We chase the walls for wiring dust-free angle grinder
Features of slitting a concrete wall
If you are thinking about the question of how to gouge the walls for wiring, then at the first stage you need to use a pencil and paper. Your task is to schematically mark the line of the wire passing. It is important to determine the exact locations of the outlets and switches. To do this, you need to familiarize yourself with the set of rules that govern the distribution of electrical equipment.
Many people believe that they know the method of chasing, but in practice they face problems. If you are faced with the question of how to properly groove the walls for wiring, then you should know that the horizontal grooving should not be located further than 150 mm from the overlapping slabs. Vertical grooves should be avoided in the case where they can run near gas pipes. It is necessary to deviate from the latter at least 400 mm.
Windows and corners should be removed 150 mm or more. It is only necessary to lay pipes vertically or horizontally. There should be no unnecessary slopes. As an exception, only attic structures are used, here the wiring should be located parallel to the wall. at an angle.
When home craftsmen are wondering how to properly groove walls for wiring, they learn that the length of a solid furrow should not exceed 3 m, while its width and depth are 25 mm. It is also important to exclude the presence of turns. The transition to the outlet and the switch should be done at the same angle. The exception is joints that have a horizontal surface. It is forbidden to make horizontal grooves in load-bearing walls. This recommendation applies to buildings in all regions. When it comes to panel houses, this rule should be followed.
The process of laying electrical wiring and fixing it has a number of nuances. After the completion of the work, the groove is closed. This can be done, as mentioned above, using plaster. Putties and plaster are used as alternative solutions.
Now you know how to chase walls for wiring without dust. for this you should use a chasing cutter. It acts as an ideal modification to the option with an angle grinder. The device provides the ability to install a pair of diamond cutting wheels. You can adjust the distance between them. The main advantage is that the circles are covered with a casing that blocks the point of contact with the wall.
Why you shouldn’t use an angle grinder
If you, too, were among those who wondered about the best way to grind the walls for wiring, then you probably considered the options for using an angle grinder. Additionally, a diamond disc should be purchased for it. With its help, you can grind not only brick and concrete, but also plaster. In the latter case, the work will be easy.
The whole process will be almost identical to the previous one, the only exception is the result, it provides for the formation of a smoother groove. This is important to consider when minimizing damage to wall finishes or plaster. However, experts do not recommend using an angle grinder, since working with it is accompanied by the formation of a large amount of dust, which fills the room completely upon completion. But to solve the problem, you can use a vacuum cleaner, it is better if it is an industrial one. When chipping, in this case, you should enlist the help of another person who will hold the suction pipe near the cut.
Using a hammer and chisel
When wondering how to chisel walls for wiring, you can consider one of the simplest options. using a hammer and chisel. The length of the section to be punched out should be divided into separate segments. With the help of a chisel, the master will have to outline the grooves, the marks should be located along the edges of the future groove. The indentations should be equal to the width of the tool tip. After, having installed it across the direction of the future cable, part of the wall must be knocked out.
You should continue to remove the top layer further. You need to move along the intended mowing line, and at the end you can deepen the groove by 25 mm along its entire length. After each removal of the top layer, you can deepen the strobe immediately. However, these tools cannot be used if the wall is concrete, since the material at the base is strong enough, so it will be difficult to work.
Why you shouldn’t choose a hammer drill
Before starting work, you can ask a question about how deep the wall should be channeled for wiring. Using a hammer drill, it is necessary to deepen by 25 mm. With the help of a spatula, in the next step, you can deal with the device of the groove. The main condition for this is not to set the blade across the mowing line. In this case, you will chip off the excess piece of plaster or wall. As a result, the strobe will not acquire the desired width and depth parameters, in addition, the appearance will not be very attractive. Slitting with a punch allows you to achieve the result, but the process itself is not very clean and fast.
Before starting work, you should definitely ask the question of how to gouge the walls for wiring. Today, a huge number of methods for carrying out these manipulations are known. You can use:
- wall chaser;
- chisel and hammer;
- Angle Grinder;
- impact drill.
A wall chaser is an almost ideal tool as it allows you to get even cuts. However, its cost is high. But if you plan to use a puncher, then the manipulations can be carried out very quickly, and the work will have a low cost. With the help of an angle grinder, these grooves are smooth, but debris will form, which is difficult to get rid of. The main advantage of the chisel and hammer is the low cost. However, if you want to achieve high quality, then you should not save on tools.
How to chisel walls for wiring with improvised and professional equipment?
