The correctness of the wiring in a wooden house

Sergei asks:
Hello, a self-supporting insulated wire is connected to the pediment to the pediment, from it there is a branch cable avvg 2 * 10 in the metal hose, laid along the pediment and goes into the log house on the first floor to the meter.

From the counter av-40a, then Uzo 63a 100 ma and (this is all in Met.box), and again in the metal hose, goes into the log house and along the pediment to the second floor to the switchboard diff 32 + 16 + 10 connected by a two-pole comb.

32 to the stove (6mm) 16 to the sockets (2.5mm) 10 to the light (1.5mm2) there is copper everywhere. Tell me, is everything done correctly: the choice of the cross section and the material of the conductors? And modular equipment?

The answer to the question:
Hello! I understand that this line is laid on a WOODEN pediment? If so, the use of a metal hose is doubtful. Firstly, it will decay quickly enough, and secondly, if you chose it from the point of view of fire safety, then this is a futile solution, since it does not have localization ability. What distance is kept from the pediment? According to chapter 2.1. PUE p. 2.1.3. between the cable in the sheath of combustible materials and the surface of combustible materials, a distance of at least 10 cm must be maintained. If you have a cable not just avvg, but with a prefix at the end of ng-LS, then laying directly on its surface is permissible ...

The machine was chosen correctly, but you did not specify its current characteristic, you need a class B or C machine, for example, the B40 machine will work faster in case of an emergency.

Dif was chosen at 32A to provide selectivity with an introductory? They did it right. The ratings on the stove, sockets and lights are also in principle normal, again, with regard to the current characteristics, everything is the same. Cross-sections of conductors also chose the right one!

You did not say anything about grounding. Do you have it? If not, it is highly advisable to do it, because according to the same PUE 1.7.80, the use of RCDs in 4 wire networks (TN-C system) is prohibited. This is due to the fact that if there is a current leakage through the human body, there is no guarantee that the RCD will work “as it should” and you will not get an electric shock.

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