A few secrets for installing socket boxes in a concrete wall

The concrete base of vertical fences in buildings is a durable material that cannot be processed with traditional hand tools. With the advent of hammer drills in everyday use, the problem of installing socket boxes on concrete was successfully solved. The electrical industry supplies the market with a wide range of cups for mounting switches and sockets. You need to understand why they are produced in different types and sizes. After reading the article to the end, you can independently select and install the desired design of the socket box (PR).

Types of polymer glasses Source dvoroz.ru

Types and sizes of PR

Planting containers for electrical fittings are produced in a wide range of models and modifications. It is difficult for an inexperienced consumer to understand this variety. The sizes and types of socket boxes are designed for different installation conditions. PR is made of durable and non-flammable plastic - PVC and polypropylene. These materials have high dielectric properties and can be processed with cutting tools. Plasticity allows you to make products of complex geometry and different colors.

Kinds

There are 4 types of plastic boxes based on their shape:

• round;
• oval;
• rectangular;
• block.

Cylindrical housings are mainly used to secure the fittings of switches and point sockets in them. Oval boxes are an elongated ellipse. Several points of connection to the electrical network are placed in them at once. Rectangular PRs are used to place low-voltage fittings in them for connecting contact connectors for television, radio and high-tech equipment.

Block socket boxes Source sdvor.pro

A separate group of socket boxes are made up of block elements. Basically, these are round boxes that have side projections that fit into each other of two boxes. This feature allows you to connect socket boxes together into blocks of any number of elements. This solution eliminates the need for multi-connector extension cords.

Dimensions

Plastic glasses around the perimeter of the opening have a side. It is needed to rest against the wall surface. PRs are characterized by external and internal diameters. The outer size of the socket box (along the side) can be 68 - 71 mm. The internal diameter ranges from 60 – 66 mm. For different manufacturers, the dimensions of concrete socket boxes may vary slightly. However, all of them are designed for standard fittings of sockets and switches. The standard dimensions of the landing box are 60x45 mm, where the first number is the internal diameter, and the second numbers indicate the depth of the glass.

Dimensions of a standard socket Source kopos.ua

Inside the box, at an equal distance from each other, there are 2 or 4 longitudinal thickenings into which small self-tapping screws are screwed. After installing the socket box into the concrete wall, the heads of the screws are threaded through the holes in the terminal pad. The screws are tightened until they stop, fixing the reinforcement inside the glass.

Along with the standard height of 45 mm, the industry produces socket boxes with a depth of 60 to 80 mm. Recessed glasses are used as dispensing boxes. This makes it possible to place a large number of connecting components of the electrical network in one container.

A group of point (single) PRs is mounted on the basis that the distance between their centers will be equal to 71 mm. For block glasses, the length of the connecting elements is 5–6 mm.

The nuances of installing a multibox on a plinth

What should you do if your house has already undergone high-quality repairs, but you need another point to connect electrical household appliances?

In this case, it is not at all necessary to rip off the new wallpaper and ditch the wall; you can make a socket directly on the baseboard.

Multiboxes fit all types of standard single sockets. They can accommodate not only electrical, but also telephone sockets, as well as Internet cable connectors.

However, it should be noted that this method can only be used on collapsible plastic skirting boards with a cable channel. Before installing the socket box, it is necessary to lay the wire inside the baseboard.

To do this, remove the cover from the part where the socket will be located. This operation is performed from a corner or from a nearby plug; simply pry the cover with a screwdriver and carefully remove it.

Cut the baseboard so that there is a gap the width of which matches the size of the plastic trim. Insert the multibox into it, thread the wire through the hole in its body, and secure the socket box with dowels.

How to install a socket box in a concrete wall

Concrete base is one of the strongest bases for wall fencing. Vertical panels are reinforced concrete slabs. If a layer of plaster (2 - 3 cm) allows you to hide the wires in its mass, then to install a seat for the socket box you will need to drill into concrete. And for this you will need a special tool.

Installation of socket boxes in concrete Source prom.st

You should not trust advice on how to fix a socket box in a concrete wall using a drill and a drill bit with a Pobedit tip, or, even worse, do the work with a chisel and hammer. This can be recommended by those people who have never done it themselves. “Stubborn” concrete can only be done with a hammer drill.

Tool

Making an opening in a concrete wall for one seat without the help of a hammer drill can take a whole day of labor-intensive and dusty work. A universal power tool, equipped with a crown or a special drill, can handle small and deep holes quite easily in perforation mode. Any inhabitant of a home can easily master the control of a rotary hammer. If there is no instrument in use, then it is rented.