Overhaul involves replacing not only the flooring and wallpaper, but also the electrician, and you need to know how to cut the walls for wiring if you are going to do this work yourself. In the article, we will talk about the four available tools and a professional apparatus, compare the effectiveness of each of them, and also find out on which surface gating is prohibited.
- 1 Things to Consider Before Getting Started?
- 2 Hammer, drill and chisel. proven old-fashioned ways
- 3 Rotary hammer angle grinder. how effective is the interaction?
- 4 Wall chaser. what is this tool?
- 5 Holes for sockets and finishing. how to do it right?
- 6 What designs are forbidden to chase?
Before making a strobe in the wall, make sure that the old cable does not lie in the path of the new wiring, and if there is one, check if it is de-energized. A special indicator will help determine this. Next, we carefully prepare the walls. We remove the remnants of old wallpaper and other finishing materials that can clog the casing of the working device and lead to a short circuit. The next step is to prepare a sketch with notes on the location of future wiring, a layout plan for switches and sockets.
Before chasing the stripped walls, using a tape measure and a pencil, we outline the path for laying the wiring and additional elements. Use a laser level to save time. If you personally carry out the process of work from start to finish, read the normative document SNiP 3.05.06-85, which describes in detail how to properly cut the walls. The laying of wires is carried out parallel to the foundations of the structure. strictly vertically or horizontally. Tilting the groove at an angle is allowed when laying electronic wires in inclined walls (in attics).
According to the norms, horizontal grooving is carried out at a distance of 150 mm from floor slabs, vertical. at a distance of at least 100 mm from door and window openings, and retreat from gas pipes at least 400 mm. The depth and width of the groove is at least 25 mm, depending on the thickness of the cable. For a cable with a thickness of 1 cm by 3 cores, the depth should be 3-4 cm. The average length of the groove is 3 m. We advise you to design the wiring plan in such a way as to minimize the number of turns of the groove to the switch and sockets. Ideally, you should have one turn from the junction box to the outlet or switch. It is forbidden to make horizontal grooves in supporting structures, this rule applies to all walls of a panel house.
The main points are taken into account, we get to work, and in order to comply with safety measures we put on a respirator, goggles, and open the vents for ventilation. To save time on subsequent redevelopment, before finishing, mark with a marker and tape measure the distance from the corners of the walls and ceiling to the strobes, take a photo of the resulting sketch. So you will know where the wiring is going, and you will not be mistaken with the choice of a place for a dowel or a nail.
It’s time to get your tools ready. Use a professional machine (wall chaser) or look for an alternative. The easiest option is a hammer and chisel. We start work with markup. With a chisel we mark the grooves where the strobe will pass under the electrical wiring. Next, we put the point across the furrow, knock out the top layer of the wall with a hammer, continue to work along the intended mowing line, and then make 25 mm indentations along the entire length. The advantage of this method is the availability of tools. But there are more disadvantages. It takes a lot of effort, time, the contours are uneven. Making such a groove in brick or concrete is problematic, but for plaster it is a good budget option.
Chipping with a hammer and chisel
The drill will speed up the process. Drill holes along the planned mowing line every 1–1.5 cm to the required depth. After this procedure, you will receive the outline of the groove. To complete the job and create a single strip, take a chisel and knock out the jumpers between the drilled holes. This option can be used for slitting concrete. However, as with a hammer, you will not be able to achieve straight lines and uniform depth.
A punch helps to grind the wall for electrical wiring on your own. Professional and amateur tools differ in quality, a set of attachments and additional characteristics, but the main advantage of this technique over a drill is in any version. the impact function. Yes, this function is also in the drill, however, with constant work in the hammer mode, the equipment quickly wears out.
The hammer drill is a powerful tool, if you wish, you can turn off the rotation and get a full-fledged jackhammer. Therefore, it is simple and quick to gouge a concrete wall with it. For work, we use two nozzles with a short and long drill, a metal spatula. The principle of operation is not much different from the option in the previous chapter. We make holes along the planned mowing line at a distance of 1–1.5 cm to a depth of 25 mm. We clean the recess from the remains of concrete with a spatula. The finished strobe turns out to be slightly uneven.
And if you want straight lines, combine an angle grinder (angle grinder) with a rotary hammer. To keep the process fast, the angle grinder is equipped with a diamond disc. So working with a brick or concrete surface will not give you a hassle. We make two parallel cuts at a distance equal to the width of the groove. Next, take a hammer drill and make a groove to the required depth, repeating the familiar steps described above. The combination of these two tools results in smooth mowing lines and a fairly uniform groove depth.
