How to chisel walls for electrical wiring: grinder and wall chaser, other tools, surface preparation

With a major overhaul, there is a necessary type of work, which is indispensable - this is wall chasing for wiring. The process will accelerate if you know the characteristics of the tools used, and also have an idea of ​​how effective they are in each individual case. Shtrob with a grinder or a perforator, a chasing cutter or a hammer and chisel, laying channels in the walls from brick and concrete - these are nuances that will affect the result of the performed wiring actions electrical wires. To avoid any difficulties, you should choose the right tool.

Preparation of channels for electrical wiring

Getting started with the strobes, you need to draw up a plan for the location of the cable and its connection points. Transfer the resulting scheme to the plane of the walls, marking with lines the places where the furrows pass. Mark where outlets, switches and junction boxes will be located.

Work on the preparation of channels for laying an electric cable must comply with the regulatory requirements of SNiP 3.05.06−85:

1. Load-bearing walls must not be chiselled.
2. The channel should be laid parallel to the structures: in a vertical or horizontal position. It is forbidden to groove diagonally.
3. The greatest distance between the groove and the ceiling should be up to 15 cm.
4. It is forbidden to make a furrow at a distance of less than 40 centimeters from the gas pipe.
5. The depth should not be more than 25 mm.
6. It is necessary to inspect carefully the places where the new electrical wiring will be laid, for the presence of the old one. For examination, you need to take an indicator screwdriver.

If the ceiling is reinforced concrete, then you need to lay the cable only along the walls. Strobing in this case is strictly prohibited. Concrete is fragile, so even a small depression can predetermine future splits.

Using a wall chaser

Before you start processing the walls, you should find out what material they are made of, and choose a tool for chipping the walls for wiring.

The presence of professional accessories will greatly facilitate the work. It can be:

• wall chaser;
• hammer and chisel;
• puncher;
• Bulgarian.

The wall chaser is the most effective tool. His device is designed specifically for making grooves in the walls. This is a grinder equipped with two disks that are parallel. The execution of the groove of the desired size is carried out by adjusting the gap between them. The retainer sets the same channel depth along the entire length. When using other tools, you get drops.

The disadvantage is that a lot of dust is generated at the time of use. Basically, all wall chasers are equipped with clamps, with which the vacuum cleaner pipe is attached to the device. This is necessary for the convenience of removing unnecessary material. The wiring groove is made much faster, as it is cut in one pass.

Using other tools

Using a hammer and chisel will make the groove uneven. This method does not require financial costs (no need to purchase power tools). In this case, the canal will have to be made in parts: mark the edges of the groove with a chisel with a depression of 1-1.5 cm and chisel along the length line marked in the diagram. After removing the layer, continue deepening the groove until the desired size is obtained.

With a puncher, the same work can be done in a shorter period of time, but the chasing will also not be entirely even. In this case, you need to use a drill and a spatula. Make holes along the furrow with a depth of no more than 25 mm at a distance of 10-15 mm from one another. Remove unnecessary material with a spatula.

When working with a grinder, the walls of the channel are smooth, but a lot of dust is formed in the room. The best option would be to use a diamond disc, since it is convenient to use it when processing a brick or concrete wall.

Along the marked edges of the groove, parallel incisions are made along its entire length. Waste material in the channel is removed with a chisel and hammer or with a perforator equipped with a spatula.

Laying a groove on a brick wall

The bricks are held together with cement mortar, which can be removed without effort. This is done with a chisel and hammer. The strobe should go exactly along the seam of the masonry. In this case, dust formation will be minimal. The vertical furrow is made with a hammer drill using different attachments.

The material from which they are built plays an important role in chipping the surfaces of the walls. The course of work, which has its own characteristics, also depends on it. Execution process:

1. Before the start of chipping with a hammer and core, you need to mark the places for the holes in the form of recesses (then the drill will not go to the side).
2. Hold the tool at right angles to the wall to prevent mechanical stress from breaking the drill.
3. In the process of execution, there is a strong heating and dullness of the instrument, therefore, it should be periodically cooled in cold water.

It is more difficult to work with burnt bricks. It can be identified by the black color of the dust. This interval of distance must be covered at low speeds with the connection of the percussion method of the instrument. The bridges between the holes are removed using the chisels of the hammer drill in the "no drilling" mode.

Making a furrow for concrete

To lay a gutter in a concrete wall, it is better to use a chasing cutter, a puncher and a chisel. At the same time, be careful not to disturb the reinforcement that is inside the slab to strengthen the structure.

When working on a concrete wall, a large amount of dust is emitted. Therefore, you can use the hammer drill, operating it in percussion mode. The rest of the process proceeds in the same way as when working on a brick wall.

In the absence of a wall chaser, you can use a grinder. It is better to equip it with diamond discs, the diameter of which is 105-125 mm. To select the depth of the groove, consider the diameter of the cable to be laid, as well as the thickness of the putty layer. You need to cut the edge of the furrow step by step: first make a depression by 1 cm and pay attention to how the tool handles the load. If the concrete yields well enough, cut to the desired depth to the end.

Wood and aerated concrete work

When laying a groove for electrical wiring in a wooden wall, you can use all tools, except a puncher. The chisel can be replaced with a chisel, which will help get rid of excess wood between the edges of the grooves made by the grinder.

For wood, not a diamond, but a circular disc is used. Instead of dusty formations, a small amount of sawdust is formed.

Aerated concrete blocks are easy to process, so they are quite suitable for arranging grooves with manual wall chasers. They are used in two situations.: for slitting on horizontal and vertical surfaces.

Both types of hand tools have common advantages: low price, low weight, simple design and reliability in operation, as well as minimal dust formation and noiselessness. It is possible to use a grinder with a circular nozzle.

Cable installation and installation of sockets

There are two types of wire arrangement in the strobe. The first involves laying several cables assembled in an insulating corrugation. First, a corrugated pipe is placed in the groove, and then wires are pulled through it to the place where sockets and switches will be installed.

The second method of laying is done without using a pipe. In this case, the cable in the groove is fixed with plaster, plaster or putty.

The most convenient way of placing outlets is in blocks in one frame. They are equipped with not only electrical outlets, but also connectors for the Internet, telephone, cable TV.

The methods described above are not suitable for chamfering holes for sockets, switches or junction boxes. To ensure that all sockets are of the correct shape and with even edges, it is necessary to use a hammer drill with the appropriate diameter. The instrument should be used in percussion mode.

Dust-free slitting

During repairs or when replacing wiring, you will have to lay grooves or make holes in the walls.

This creates a large amount of construction dust that settles throughout the room.

To grind the wall for dust-free wiring, you can use the advice of experts:

1. It is good to moisten the surface on which the wiring channel will be made.
2. Use a household vacuum cleaner to trap dust.
3. It is best to take a wall chaser with a special vacuum cleaner connected to it. Then making holes in the walls will take place in a comfortable environment.

There is also such a method of cutting channels with a dust-free grinder, like wet cutting of concrete. This method is carried out using a hose that continuously supplies water to the cutting disc and the cutting area. Be very careful, otherwise liquid may get on the power tool and render it unusable.

After finishing the chasing, the channels should be treated with a primer and the cable should be fixed in them. Seal the grooves with plaster, mortar or putty.