We produce machine connection in the distribution box correctly

All of us sooner or later faced with the need to change the machine (or put a new one) in the control panel. It is quite a demanding job and requires strict adherence to all the rules and requirements. This work can be left to professionals or if you have a desire and a basic set of technical knowledge to perform independently. In this article I will tell you about the basic requirements and the most common installation errors.

How to connect the machine power - from the top or from the bottom

I decided to start from that point, because I think its most important aspect. Since any machine has two outputs - a contact for connecting the wires. One of them is fixed and the other non-fixed.

In this issue we will focus solely on regulations rather than the authoritative opinions of Electrical guru.

open the PUE publication under № 7, namely 3.1.6., Where it is clearly spelled out: in the case of a unilateral power supply wire connection to the circuit breaker It must be carried out, as a rule, to the fixed contacts.

So let's just analyze the phrase - "usually". IN PUE and a transcript of this sentence, the judges can be found in paragraph 1.1.17. Where does it say that the demand "usually" is predominant and deviation from the requirements only in the case reasoned studies.

So, now it is necessary to understand where on this machine, unfixed or fixed contact. For this purpose, we look closely at the circuit printed on the machine and the internal structure thereof.

As seen from the above presented examples, the vast majority of machines, the fixed contact is placed on top machine, but it is worth noting that in the case of "kitayschiny", there is no guarantee that will be the same location contacts. So be careful.

Dear readers, predicting possible objections, I will say that in the course of that most modern machines no fundamental difference comes from food, but in order to avoid possible confusion in the future adhere to SAE requirements. And deviate only if it is impossible to do the washing from the top. In this case, be sure to make a mark in the distribution board. But we go further

Connecting solid wire

Contact with the insulation in place the clamping contact

It seems to be very simple: clean up - stuck - tightened. But there may be faced with such unpleasant situation, when the vein has been emptied and insufficient contact of tightening insulating material came into the clamp.

It threatens the fact that the contact will be weak, and in this place will be heated, the aforesaid can then bring to the fire.

Therefore, be careful to live was tipped enough and dragged on a bare piece of wire.

Tightening at a clip of wires of different cross sections

Sometimes you need to connect once a group of automata. Ideally, of course, to use a special comb. But it does not all have available. In this case, there is a fairly simple way to fulfill jumper from the standard pieces of wire.

So in this case, remember that the jumper must be made of wires of the same cross-section as the power cord, as it is impossible for one clip put wires of different diameters. In this case, the thicker core is tightened well and fine but a little grab and does not provide a reliable contact, which leads here to this:

Formation of the bare ends

Probably in 90 cases out of 100 Electrician just clean up the wire and insert it into the machine for tightening and there is no error here, all right. But I would still recommend you to upgrade a little connection here is as follows:

This will increase the contact area of ​​the wire and the clip, and hence further increase the reliability of the connection.

Connecting stranded wires

Prior to this, we are considering only the hard-core wire. And what to do if you want to make it automatic for flexible wire, such as PX-3.

Some electricians may allow such a mistake, as the connection of the wire without termination, which leads to such consequences here

Thus, the vein was transferred by and breaks, and this leads to a reduction in cross-section and weakening the contact. Therefore, in this case it is necessary to use special nozzles or brand NSHV NSHVI same.

If there is a need to connect two wires under one terminal that will come in handy here NSHVI special tip-2.

Pike under the clamp

And at the end of the article I want to tell you about such a moment as soldering by machine clamps. I understand that in order to save we are ready with you to go very far, and instead of buying small things special you may be tempted to take the path of least resistance and simply just to solder the ends wires. And do it categorically inadmissible and this is why.

The thing is that the tinned wire is clamped in the machine over time, so to speak, "floats", and that this does not allow to maintain contact and maximum reliability, it is necessary to periodically stretching. But in reality, few people do, it means that the ration will begin to warm up, which will lead to the final solder leakage and how consequently full contact burnout.

Therefore, to apply solder prohibited.

That's all I wanted to tell you about the details of the connection of automatic machine. Thanks for attention.

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