The main disadvantage of this method is the large amount of dust that is emitted when working with an angle grinder. To minimize it, use an industrial vacuum cleaner. For the convenience of work, involve an assistant who will hold the vacuum cleaner as close to the cut as possible. Do not forget to ventilate the room well after chasing.
The wall chaser is a professional tool used for wall chasing for wiring. This is an improved model of angle grinder, which is used by electricians. Two diamond discs are mounted in the device, thanks to which a precise cut line is obtained with the ability to adjust the distance and width of the groove. The cutting discs are covered with a special cover. They block the point of contact with the wall.
The groove cutter has a branch into which the hose from the construction vacuum cleaner is inserted. Due to the suction, dust-free chasing is ensured. After the cuts are made along the entire length of the groove, excess concrete and bricks are removed using a perforator. There is only one drawback of such equipment. high, then for brands of foreign production (Bosch, Makita, Metabo) you will have to pay an average of 30,000-55,000 rubles, depending on what the body is made of.
If it becomes necessary to make holes for an outlet or switch, follow the instructions below. First, make a hole in the center with a diameter of 8 mm, and then make a small cut with a crown to indicate the outline of the future socket (switch). Make 8-10 thin holes along the perimeter of the marked contour, after which you effortlessly make one through hole with a crown. When drilling the hole for the switch box and socket, do not hit the fittings. Violation of the integrity of the reinforcement can lead to cracks in the walls and their destruction.
When installing the socket at a short distance from the floor, the chasing in the wall can be omitted. Lay the wires to the floor.
Strobing for sockets
After the grooves and all the necessary holes have been prepared, we clean the walls with a vacuum cleaner and a broom from dust. After laying the cable, we carry out the sealing of the groove using putty, gypsum, plaster or alabaster powder for this. Please note that the walls must be grooved before plastering in order to achieve the most even surface before gluing the wallpaper.
The main question that arises for an inexperienced builder is “Is it possible to gouge a load-bearing wall?” If we are talking about external load-bearing walls and partitions, it is allowed to slit, since they have a large thickness and strength, which allows them to withstand the loads of perforating equipment without consequences. The same cannot be said about the internal load-bearing walls of the frame-panel type. To carry out such work, you must obtain permission from the municipal construction committee.
It is also forbidden to make a groove in the floor of a panel house. If wiring is necessary, make a concrete screed and provide space for the cable. The ceiling can only be channeled along the shortest path to the luminaire. Are grooves made in reinforced concrete partitions? Not. This leads to the appearance of cracks in the structure and adverse consequences. In extreme cases, if it is necessary to make a strobe, a shallow groove is made so as not to damage the reinforcing frame.
When installing electrical wiring in a bathhouse or a wooden house, do without strobing. The walls of such buildings are made of wood or timber; the material will not have to be grooved, but sawed. This is a complex process that takes a lot of time and effort. Therefore, the installation of open wiring is used. The same rule applies to wood flooring. Wires are stacked behind boards, chipboard panels, skirting boards, insulation.
Plasterboard walls are a thin and fragile material, so it will not be possible to carry out horizontal or vertical grooves in them for laying the cable. As with wood, wires are laid in corrugations or between profiles. But making a hole in the drywall for an outlet or switch is allowed. To do this, use a crown. The last materials that I would like to draw your attention to are aerated concrete and foam concrete. In them, the strobe is made using a manual chasing cutter, which costs about 1000 rubles. In any case, in each region the rules for wall chasing may differ, so we recommend that you familiarize yourself with them first.
With a hammer and chisel
The least expensive and affordable way. Due to the complexity and duration of work, it is used in small areas. To make a groove in the wall, with neat movements with a flat chisel, they pass along the outer lines of the marking, tapping with a hammer. Chipped off pieces of concrete to the desired depth. If necessary, trim uneven areas. During operation, a minimum of dust is generated, no additional costs for the purchase of a power tool are required.
Slitting angle grinder
A common option due to its availability and ease of implementation. A diamond disc is fixed on the tool, the device is connected to the mains. The sander makes furrows quickly and efficiently. To do this, with the included tool, they pass through the previously made markings. After chisel and hammer chisel out the pieces of concrete remaining in the middle of the grooves.
work intermittently to prevent overheating of the angle grinder. To protect the eyes and respiratory organs, wear goggles and a respirator, as a lot of dust is generated. To reduce dust formation, the wet method is used: before turning on the grinder, the wall is moistened. A special vacuum cleaner that connects to the working tool will also help to get rid of dust and debris.
