Check the circuit board and the selection of accessories?

Peter asks:
I’m doing an electrician in an apartment, not a novice in this business, I just got confused in the RCD and in the components of the machines in their rated current. I want to connect each kitchen and 2 rooms through RCD. Everything is shown in the diagram. I think I was mistaken in choosing the rated current.

And they say you need each RCD to be connected via an automatic machine and each RCD must have its own zero, that is, a separate bus for each or all together can. And what is the best wire to throw on the stove and on the circuit 40A there is a stove and a socket automatically. And how much should the water machine be? And I apologize for the terrible scheme in a hurry did

Circuit board

The answer to the question:

No, just from each RCD, by convention, “its own zero” comes out, and it cannot be combined with the zeros of other RCDs or with zero from the input (the one that was before the RCD). Otherwise, all meaning is lost. Everything is fine with you, as it should be.

On sockets you can not put machines more than 16A.And it is not necessary that the RCDs are one step higher than the machines that are connected to them. Those. if the machine is 16A, then the RCD is enough for 16A. Leakage current not more than 30 mA.

Look at the current indicated on the sockets. Usually these are just 16A, less often 10A. And you have 25-40A. Otherwise, I do not see any problems.

The opening machine should be exactly as much as the power supply company allocates to you. You are not entitled to change its face value. There is such a thing as the allocated power of electricity.

 

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7 comments

  • Peter

    So if I have two sockets connected, one socket with 4 sockets and the other with two sockets and connected to the distribution box and then goes to the machine will it withstand 16A? So I read that the RCD should be more than a water machine at the rated current? Yes, and there’s a 50A water vending machine there’s a terrible thing to do to me that to do everything in 50A or you can lower the machine. Is it better to put a 32A automatic machine and 4.0 mm wire on the stove on the stove and oven or is it better to have more? And I heard and read, watched the video, they said the RCD should go along with the machine, well, how's the automatic machine? But only if it comes with an automatic machine, which automatic machine should I put. Sorry for so many questions.

    To answer
    • Admin

      Who can withstand 16A? Machine? if so, then do not plug in 16A loads into sockets, if you need to turn something on at these 4 + 2 sockets at the same time - divide into 2-3-4-5-6 separate lines to separate machines.
      And why exactly 4 mm²? according to SP 256.1325800.2016 “Electrical installations of residential and public buildings. Design and installation rules ”(current version of the joint venture 31.110) laid 6 mm² (paragraph 10.2 ...)

      The RCD must be connected either after the machine, or before it. If to one RCD groups, naturally all machines after it.

      And why didn’t I understand the reduction in the rating of the machine in the vestibule?

      RCDs are selected at the circuit-breaker rating that is connected to it in the group, it must be equal to or one step more ... That is, you put the machine on 16A on the sockets, then after it (or in front) we put the RCD on 16 or 25A

      To answer
      • Peter

        Thanks for the detailed explanation.Another question in the vestibule will be only the introductory machine; I want a counter and transfer everything else to the apartment. What wire to power from the input machine to the counter? Or is everything powered by the same wire?

        To answer
        • Admin

          Not by wire, but by cable, VVGNG-LS. 6 mm² should be enough. The rest must be considered current.

          To answer
          • Peter

            Sorry for the cable. Count current loads on the group?

          • Peter

            And one more question I will lay down a warm floor in a bath! Is it possible to connect it to the group in the bath to the washing machine and to the outlet. Dif machine 16A there

  • Admin

    Peter, if the machine can stand it, it’s possible. Or at the same time not to include.

    To answer

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