Sign “Don’t get in, it’ll kill you” - warning sign SES09, designation, GOST requirements for content, shape and size, placement (installation location and height), design and materials

During work with electrical installations and switching equipment, various operations are performed that pose a danger to the health and life of operating personnel. To avoid unauthorized switching on or off of electrical equipment, special electrical safety signs are used, which reflect the possibility or impossibility of certain actions by workers. They are divided into various categories and primarily warn of possible danger when contacting live equipment in electrical installations.

General information about electrical safety signs

Electrical safety posters and signs are produced according to established standards. They are intended for use in various conditions and are divided into several categories:

Prohibiting . These posters prohibit any actions with switching equipment, the activation of which by mistake may cause voltage to enter the workplace. They also prohibit moving without protective equipment in electrical installations with a voltage of 330 kV or more and an electric field strength of over 5 kV/m.
Warning . Electrical safety signs in this category warn of possible danger when approaching live parts in electrical installations that are energized.
Prescriptive . Allow the performance of any actions subject to specific electrical safety requirements.
Pointing . They indicate the location of certain objects and devices.

In accordance with the nature and characteristics of the application, all graphic images in the field of electrical safety are of permanent or portable type.

For the manufacture of signs and posters, dielectric materials such as getinax, polystyrene, fiberglass, textolite, PVC and others are used. In electrical installations with exposed live parts, it is prohibited to use temporary and portable signs made of conductive materials. They can only be used in electrical installations not directly connected to live parts.

Posters and safety signs are attached to metal or concrete surfaces with great difficulty for technical reasons. Therefore, it is recommended to apply them through a stencil with appropriate paints or stick posters on the basis of self-adhesive film. The paint and varnish materials used must provide a color coating that is resistant to the production and climatic conditions for which they are intended.

In conditions of poor visibility or at night, all signs or posters used must be illuminated in various ways without changing the color or other parameters.

In order to better understand the purpose of each category of posters and signs, they need to be considered in more detail. Their correct and timely use will help protect personnel from accidents and preserve people’s lives and health.

Prohibition posters

The “LOGINE OPERATION DO NOT RE-ON” sign is used to prohibit manual re-closure of overhead line switches after they have been automatically switched off. Such actions must be coordinated with the work manager.

These electrical safety posters must be posted on the control keys included in the overhead line switches. They are hung when performing repair work under voltage. The standard size of the poster is 100x500 mm, with a red border 5 mm wide running along the perimeter. The inscription's letters are red and printed on a white background.

Poster “DO NOT TURN ON! People are working” is figurative. It prohibits applying voltage to the line in all cases. It is hung on buttons, keys and switchgear control drives. When you turn it on, the voltage will definitely get to the line, so this should not be done under any circumstances. These posters are used in electrical installations with voltages not only up to 1000 volts, but also above this value.

The poster dimensions are standard – 100x200 mm, with a perimeter border 5 mm wide. The inscription uses red letters on a white background.

Portable poster “DO NOT TURN ON! operation on the line" prohibits the supply of voltage to the line. It is also hung on the control elements of the switching equipment of electrical panels, when turned on, voltage can be supplied to the line. The inscription is written in white letters on a red background without a border. Overall dimensions are standard – 100x200 mm.

Prohibitory signs “DO NOT OPEN by people working” are also portable. They are hung on valves and gate valves that shut off the air supply to pneumatic switching equipment. An error when opening these devices may cause the equipment on which the work is being performed to turn on. This symbol also applies to gas cylinders, as well as hydrogen or oxygen pipelines, which, if opened, could cause injury to workers with serious negative consequences. The dimensions of the sign are standard; there is a red border around the perimeter.

Warning signs and posters

All maintenance personnel run the risk of approaching dangerous distances from live parts without even knowing it. Warning signs and posters installed near potentially dangerous objects will help to eliminate such situations.

In such cases, the “STOP!” sign is used. voltage”, signaling the danger of contact with electric current. This poster is portable and is used in equipment with a voltage of 1000 volts and other values higher or lower. The standard size is 150x300 mm, the configuration of the red boom is defined in GOST 12.4.026. There is a red border 15 mm wide along the perimeter. The letters of the inscription are black, on a white background.

The “KEEP OUT!” sign performs exactly the same function. will kill."

The "Dangerous TEST" poster clearly states the danger of electric shock during the period when high voltage testing is being carried out. It is installed on the fence of the workplace. Overall dimensions 150x300 mm, a red border 21 mm wide is applied along the perimeter. On a white background there is a red lightning bolt and black letters.

