What will you do if someone built a house on a foundation slab? Foundation earth electrode completely insulated from earth with polyester XPS. The house does not have a lightning protection system, so you do not need a ring earth electrode and connecting both earth electrodes. TN-C connected to the switchgear. Is the PE rail (PEN) to be earthed to a foundation earth electrode isolated from earth?
Can I run a 16 mm2 copper cable from the box and connect it with a hoop iron in the ground outside the building, and the cable must be placed on the spout under the polystyrene ...
This can be done, but the connection is then at ground level. There are special cans for this purpose. Link However, the cable should be placed in the pipe reaching the outside of the box. The connection had to be protected against corrosion. Self-amalgamating tape can be used. It should be remembered that the earth electrode should be placed on the GSW where the equipotential bonding starts, and this rail should be connected with the PE rail in the main board.
Do you need to use a special tube or a simple sheath?
Please also answer whether the vicinity of the connection cable, as shown in the first drawing of the earth electrode, does not disturb or have a negative effect?
... is the vicinity of the connection cable, as shown in the first drawing of the earth electrode, not disturbing and not adversely affected?
And what kind of threats do you expect? Moreover, this cable does not have to be laid together with the power cable. The figure shows that there is another (shorter) one to connect to the wrapper. The question remains, however, where the equalizing rail will be located
And what threats do you expect? Moreover, this cable does not have to be laid together with the power cable. The figure shows that there is another (shorter) one to connect to the wrapper. The question remains, however, where the equalizing rail will be located
I think there will be no threats ... but I would like to protect myself against a lightning strike in a transformer or a pole, do what I can but reasonably in the topic of home electric security and sleep soundly
1. a 16mm2 copper cable connected to the ground with the hoop 2. I will lead the other end of the cable inside the building (by hiding it behind the foundation polystyrene, further through the hole in the wall at a height of 0.5 m above the ground) where the GSW will be on the wall inside (i.e. a boiler room with a heat pump) 3.From GSW I will lead out a 16 mm2 copper cable in an additional pipe sheath on the concrete screed under the floor polystyrene and lead it to the PE rail in the fuse box inside the building (the distance between the GSW and the PE rail of the box is 4m) 4. put a protector in the fuse box and connect it to the PE rail 5. There will be a power cable next to the PE cable
I wrote a little complicated ... I think that when I do not have foundation grounding, I will use a hoop earth electrode
I would install the arrester in any other place, but not in the same switchgear as the rest of the equipment. Anyone else have these famous photos of wardrobe remnants after the explosion of the protector?
I would install the arrester in any other place, but not in the same switchgear as the rest of the equipment. Anyone else have these famous photos of wardrobe remnants after the explosion of the protector?
The arrestor must be installed in the right one and not in another cabinet. Exploding crap from a few zlotys will not protect the installation against overvoltage and discharges, so I do not see any sense in installing it in a switchgear or in a separate pool.
1. a 16mm2 copper cable connected to the ground with the hoop
Not buddy. You cannot connect a hoop with copper underground. The hoop should be led to either the wall or to the ground level and the connection should be made in a suitable box / box.
Quote:
... I would like to protect myself against a lightning strike in a transformer or a pole, do what I can but be reasonable in the subject of home electric security and sleep well.
After all, when something like this occurs, it is Twa wlz that will introduce increased voltage to the building, not the earth electrode.
Quote:
from GSW I will lead out a 16 mm2 copper cable in an additional pipe sheath on the concrete screed under the floor foamed polystyrene and lead it to the PE rail in the fuse box ...
GSW is to be connected to the earth electrode and to the PE rail in the table. If it is connected only to PE, it becomes the beginning of local equalizing connections, i.e. MSW.
Quote:
... I do not have foundation grounding ...
And this, as you can see, is a mistake and you have to bear additional costs.
1. a 16mm2 copper cable connected to the ground with the hoop 2.The other end of the cable will be led inside the building (by hiding it behind the foundation polystyrene, further through the hole in the wall at a height of 0.5 m above the ground) where the GSW will be on the wall inside (i.e. a boiler room with a heat pump) 3.From GSW I will lead out a 16 mm2 copper cable in an additional pipe sheath on the concrete screed under the floor polystyrene and lead it to the PE rail in the fuse box inside the building (the distance between the GSW and the PE rail of the box is 4m) 4. put a protector in the fuse box and connect it to the PE rail 5. There will be a power cable next to the PE cable
If it is to be a cable / wire from the earth electrode to the GSU / GSW, it should be flat and not round. Read on why. I would still use a cooper 50 mm ^ 2, steel 100 mm ^ 2. GSU should be as close as possible to the switchgear so that the cable from SPD to GSU is as short as possible ? 0.5 m, ? 1 m (V system).
Here you have a properly seated GSU https://www.youtube.com/watch?v=WuYi5VyGeWo Only a guest instead of giving the SPD downstairs, as close to the GSU as he gave it upstairs. As WLZ reaches the switchgear from the bottom, start "building" the switchgear also from the bottom. In order not to pull the WLZ up through the entire switchgear. Same cable from SPD to GSU. At the bottom, WLZ directly on the FR. Next to the SPD, etc. The first DIN rail to be called "technical". The WLZ and the ground wire from the SPD will not come into contact with the conductors of the sockets, etc.
Not buddy. You cannot connect a hoop with copper underground. The hoop should be led to either the wall or to the ground level and the connection should be made in a suitable box / box.
Okay, I understand, you threw me a line with such a ground can
kkas12 wrote:
GSW is to be connected to the earth electrode and to the PE rail in the table. If it is connected only to PE, it becomes the beginning of local equalizing connections, i.e. MSW.
i.e. in my case it will be so that I put the hoop connected with the rim on the wall inside the building, specifically in the boiler room, then connect the hoop iron with the PE rail in the main switchboard with a 16 mm2 copper cable.
