Alexander asks:
Good afternoon. The situation is the following - there is a desire to make an apartment shield with replacing the old wiring with a new one. In fact, only with laying a new one and turning off the old one. There are no powerful energy-consuming appliances in the apartment. At the moment, automatic devices are connected to the apartment in the floor shield from the meter - 25A to sockets, 25A to the stove, 16A to the lighting. We do the repair in the rooms one at a time, in one room we have already done the new wiring and temporarily connected it directly to the floor shield through the 16A machine. The plan subsequently is to change all the lines to sockets in the apartment and the light in the bathroom, leave the old wires and machines only to the light and stove.
So, I want to start the shield with the following - two circuit breakers on 16A for two outlet groups, one RCD on 40A, and put a load switch at the input of the shield. Outlets are wires with a cross section of 2.5 mm, of course.
The questions are as follows - is such a layout and combination of denominations adequate?
And where to lead the wire to the new apartment panel - directly from the meter to the input load switch or between them on the floor panel it makes sense to put the machine? If so, how to choose it?
The answer to the question:
Hello! Are these two machines from this 40A RCD connected? By the way, the RCD may not be necessary at 40A, do you have an introductory machine for how much? Or do you really want to remove it and leave the load switch? If so, then it’s better not to do this, the switch is certainly good, but it’s better if the machine is on the input - this is my personal opinion, you decide. The current of the RCD is sufficient to be equal to or a step greater than the input automaton, and not the sum of the currents of each of the automata fed from it. Choose by the link that limits all subsequent links.
Otherwise, if everything is as I understand it, then you are right, the normal layout is: INTRODUCTORY AUTOMATION-UZO-AUTOMATICS FOR 2 GROUPS OF SOCKETS.
We also considered this issue in the article - https://my.electricianexp.com/en/kak-sobrat-raspredelitelnyj-shhit.html
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Good afternoon.
Thanks for the answer!
Yes, I forgot to clarify that a 40 A machine was installed in front of the counter on the floor plate
After the counter, the new outlet group is currently protected by an automatic machine at 16 A. Accordingly, it will move to a new shield. Thus, do I understand correctly that, after the meter and before the knife switch of the apartment panel, I still need an automatic machine? If so, which denomination to choose? And, as I understand it, the RCD must correspond to the nominal value of this machine?
And still such a moment - how to figure out how many poles a knife switch should have in this case? Do I understand correctly that in this situation, in the presence of a single-phase network, a single-pole switch is enough?
Well, if you already have an automatic machine in front of the counter, then put the switch in the switchboard, as they wrote in your question. If there is grounding - it can be 4, if there is no grounding - 3, because PEN - do not tear.
Hello.Consult if possible. The sequence is as follows. At the entrance there is an introductory two-pole automatic machine 40A, then an accounting meter, after it there is a VD1-63 In 40A I ^ n 0.1A differential machine, then a VVGng-LS 3 * 6 cable goes to the apartment in the apartment in the UZM-51M 63A panel, Uzo sockets 40A 30Ma under this ouzo group of machines for indoor sockets 16A 4pcs. The RCD for the bathroom and the storage boiler costs 25A 30Ma after it, the automatic machines 16A for the boiler, 16A for the bathroom socket and 10A bathroom lighting. To the kitchen ouzo 40A 30Ma under this ouzo there are two 16A automatic machines for sockets and a 32A automatic machine for the stove. Is selectivity observed here and are the machines and ouzo correctly selected?