2. Execution branches without breaking the trunk cable. This is the main advantage of this type of connection, because we do not tear the conductor to perform branch, but only remove a small layer of insulation. And at the same time get a reliable and secure connection that meets all the rules.

3. The simplicity and speed of installation. To perform such a connection requires a minimum set of tools, namely, a screwdriver, a knife for stripping himself "a nut."

4. The cheapness of the product. This, too, is an advantage.

By cons as such products may include the following:

Minuses

1. Housing nut made of a dielectric material with degree of protection IP20, which does not guarantee absolute hermetic sealing and therefore inwardly of such compound may well fall and dust and moisture. It is therefore desirable to use this type of compounds in a dry room with low dust content.

2. Installation of "nut" may be carried out only with the stress relieving. It can also be attributed to the shortcomings, as for secure mounting have to completely de-energize the workplace.

3. This clip can not be applied in the junction box of the significant size of the product.

It is, perhaps, all the advantages and disadvantages of compressing connection type "nut".

Where applicable, such clamps

Such compounds can be found, e.g., in switchboards of houses. Where is the backbone feeding lived and in order to ensure maximum reliability power supply, it does not break on each storey distribution board, and with the "nuts" is performed branch.

If this is not done, and pass the wire through the main terminal block, is thereby largely reduced consumer security of supply, that is, if due to poor contact on the terminal block power goes, for example, on the ground floor, all apartments The upstream, it is energized from this phase will de-energized.

A connection type "nut" completely eliminates this embodiment and ensures that if power goes in a distribution board, the rest will remain in normal operation.

conclusion

That's all I wanted to tell you about this kind of wiring such as "nut", if you liked this article, you will appreciate it. And thank you for your attention!