The same warning functions are performed by the sign “DANGEROUS ELECTRIC FIELD, passage is prohibited without protective equipment.” It warns of the potentially dangerous effects that a worker’s body may be exposed to under the influence of an electric field. In such cases, personnel are prohibited from moving around the facility without protective equipment.

It is located in electrical installations with a voltage of more than 330 kV at a height of 1.5-2 m. The specific installation location is the fencing of areas with an electric field strength of more than 15 kV/m. Dimensions according to GOST – 100x200 mm, border width – 10 mm. The general background of the sign is white, the letters and border are red.

CAUTION electrical voltage signs most commonly used to alert personnel. They directly indicate the danger of electric shock and are displayed in electrical installations of all classes and subclasses involved in power plants and substations. The sign is an equilateral triangle with a side of 300 mm.

These dimensions are provided when installing it on the doors of a particular room. If the sign will be placed on machines, mechanisms, or used with other electrical equipment, its sides can be 25, 40, 50, 80, 100 and 150 mm. The color of the arrow and border is black on a yellow background. To apply it to concrete surfaces, black paint and a stencil are used.

Danger! Keep out

Plate code:

SES09

Plate type:

warning sign

Installation locations:

the sign is posted in switchgears on structures adjacent to the one that is intended for lifting personnel to a workplace located at a height.

Plaque placement:

on the stairs (Fig. 1) and on the electricity meter (Fig. 2).

Rice. 1. Sign on the stairs

Rice. 2. Label on the electricity meter

Design:

flat;

volumetric.

Sign material:

self-adhesive film, PVC plastic, galvanized metal, composite. The image on the signs is applied using solvent printing technology with paints that are resistant to environmental influences.

Surface types:

photoluminescent (Fig. 3);

reflective.

Rice. 3. Photoluminescent sign

Durability requirements:

1) mechanically strong, without deformation (deflection) when placing and removing a load of 0.2 kgf/2 min;

2) the surface is smooth, uniform, without inclusions;

3) resistant to alkalis, fuels and lubricants, detergents, water, solar radiation, acids according to the parameters of GOST 9.403;

4) heat- and cold-resistant; climatic version for outdoor placement no less than cat. 1, UHL (from minus 40 to plus 60 °C), and under these conditions bubbles, peeling, and cracks should not form.

Dimensions of the plate according to GOST

SES09 plate shape parameters:

1) GOST 12.4.026-2015

geometric shape - square, rectangle;

clause 6.3.3.7 indicates that the smaller side of the rectangle is related to the larger one as 2:1. Edge width - 0.025 of the smaller side, cm; border width - 0.025 of the larger side, cm;

clause 6.3.4.1 contains the formula for height (equal to the vertical side):

where L is the identification distance;

Z - distance factor (40, 65, 25 at illumination, respectively, 150–300, 300–500, 30–150 lux);

2) the average size under normal lighting, standard Z = 40 and L = 25 is in the table. 3 GOST 12.4.026-2015

;

3) permissible deviations and corner roundings GOST 12.4.026-2015

clause 6.3.4.7 recommends a permissible deviation of ±2%;

clause 6.3.4.8, rounding of corners is allowed (for squares the radius is 0.04 sides, for rectangles - 0.02 smaller sides);

4) signs with a reflective coating and photoluminescence must be no less than 125% of the average dimensions. Designs with illumination over 500 lux are more visible, so for them the identification distance is doubled, and the size can be halved.

Example

What is indicated on the plate

The SES09 plate bears the words “DO NOT ENTER, it will kill you” and the graphic symbol “voltage arrow”.

Mandatory signs

They indicate places of work in electrical installations and indicate safe approaches to these workplaces. Among them, it is often necessary to use a figurative “WORK HERE” sign. In accordance with GOST, they are produced square, with dimensions of 100x100 and 250x250 mm. There is a blue edging 20 or 50 mm wide along the perimeter. The inscription is made in black letters on a white background.

“GET IN HERE” posters, used in cases where the workplace is located at a height, have exactly the same characteristics. At the same time, they are an indicator of the safest route to the desired area. The dimensions correspond to GOST and the previous poster.

Posters as means of protection

Brightly colored images with explanatory inscriptions or symbols are called posters or safety signs. They have a certain geometric shape: rectangular, triangular, square.

