Butt terminal with solder

All we all know that there are several ways to connect the wires in the junction box, namely: crimping, soldering, welding or the use of squeezing (screw, bolt, etc...). All these options are spelled out in the PUE 7th edition, paragraph 2.1.21. and provide a reliable contact at the junction.

In particular, in order to carry out soldering, we need at least a soldering iron and solder, but progress is not in place and Gentlemen Chinese began offering special heat shrink tubing with an inner ring of the solder. In this article I'll show how to use these tubes, as well as talk about the strengths and weaknesses of such a compound.

The design of the connector

Structurally, the "innovation" connector is made of transparent heat-shrinkable tube, two thin rings of adhesive and the ring of fusible solder.

Revolutionary such construction name, of course, difficult, but the overall structure is designed to simplify and facilitate the wiring. Well, now let's test our connectors in the case.

Connect hard wires

Let's start our testing solid wires. For this purpose we clean both ends of the insulating layer 1 cm, insert them into the tube and produce heating the junction by means of a hair dryer construction:

Wherein heating is carried out from the central part, where the solder is melted as soon as it is heated by the remaining portion of heat shrink tubing, that such a compound prepared by:

It seems to get a reliable contact, but from a minimum of mechanical action soldering simply fell off.

Intermediate conclusion: for the connection of rigid conductors such method is not suitable without first twisting. You can of course pre zaludit ends of the wires, but then the fact of the use of these tubes with solder becomes meaningless. After all, if we have to tin the ends, we do not stop to put on the most simple shrink, solder connection and insulated shrink.

Compound of ductile wires

Now let's connect two stranded wires. To do this, just as we clean the insulation, as has become clear, can not do, so the pre-twist the two wires without first twisting as follows:

Then dress up the phone and perform the same warm-up operation and shrink tube. As a result, this has turned out here is the connection:

This compound is already more confidence and on a bend after a preliminary twist the junction normally bend.

Summarizing

A little work with such connectors, the following pros and cons of the connectors.

pros

The undoubted advantages include that the compound obtained is completely sealed, i.e. the external environmental exposure to the compound is excluded. So on this, perhaps, with the advantages of all, turn to the downside.

Minuses

Use these connectors without first twisting the wires can not be.

Connect more than two wires, the same is not possible.

Overheating of the solder may cause destruction of the tube itself.

The connection process is not fast, the same order of magnitude faster crimping.

By the way, the process of working with these connectors, you can see in this video:

conclusion

These connecting tubes are quite right to exist and find their unique supporters. But I personally such tubes will be used exclusively in low-voltage circuits (lighting, illumination, etc.), because with their help, it turns securely sealed connection. If you also want to try out these tubes, then I bought them in this store.

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