Wall chipping tools
You can make grooves for communications with a hand or power tool, professional equipment. In the arsenal of a home craftsman there is always a hammer and a chisel. These tools are suitable for walls made of soft material: plaster, aerated concrete, block. The advantage of the method is that there is no need to purchase an expensive tool. A small amount of dust is generated during operation. But this method is laborious and unprofitable for large volumes.
Accelerates the process and makes it more efficient. an electric drill. The technology is used in small or medium-sized areas, since during long-term work on concrete walls, the drills quickly “burn”. For walls of any hardness, a drill with a perforator function is used. A nozzle in the form of a spatula is put on it. The grooves are smooth, the process is faster.
Professional equipment. a wall chaser will help to make a minimum of efforts. There are two diamond discs on it, thanks to which smooth cuts are obtained. This method is used for large-scale work, since it is impractical to purchase expensive equipment for home use.
Features of slitting for wiring
Installation of electrical wiring is carried out in accordance with the norms and requirements of SNiP. Wires are laid in the wall according to a pre-drawn plan, which indicates the location of sockets, switches, lighting devices.
The work is carried out independently or with the involvement of a team of builders, observing the general rules:
- Channels for wires are prepared in a strictly horizontal or vertical direction.
- The distance from the floor, ceilings is observed within the limits of 100 mm. 400 mm retreat from gas communications, heating systems.
- The strobe is made up to 25 mm deep and wide, up to 3 meters long.
Failure to comply with the rules leads to penalties and a breach of security in the house.
Application of a wall chaser
Optimal slitting option that provides cleanliness and moderate noise during the process. The tool is efficient and easy to use. Two circles are simultaneously installed on it, which perform even cuts. The master adjusts the width and depth of the grooves independently. The chaser has special holes for connecting a vacuum cleaner to get the job done clean.
It is easy to work with the tool, connect the device to the mains. Bring the chaser to the intended mowing line on the wall so that it is exactly in the middle between the two discs. The groove is cut out, then the remains of concrete are removed with a perforator. The disadvantage is the high price of the device, so it is mainly used by professionals.
Using a hammer drill (hammer drill)
Prepare the tool and the nozzle in the form of a drill or spatula. They work on brick and concrete walls. The locations of the communications are preliminarily designated with fishing lines. Connect the percussion drill to the mains, fix the nozzle and check the performance. Transfer to the drilling mode with a blow. The switched-on unit is brought to the wall, a channel is carefully formed, removing pieces of concrete or brick from the groove. During chipping, the tool is firmly held with both hands, achieving the desired dimensions.
The advantages of the method are speed and convenience. The disadvantages include: the formation of dust, small debris. During work, you can attract an assistant who will vacuum the area in a timely manner. Channels in the wall are obtained with nerve edges.
How to chisel walls for wiring
During the repair, cables and pipes in the walls are laid in pre-prepared niches in the walls. Then the laid communication is hidden with finishing materials. Regardless of where the work is carried out: in a new building or in a secondary housing, compliance with fire safety rules is required. Therefore, we will try to answer in detail the question of how to groove walls for wiring?
Methods for chipping walls for wiring
There are 4 options for preparing the grooves for communications. The difference between them is the chosen tool and the technique of work.
Chipping wooden walls
Fire safety regulations prohibit chasing walls in wooden buildings, this also applies to baths. In the event of a short circuit, there is a risk of ignition of the walls from the electrical wiring laid in them. In this case, special cable channels are used.
Preparing the room and marking the work surface
Before starting work, you must check the location plan of the old wiring. If there is no such plan, then with the help of a tester or indicator, you need to detect it and mark how it passes. It is best to de-energize the old wiring, but if this is not possible, then try to lay a new one without crossing it. This is to prevent injury from electric shock.
The new wiring route is marked on the walls. Marking is carried out from junction boxes to all connection points.
Wall slitting technology
The electrical wiring is laid in concrete in the first stage of the renovation activities. It is not recommended to grind in a populated room, as the work is very dusty. First you need to remove furniture, office equipment, etc. If this is not possible, cover them with foil or other material to protect them from dust. You will also need a construction vacuum cleaner, with which you will need to remove debris and dust.
Distances, depth, width of the groove
The wiring grooves are limited in size. The groove width should not exceed 30 mm, the depth. 26 mm. The length of the groove from the distribution unit to the connection point must not exceed 3 m.
Strobe in the tiled floor
Sometimes it is necessary to lay the wiring on the tiles already glued. Such work is performed only by an angle grinder or a wall chaser with diamond discs installed on them. A hammer drill or drill is not suitable for this purpose, since their use can lead to chips and cracks in the tile.