Hammer Source cmp24.ru

You can make many holes with a drill and knock out the concrete with a chisel, but it is best to do this with a crown with diamond attachments or pobedit teeth. They are equipped with drills that center the entrance of the cutting attachment into the concrete mass. If further passage of the hammer drill is hindered by the reinforcement of a reinforced concrete wall, then it can be cut with an old used crown.

A level will be needed to indicate the horizontal line of a group of sockets. To apply the markings you will need a pencil and a ruler.

Crown for concrete Source static-eu.insales.ru

Step-by-step instructions on how to install a socket box in a concrete wall with your own hands

1. Marking.
2. Drilling.
3. Preparing socket boxes.
4. Installation PR.
5. Connection and installation of fittings.

Marking

Determining the location of switches and sockets is regulated by the Rules for the Installation of Electrical Equipment (PUE). Sockets in residential premises must be placed at a distance of at least 30 cm from the floor. For switches, this size is a minimum of 90 cm. Transfer boxes should not be closer to window and door openings than 10 cm. Connection points to the electrical network are located at a distance of at least 50 cm from gas pipes.

Marking of socket boxes on the wall is done after installing hidden wiring. The seat center points are combined into one line. It is drawn with a pencil or marker under the level. If single socket boxes are installed, the distance between the points will be 71 mm. If the glasses are combined into one block, then you need to add the length of the interblock elements, that is, the distance between the centers will be 71 mm + 6 mm = 77 mm. This is not dogma. It is better to check the dimensions yourself with a ruler.

Marking of switches, sockets and transfer boxes Source chebo.biz

Common mistakes

Common mistakes made when installing socket boxes:

1. Installation of socket boxes before the walls are finished, which makes subsequent leveling of the surfaces difficult. When installing parts that are skewed, you will have to remove the mounted boxes and then seal the parts again. An additional layer of plaster reduces the likelihood of contact between the crown and the reinforcement during drilling.
2. Installation of socket mechanisms in walls without transition elements. This installation method is strictly prohibited, since it does not provide insulation of the wall material from the power cables.
3. Horizontal skew of the socket block and erroneous determination of the distance between the centers of the mounting boxes. Incorrect positioning leads to the formation of gaps between the wall surface and the decorative frame of the socket module.
4. It is prohibited to use foam for fixing socket boxes, since the material does not meet fire safety requirements. There are non-flammable foams of class B1, but the strength of the material is inferior to gypsum or alabaster mixtures.

Video description

This video clearly shows the design of the socket boxes:
The dimensions of the standard crown coincide with the external dimensions of the socket boxes for concrete. Therefore, when drilling, the crown is completely recessed into the wall. At the end of the work, a concrete cylinder with a hole in the middle remains in the hole. It is easily knocked out with a chisel installed in the hammer drill in jackhammer mode.

If there is no crown, proceed as follows:

• The socket box is leaned with its bottom against the central marking point and the body of the box is outlined with a pencil;
• I lean the socket box against the drill and mark the height of the glass with insulating tape;
• inside the marking contour, drill the maximum number of holes in perforation mode, recessing the drill to the insulating mark;
• knock out the opening with a chisel in the same way as in the previous case.

Drilling out a seat for a socket box Source electrikmaster.ru
See also: Catalog of companies that specialize in electrical work and installation of utility networks.

Caliper location

The next question is how to correctly position the socket support inside the socket box - with the terminals down or up.

Some are guided by the inscriptions on the case. They should be legible and not upside down.

On the one hand, this is quite logical. But in reality, there is not much difference. This is not reflected in any way in the regulatory documents.

Therefore, mount it in the way that is convenient for you. For example, focus on the incoming cable.

Video description

This video shows the installation of socket boxes:

Preparing socket boxes

Before installation, the side window is broken out in the box. Wires are pulled through the resulting opening to a length of about 10 cm. The ends of the wires are stripped and crimped with a terminal block. Contact elements are necessary for stranded conductors. Shaggy twists often lead to a short circuit and, even worse, can cause a fire in the wiring.

Perforated openings in the glass are located on four sides on the side of the PR. This is done so that you can pull the wire into the box from any direction without creating unnecessary twisting of the wiring.

PR installation

1. The hole in the concrete is cleaned of dust and moistened with water to increase the adhesion of the concrete surface of the nest.
2. Gypsum or alabaster is diluted with water in a ratio of 1:2.
3. The solution is applied with a spatula in a circle inside the hole.
4. The box with the stretched wire is inserted into the seat.
5. The squeezed out solution is removed.