Posters are needed to warn both workers and bystanders about the potential hazards posed by electrical installation equipment. Some posters directly prohibit performing certain actions, others carry an informational load, others allow and order work.

The document applies to any means of protection used by organizations of various forms of ownership - both state enterprises and private property, especially if the voltage in electrical installations is above 1000 V.

Workers involved in work in electrical installations must be provided with protective equipment, including posters, and explained how and where they should be used in order to ensure the safest possible working conditions. Portable signs must be part of the inventory that field teams are armed with.

Directional posters

A typical representative of this group is the “GROUNDED” sign. It indicates the grounding of a certain section of the electrical installation and the prohibition of the supply of electric current to it.

Its location is usually the drive of the switching equipment. If prohibition and directional posters are used at the same time, the latter should be hung from above. Dimensions according to GOST 100x200 or 50x100 mm, with a corresponding white border width of 13 and 5 mm. The inscription uses white letters located on a blue background.

In an article previously published on our website on electrical protective equipment, it was mentioned that this category also includes signs and posters on electrical safety (hereinafter referred to as ES). Today we will talk about them in more detail. From the materials of the article you will learn about the different types of posters and signs, their purpose, as well as the nature of their application.

Types of posters by purpose

These funds are classified depending on their functional purpose into the following types:

Prohibiting action , this group imposes a ban on the use of switching equipment to prevent its activation during repair and maintenance work in the area of responsibility.
Preventive action is prescribed to be installed in places where there is a danger of accidental contact with live parts of an electrical installation, or a danger of approaching them. In addition, this category includes a means that informs about the prohibition of entering the electric field zone without appropriate protective equipment.
Prescriptive in nature . The purpose of these means is to point maintenance or repair personnel to a specially prepared place that meets safety standards.
Indicating destination . Currently, GOST provides only one means for this group, informing about the imposition of portable grounding.

Let's look at what products are included in this or that group, the conditions for their use, the accepted format, as well as the acceptable colors. The sequence will be the same as adopted in GOST 12.4.026 2015 (Appendix 9).

Prohibiting

This category includes four types:

Prohibiting the switching on of switching devices that provide power to electrical installations.

Poster “Do not turn on!
People are working” The design is made in two formats: 100.0 x 50.0 mm and 200.0 x 100.0 mm. The inscription is made in red letters on a white background. The inscription is framed with a frame of the same color as the letters. The edging has a width of 1.25 mm and is made in white.

Electrical safety rules allow the use of these safety equipment regardless of the voltage class of electrical devices. Installation is prescribed in places where switching devices are controlled, providing power supply shutdown. If the circuit diagram of the electrical device does not imply the presence of such switches, the poster is installed on the removed fuses.

Prohibition on turning on power lines.

Poster “Do not turn on! Work on the line!

The dimensions remain standard (200.0x100.0 and 50.0x100.0). As for the inscription, it is executed inversely to the previous version, that is, in white letters. Accordingly, the colors of the edging and frame change, but their sizes remain the same.

The purpose is the same as the previous poster, adjusted for cable and overhead lines.

Prohibition on supplying working fluid to the pipeline, opening cylinders, etc.

Poster “Do not open! People are working."

The form factor and color design correspond to the above electrical safety device from paragraph 1. This electrical protective device is installed on shut-off valves in the following cases:

When it is necessary to prohibit the use of shut-off valves for pneumatic drives of switching devices. An example of such devices is high-voltage switches.
If it is necessary to prevent the supply of working fluid into pipelines in order to prevent an emergency and ensure the safety of the repair team.

Prohibition on reactivating the power line switching mode after it has been turned off. This issue must be previously agreed upon with the person responsible for safety.

Poster “Working under voltage. Do not turn it on again"

The dimensions of this type are 100.0 x 50.0 mm. Red letters are used. Installation is carried out on control keys responsible for supplying power to the power lines being repaired. This does not require de-energizing the latter.

Warning

Let's consider the safety equipment of this category, the numbering continues in accordance with Appendix 9 of the above GOST:

Warning sign indicating possible danger of electric shock.

"Caution Electrical Voltage" sign

The sign has the shape of an equilateral triangle with a black border and a yellow background. Inside the triangle is a stylized lightning bolt. Dimensions may vary within the following limits:

For a sign installed on doors, the sides of the triangle have a length of 300.0 mm.

For various electrical installations, the following side lengths are acceptable: 25.0; 40.0; 50.0; 80.0; 100.0; 150.0 mm.

