Renovating Block of Flats with Big Plate from '92: Electrical Wiring and Surface-Mounted Box

Question

Hello all, I have been given a property to renovate in a block of flats from the great plate from the year 92. As the budget is tight, I have to do some of the work myself, but I do not know how to go about it, whether to pull out the old wires, I do not even know how they go in the wall,...

pol102 · Accepted Answer

Everything can be done but it requires a site visit. Of course, that I can come up only there are two important things, everything costs money (knowledge especially) and there are no half-measures

If the investor can survive this, for only 500zl he can wire himself an apartment or a house. Is it worth it? A matter of attitude and attitude because even if it goes wrong it will still "work until it goes wrong".
Some people will knock their heads together and ask "so much money! For what?". I already rush to answer, knowledge is priceless.

retrofood · Answer

Take on the painting, tiling and cleaning yourself, and hire an electrician to do the installation.

excray · Answer

Exactly like that. Only in reverse order .

CYRUS2 · Answer

To give light,you need to go to the site and assess the situation, how it pays to do it

paulex80 · Answer

Detailedly yes, unless the photos help, I generally wanted to prepare the furrows and only that. Ideally I would like an electrician to look at it, plan and I will then prepare the furrows for example. I'm from Wroclaw, if you recommend some electrician then please priv., I'll write right away that the premises has very few meters, less than 20m2.

retrofood · Answer

How do you imagine the furrows in a large slab?

paulex80 · Answer

In plaster naturally.

retrofood · Answer

There is no plaster on the large slab.

mawerix123 · Answer

And what is You have the internet so google an electrician with a free date or not I will do it for you.... please --> unfortunately making an appointment you have to do yourself .

paulex80 · Answer

No Lord, I can do it too, I thought there would be some referral from the forum😉

retrofood · Answer

Under me there was only a layer of white emulsion, which could be painted any color.

paulex80 · Answer

And the electric cables were under the emulsion?

mawerix123 · Answer

I asked because not so long ago I was doing a block of slab plaster was on wires. Alu installation was fixed on gypsum cakes and the whole thing was covered with plaster with communist diligence..... "hey mountains and valleys"

I think it should not be assumed in advance that there is no plaster on the slab.
I have also encountered installation furrows in places, which Luke-O once mentioned in some topic and in them wires.

paulex80 · Answer

I will show a photo of the box: .

retrofood · Answer

If we are talking about a large slab, the conduits for cables were made at the slab production stage, as well as the holes for equipment boxes. Mounting furrows only in some places where partitions were made of pro-monta blocks. You can not talk about any plaster, only the joints of the boards were covered with it.Otherwise - it was not a great slab. This does not mean that the installation can not be done, but about easy should be forgotten.

mawerix123 · Answer

Of course I agree with this. The plaster on the great plate can be spoken of as the phase on the yellow-green wire, seemingly gone but encountered

CYRUS2 · Answer

You are right. Maybe some take a look at the fixtures for the big slab. Are these surface-mounted apparatuses ? On the socket for the big slab you can see how much plaster should be. Not every slab had grooves.

Łukasz-O · Answer

seemingly gone but meets

Good, you got it right

What about the big slab. You can't generalize, because as many great slabs as there were solutions, changing at the turn of the year.
There were slabs with furrows and holes made at the production stage, here an example for solid slabs:

This one shows the uncut factory cavities and the hole for the box:

Without the plaster you can see it better:

Depressions for sockets (surface-mounted):

In solid ceilings, expansion joints between tiles were used for overhead lighting, or cables were run under the spout of the neighbor one floor above.
Example of placing a new cable in the expansion joint, without disturbing the slab structure (along the old route):

In slabs with ducts, the installations were just stuffed into these ducts, so called.

and use for general outlets (by the way, the installation was run in the spout:

Very often after forging the old box, the neighbor's box appears to the eye:

Times, some structural components such as. complete bathroom cabins had factory-submerged PVC pipes into which wires were inserted at the construction stage:

Removal in a large slab is difficult but does not mean impossible.

CYRUS2 · Answer

If he wants to under plaster, he must: 1.Give thick plaster 2. Or forge furrows with SDS.

opornik7 · Answer

OWT was a specific method of block construction. I hope you understood Stach's words above. There is no option for forging in concrete slabs. End. Period.

elpapiotr · Answer

At one time I wrote about the systems of running the installation in the large slab.
Detailed was described how the installation in the apartments was made and run, but this "way" (the box in #14) I just do not know.
Some kind of freak. I wonder what it looks like inside.

paulex80 · Answer

This is the only box in the apartment that you can see, behind it on the obsolete is the corridor and the apartment's energy meter.

elpapiotr · Answer

But I asked about the interior of the box , not the meter and fuse board.

paulex80 · Answer

But this can I did not disassemble on Saturday I will look at it inside and make a photo documentation.

opornik7 · Answer

There were standard CPR cans in the OWT system. The box in the author's photo is some kind of hybrid WITH terminal strips probably inside. I'm also puzzled by her enclosure. I wonder if she was there from the beginning or someone built her in later. On the other hand, CPRs in OWT were not mounted under the ceiling. Hence, it makes me question whether it is OWT or someone along the way reworked the installation. Added after 1 [minute]: Footage desirable but remember safety when opening it because under the lid wonders can be.

Brivido · Answer

Sometimes and did not regret the plaster

And sometimes, as someone said it, you have to hide the wires under the emulsion
or in the screed

You can even see the neighbor's black wires here.

And Luke, well please, and I read on the electrode all the time that there is no problem to buy a 4x wire with a blue wire

.

opornik7 · Answer

The OWT outlet circuits were run in baseboards and the approaches to the ceiling lights were run in the neighbor's screed above Oh, that was the technology back then.

Łukasz-O · Answer

And do I write that there is a problem? There is no prohibition on using the gray conductor as a neutral - after it is marked, of course.

elpapiotr · Answer

Marker or tape, because I did not read (?).

Renovating Block of Flats with Big Plate from '92: Electrical Wiring and Surface-Mounted Box

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