How to chase walls for wiring. requirements, selection of tools, chasing technology
Sometimes the house needs to replace old electrical wiring or increase the number of outlets, lighting fixtures, and so on. To prevent the wires from passing along the surface of the wall, spoiling the appearance, a chasing procedure is carried out. Work on cutting the groove is carried out during major and cosmetic repairs, when laying electrical wiring in a new building.
Hammer and chisel
This tool is suitable for work on materials with low hardness. plaster, foam concrete, soft stone, sometimes brick, if a chisel with a hard tip.
- No need to spend money on an expensive tool;
- Small amount of dust during work.
The downside is that a lot of time and effort is wasted. This method is best used where a small scale of work.
The location of sockets and junction boxes is marked on the wall according to the wiring diagram.
Steps for chasing under sockets:
- A hole with a diameter of 8 mm is drilled in the center of the connection point;
- The contour of the niche for the outlet is outlined using a special nozzle (crown) for a drill;
- Holes are drilled along the mowing line of the entire intended contour;
- Using a drill with a crown bit, a niche is drilled for the connection point.
Tips on how to gouge walls for dust-free wiring
Any master knows that when replacing wiring in an apartment, you have to make holes in the walls. The resulting construction dust settles throughout the room. Is it possible to facilitate the process of work and subsequent cleaning?
A few tips on how to carry out dust-free chasing will be useful to those who are starting a repair.
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Than the walls are chased
The standard arrangement of lamps or sockets does not always suit the owner of the apartment. In this case, the question arises about their transfer to another place. To do this, it is necessary to make grooves or holes in the walls or ceiling. In multi-storey buildings, they are made of concrete or brick. Therefore, if it is necessary to groove the walls for wiring, it is better to take care in advance in order to avoid a large amount of dust.
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You can make the grooves in the wall manually, but if you need to lay a long cable, this will take a lot of time. Therefore, it is better to use a power tool. For work of this kind use:
- Angle Grinder,
- wall chaser,
- impact drill,
- chisel and hammer.
The use of a hammer drill has a number of disadvantages. First, the instrument makes a lot of noise. Therefore, if work is being carried out in a residential building of a high-rise building, you will have to negotiate with neighbors. The process of chipping with a perforator is quite laborious and time-consuming. In addition, the resulting indentations have an uneven edge. A traditional “angle grinder” with a diamond disc produces holes with a good edge, but the grooves themselves have an uneven surface. This creates the risk of damage to the wiring, in addition, too much dust is generated in the process.
The ideal option would be a wall chaser. With its help, you can quickly and easily make holes and grooves for an electric cable. This tool cuts with two blades. They are insulated with a casing that covers the point of contact with the surface. This makes it possible to punch furrows of different depths. The strobes are smooth on the inside, and their edges remain even.
In the absence of a power tool, you can also make a strobe manually. For this purpose, a chisel and a hammer are used. This technique is not suitable for hard materials such as sand-lime brick or concrete. With the help of a chisel, a groove is punched in the wall, which is then deepened and widened. At the same time, the tool is held in the right hand, parallel to the surface, and hit with a hammer.
How to get rid of dust when chipping
Professional builders use equipment with a built-in vacuum cleaner when laying wiring inside walls. But the cost of such a tool is high and it makes no sense to buy it for a one-time event. In order to grind a wall with a wall chaser without additional options, without creating a cloud of dust, craftsmen have to go to different tricks. The simplest way is abundant wetting of the treated surface with water. Small particles can be collected with a simple household vacuum cleaner.
To grind the angle grinder without dust, use the technology of wet cutting of concrete. It consists in the continuous supply of water to the cutting disc through the attached hose. You can use the help of an assistant who will simply water the disc and the cutting area from a plastic container. In this case, you should be careful not to get any liquid on the power tool.
The following measures will help to reduce the dustiness of the room:
- the floor is covered with foil,
- an industrial curtain or fabric is fixed above the entrance,
- put a wet rug in front of the door.
After the strobes are done, the debris is swept away with a broom and vacuumed. The deepening is treated with soil, the cable is laid and fixed. The channel is sealed with putty, plaster or plaster.
You can run electrical wires without chipping the walls. This option is attractive due to the complete absence of dust. The trade network contains many different products that allow not only to disguise open wiring, but also to revive the design of the room. These include:
- corrugated sleeve,
- cable channels,
If there is a need to replace the wiring, without laying a new one, you can use the existing channels.