Removing excess solution Source www.sibelektrika.ru

Connection and installation of fittings

After the alabaster hardens, the following actions are performed:

• the stripped ends of the wires or terminals are secured to the switch block or socket;
• Usually the terminals are secured with screws and washers.
• There are fittings with self-clamping fasteners. The ends of the wires are inserted into the holes, and spring-loaded bars clamp them;
• the wire is laid on the bottom of the socket box and the fittings are inserted;
• The pad pad with the holes is put on the PR screws and turned until it is level. The screws are tightened with a screwdriver;
• the side screws of the block are tightened until the sliding legs reach maximum contact with the surface of the glass;
• The switch keys are inserted into the sockets of the block. Then the front frame is attached. The front panel of the socket is screwed to the block with a screw.

Fastening the socket fittings in the socket box Source sense-life.com

Features of installing PR in other wall bases

It should be noted that installing socket boxes in brickwork is no different from installing a PR in a concrete wall. Brick can be easily cut with a pobedit or diamond crown. But the installation of polymer glasses in plasterboard, ceramic tiles, and hollow panels has its own characteristics.

Drywall

The facing material is quite thin gypsum panels. To install sockets and switches, specially designed plastic cups are used. The socket boxes for drywall have external side screw clamps. The outer edge of the socket rests against the surface of the drywall. By tightening the screws, they lift the tabs along the threads, which with their teeth rest against the lining from the inside.

Drywall socket box Source electroua.com.ua

Holes in gypsum panels can be cut with a utility cutter or knife. To get a perfectly even round opening, use a drill with a special bit. It is also used to cut holes in plastic false panels of wall fences. The dimensions of socket boxes for drywall are the same as for glasses for concrete.

Drywall crown Source www.stocklots24.com.tr

Ceramic tile

A diamond bit is used to cut holes in ceramic tile walls. Before starting work, make a template with holes from plywood. It is glued to the tile with double-sided tape. During drilling, the crown is watered. Otherwise, the tile may overheat and it will crack. It is also not recommended to use an attachment with a central drill. It can cause the ceramic to crack.

The resulting openings in the ceramic tiles and the base of the wall are filled around the perimeter with alabaster or gypsum mortar. The socket boxes are inserted into the seats, having previously pulled the wires through the holes in the boxes.

Drilling holes in ceramic tiles with a diamond core Source www.1shop.lv

Hollow panels

For a group of block socket boxes, a rectangular opening is cut with a grinder, a block is inserted into it and coated on all sides with alabaster mortar. You can use a trick. If the bottom of the PR reaches the opposite surface of the void, then a hole is drilled in it and a dowel is inserted. The socket box is secured by screwing a self-tapping screw into the dowel through a hole in the bottom. If the depth of the hole is large, then you can place a wooden spacer.

What to do if the socket box falls out of the wall

The reason for this may be improper fastening of the PR in the socket. If this happens and the socket box is undamaged, proceed as follows:

• remove the front panel of the socket, switch keys and frame;
• unscrew the screws of the spacer legs and the pad pad;
• the fittings are removed from the socket box;
• the seat is cleaned of dust and alabaster residues;
• the nest is coated with a primer using a brush;
• the hole is filled with alabaster or gypsum mortar;
• The installation of the box is repeated.

Stripping length

When stripping the outer sheath of the cable, there is no need to try to remove it to the maximum depth, i.e. all the way to the wall of the socket.

Always try to leave a few millimeters. This way, the core insulation will be protected from chafing or crushing by the sharp edges of the socket box.

It is very convenient to do this on a round NYM cable using a special Jokari puller.

Make a circular cut, and then immediately a longitudinal one. After which, even in cramped conditions, the shell is easily pulled out.

With flat cables of the VVG brand and an electrician's knife with a heel, such a trick will not be possible.

And if it is a GOST cable, and not a TU cable, then even more so.

As a rule, a knife with a heel cuts the outer insulation right up to the wall of the socket box.

That is why many electricians like the NYM cable brand and not the VVG cable brand. Because of the convenience of cutting and ease of working with it.

Although each brand has both its advantages and disadvantages.

By the way, in rare cases you can also find a VVG cable with a round cross-section.

How much insulation should be removed from the core itself before inserting it into the contact? Much, of course, depends on the brand of the outlet.

Some models even have a template that is very easy to navigate.

But usually, the exposed part of the core should not exceed 8-10mm.

The length of the wires protruding from the socket box is selected based on:

• ease of installation

• socket depth

You must understand that the length that you leave will be useful in the future for convenient dismantling, pulling out and carrying out some kind of revision work. Or even replacing the socket with a different model.

As a rule, leave a length equal to the width of 3-4 fingers.