The connection with the mentioned copper cable between the hoop iron and PE is about 4m because the box is not placed in the boiler room but in the next room. In the main switchboard I put a protector and a link to the PE bus, please give your opinion whether it is acceptable, thank you !! :-)
(2nd option: instead of connecting with a copper cable, I can pull the hoop, of course, under the floor polystyrene to the RG)
Added after 22 [minutes]:
emigrant wrote:
If it is to be a cable / wire from the earth electrode to the GSU / GSW, it should be flat and not round. Read on why. I would still use a cooper 50 mm ^ 2, steel 100 mm ^ 2. GSU should be as close as possible to the switchgear so that the cable from SPD to GSU is as short as possible ? 0.5 m, ? 1 m (V system).
okay, we assume that I used a cordage instead of the aforementioned copper cable. From the point of connection with the rim to the main switchboard, I have 4 m inside and, along this length, I put the hoop on the concrete floor under the foamed polystyrene. Then at the end I lead the hoop from under the floor in front of the switchboard.
Bednarka is "bare" without insulation under polystyrene, will it not be an obstacle? would it be better if there was an insulated cable? I understand that SPD is better to connect directly to the hoop? than to the PE rail? of course, the PE rail is connected to the hoop. I think this is how this youtube video shows?
thanks a lot for the discussion, please reply and best regards
Added after 20 [minutes]:
emigrant wrote:
Here you have a properly seated GSU https://www.youtube.com/watch?v=WuYi5VyGeWo Only a guest instead of giving the SPD downstairs, as close to the GSU as he gave it upstairs. As WLZ reaches the switchgear from the bottom, start "building" the switchgear also from the bottom. In order not to pull the WLZ up through the entire switchgear. Same cable from SPD to GSU. At the bottom, WLZ directly on the FR. Next to the SPD, etc. The first DIN rail to be called "technical". The WLZ and the ground wire from the SPD will not come into contact with the conductors of the sockets, etc.
thank you for your answer and help, pleasefor information about the youtube video, is the division of PEN into N and PE on the top rails of the box? and shouldn't PE and N be split in a separate can? hymm or otherwise maybe the division is already done and in that case is it reasonable to connect the N and PE bus?
From the point of connection with the rim to the main switchboard, I have 4 m inside and, along this length, I put the hoop on the concrete floor under the foamed polystyrene. Then at the end I lead the hoop from under the floor in front of the switchboard.
This is exactly what you are supposed to do. Coating from the earth electrode directly to the switchgear. You end with a grounding bar right next to the switchboard. You can just like in the video.
elektro_dom wrote:
Bednarka is "bare" without insulation under polystyrene, will it not be an obstacle? would it be better if there was an insulated cable?
No circular conductor / cable. There is to be a cooperage. Then put a heat-shrinkable T-shirt on the rope and weld it.
elektro_dom wrote:
I understand that SPD is better to connect directly to the hoop? than to the PE rail? of course, the PE rail is connected to the hoop. I think this is how this youtube video shows?
Depends on the design of the SPD. When you buy a "normal" SPD T1 + T2 and not a dummy, you will have 2 terminals, one from PE and the other from ground. The one from earthing is to have the shortest way to the hoop. Therefore, the GSU is best installed next to the switchgear.
elektro_dom wrote:
is the division of PEN into N and PE on the upper rails of the box? and shouldn't PE and N be split in a separate can?
Yes, this guy's breakdown is done in the switchboard. The PEN was connected to the PE rail and the N was separated. A bridge between PE and N. There is no need to split up in a separate "can".
Why do you need some chapters in RG? You have WLZ 5x in your project ...
It always seemed to me that GSW, as the name suggests, is installed where the main equalizing connections are made, not under the switchgear. If there are no equipotential bonding and it will only be a connection between the hoop and the conductor, we are dealing with a control joint and not with an equipotential bonding bar. And if so, why place this joint inside the building if it can be outside on the facade or at ground level?
And butter is leading out two green-yellow wires from the board. One connecting the PE rail with the hoop and the other protector also with the hoop. For what?
One connecting the PE rail with the hoop and the other protector also with the hoop. For what?
So that such a connection is safe and as short as possible between SPD and GSU. Sometimes a larger conductor cross-section is recommended for this SPD ribbon connection. For me, thanks to the double PE / ground clamp in the SPD, I was able to use H07V-R 35 mm ^ 2 between the SPD and GSU. The PE rail can clamp 25 mm ^ 2 max. For me, this is not some butter, because there are two grounding conductors to the PE rail, one directly and the other via the SPD. In addition, we extend the path from SPD to GSU through the PE rail. If it will be SPD 4 + 0, then the sum of surge currents from L1, L2, L3 will be shorted to PE in SPD, the more such connection between SPD and GSU should be solid and as short as possible.
But for me it's borderline alternative electric mate. Two green and yellow wires. This had already been reworked at the dawn of the use of RCDs. Wlz five-strand plus a cordage in a shaft. Nonsense.
Discussion focused on the design and installation of a switchboard for a single-family house, emphasizing phase separation and protection mechanisms. Users raised concerns about the excessive use of residual current devices (RCDs) in circuits, the appropriateness of distribution blocks between RCDs and circuit breakers, and the correct connection of surge protective devices (SPDs). The necessity of separating the neutral (N) and protective earth (PE) conductors in a TN-C system was debated, along with the proper grounding techniques and the installation of lightning protection systems. Suggestions included using comb rails for connections and ensuring that SPD connections are as short as possible to minimize voltage surges. The importance of adhering to electrical standards and safety regulations was highlighted throughout the discussion. Summary generated by the language model.
talk to the layman :)