If the installation is carried out on electrical poles of high-voltage power lines, then the distance from the ground to the sign should be about 2.5-3.0 meters. It is allowed to mark supports one at a time if the span does not exceed 100.0 m. Otherwise, installation is carried out on each support.

The sign is similar to the previous one, the main difference is in the method of application. For this purpose, indelible paint (usually black) is used, which is applied to reinforced concrete supports, fences or slabs.

Groups of electrical safety posters

There are 13 posters and signs in total. According to the instructions, according to their intended purpose, they are divided into 4 types:

prohibiting – to prohibit switching devices from turning on/off in order to eliminate the risk of supplying voltage to the work area;
warning - to warn workers that live parts are nearby and protective equipment is required;
prescriptive - for permission to work, but taking into account compliance with safety requirements;
indicative - to indicate places where devices or objects are located (in particular, those related to grounding).

The second group is the largest. It includes 4 posters and 2 signs. There are no signs in other categories.

Based on the nature of their use, posters are divided into 2 groups:

permanent (this also includes signs);
portable.

All types of posters are made exclusively from electrical insulating materials, but permanent signs can be applied with spray paint or a brush to metal and concrete surfaces - walls, parts of structures. Metal parts with marked marks must be kept away from live circuits and devices.

And now in more detail about the types of electrical safety posters.

Group #1 – prohibiting

The category includes four signs, united by the same purpose, rectangular shape and the use of a red and white color scheme.

DO NOT TURN ON people working

A rectangular portable poster, which is used at construction sites and at electrical installation sites (up to 1000 V and above) in order to protect the workplace from voltage supply.

wires of switches and disconnectors;
switches and automatic machines up to 1000 V;
remote control control buttons.

If a circuit with voltages up to 1000 V does not include switching devices, remove the fuses before starting work, and hang a poster near their installation site.

DO NOT ENABLE line work

A portable poster similar in design informs that people are working on the line, so supplying voltage is prohibited.

The purpose is the same as the first poster in the group - prohibition of actions with switching devices: buttons and switch levers, drives that supply voltage to the power cable with which installers work.

DO NOT OPEN people are working

A poster announcing the prohibition of actions that result in the supply of gas or compressed air.

The poster is used at power plants and substations, in areas where electrical installations are located, so that gas or compressed air is not accidentally supplied to people performing electrical installation or repair work.

air duct valves;
pipeline valves.

If you operate a switch or disconnector, move a valve or turn a valve, compressed air or gas (carbon dioxide, hydrogen, etc.) can cause harm to the health of electricians.

OPERATION UNDER VOLTAGE Do not switch on again

A portable poster prohibiting reactivation. Relevant for high-voltage line switches operating in automatic mode. If the line is automatically disconnected by a differential device or RCD, it can be switched on only after agreement with the maintenance personnel.

The poster is hung on the control levers of the high-voltage line during repair work that involves supplying voltage.

Group #2 – warning

The group includes four posters in a red and white color scheme and two triangular signs with the image of a lightning bolt (arrow).

CAUTION ELECTRICAL VOLTAGE

A bright yellow sign warns that an electrical hazard exists and is posted or painted where live lines and devices are installed.

This is a permanent sign that can most often be found at substations and power plants.

entrance doors of control chambers, transformers and switch chambers;
doors of electrical panels with voltage up to 1000 V;
fencing structures of industrial premises, workshops of enterprises, repair areas.

For populated areas - villages, towns, cities, ports, agricultural enterprises, railway stations, beaches, etc., the same version of the sign is used.

The sign is mounted on metal or wooden supports of high-voltage lines at a height of 2.5-3 m from the ground surface. If the distance between the supports is more than 100 m, as well as when crossing the road, the sign must hang on each support. If the spans are less than 100 m, then it is hung not on each support, but through one.

By nature of application

This classification for electrical safety posters and signs allows you to determine whether the device will be installed on a permanent basis or whether it is portable. The first, for the most part, include signs, for example, voltage indicators, which are a triangular information plate with a stylized image of lightning.

Stationary

Of the types listed above, these include the signs given in paragraphs 5 and 6, as well as the warning poster from paragraph 10

Portable

All other posters that were discussed are portable, that is, those that are installed in new places.

It makes sense to create sets of portable posters only when standard maintenance or repair of electrical network components or equipment powered by it is performed. In such cases, you can take a certain number of mandatory, prohibitive or other safety posters and signs, including “danger to life” signs, in advance.

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