Posters and signs on electrical safety and their classification

We offer you an example of signs and posters on Electrical Safety

The use of safety signs and posters in electrical installations is associated with the need to ensure that operations with switching devices are prohibited (turning them on or off) so that during the operation of electrical equipment no one accidentally applies voltage to it.

Posters and signs warn of the dangers associated with approaching energized equipment. Safety posters may also identify the workplace.

According to their purpose, safety posters and signs are divided into:

- prohibiting;
— warning;
- prescriptive;
- pointing.

Depending on the nature of their application, electrical safety posters and signs are portable and stationary (permanent).

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.

The sizes of signs, like posters, are regulated by GOST. Depending on the installation location (on the door, on the wall or on an electrical appliance), the dimensions may vary

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.

The background is white, the letters are red. Along the perimeter of the rectangle, at a distance of 1.25 mm from the edge, there is a red stripe 5 mm wide for a 100x50 mm poster and 10 mm wide for a 200x100 mm poster.

Installation locations:

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 background is red, the letters are white. Along the perimeter of the rectangle there is a white border 1.25 mm wide from the edge, the size of the posters is 100x50 mm or 200x100 mm

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 background is white, the letters are red. Along the perimeter of the rectangle, at a distance of 1.25 mm from the edge, a red stripe 5 mm wide is drawn. Poster size 200x100 mm

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.

Installation locations:

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 background is white, the letters are red. Along the perimeter of the rectangle, at a distance of 1.25 mm from the edge, a red stripe 5 mm wide is drawn. Poster size 100x50 mm

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.

The background is yellow, the arrow and the border around the perimeter are black. The side size of the sign for doors is 30 cm, for equipment – from 2.5 to 15 cm. Design is regulated by GOST R

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

Installation locations:

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.

CAUTION ELECTRICAL VOLTAGE

Like the previous sign, it warns of the risk of electric shock. The design is the same, but the background color is different.

The background is white, the arrow and the border around the perimeter are black. The side size of the sign is from 2.5 to 30 cm. Design is regulated by GOST R

A permanent sign designed specifically for placement on reinforced concrete supports and concrete fences of outdoor switchgear.

STOP voltage

A portable rectangular poster warning of the dangers of electric shock.

The background is white, the letters are black, the arrow and stripe are red. A strip 15 mm wide is drawn along the perimeter of the rectangle at a distance of 1.25 mm from the edge. The image of the arrow is regulated by GOST R. Poster size – 300x150 mm

The poster is intended for use in substations and power plants.

Installation locations:

temporary fencing for live devices and lines;
barriers placed in aisles;
permanent fencing of cells adjacent to the working area.

In switchgears located on the street, the poster is hung on cords that serve as fencing, as well as on structures made of wood, concrete or metal located close to live lines.

TEST is life threatening

A portable poster used during test work - when high voltage is applied and there is a threat to health.

The poster is hung before carrying out work on testing high voltage lines. It is mounted on equipment or enclosing structures with the inscription facing outward.

Danger! Keep out

A portable poster that warns of the risk of electric shock when climbing on structures or devices.

Usually the poster is hung not on a structure with a staircase leading to a workplace located at a height, but on an adjacent one.

DANGEROUS ELECTRIC FIELD without protective equipment, passage is prohibited

The poster is permanent and prohibits staying near the electric field without protective equipment. If this requirement is not followed, there is a risk of electric shock.

The background is white, the letters are red. Along the perimeter of the rectangle, at a distance of 1.25 mm from the edge, a 10 mm red stripe is drawn. Poster size 200x100 mm

The poster is intended for outdoor electrical devices with voltages above 330 kV.

Installation locations:

routes along which distribution devices are bypassed;
workplaces located near an electric field.

A prohibitory poster is hung at a height of 1.5-2 m either on a fence or on a specially installed pole.

Group #3 – prescriptive

Signs in this group do not prohibit or warn, but serve to indicate places of work. They are distinguished by their square shape and blue and white color scheme.

WORK here

The prescription is obvious - a specific place for the repair team or maintenance personnel to work is indicated.

The background is white, the letters are black. A blue stripe is drawn along the perimeter of the square, at a distance of 1.25 mm from the edge. Size – 100x100 mm, 250x250 mm

A portable poster is hung at substations and power plants to indicate workplaces. If the switchgear is located on the street, the best installation location is in the area of passage behind the fence.

CLIMB HERE

The regulation defines where you need to climb to a high-lying workplace to avoid danger.

The background is white, the letters are black. A blue stripe is drawn along the perimeter of the square, at a distance of 1.25 mm from the edge. Poster size 100x100 mm, 250x250 mm

Installation sites are stationary ladders or other structures specially designated for safe ascent to the workplace.

Group #4 – index

In this group there is only one portable poster indicating the prohibition of supplying electric current to a separate grounded section of the device or electrical installation.

GROUNDED

The poster is relevant for power plants or substations; it is mounted on switches, drives and remote keys that regulate the supply of electricity to grounded areas.

The background is blue, the letters are white. Along the perimeter of the rectangle there is a white border 1.25 mm wide. Poster size 100x50 mm and 200x100 mm

In addition to standard posters, it is allowed to hang larger ones if the equipment in electrical installations is large in size. Dimensions are regulated by the same GOST R.

Safety sign materials

All signs and plates that are presented on our website are made (at least) in 3 ways on different materials with a choice of sizes:

Signs on self-adhesive film are very convenient to use, because They can be easily glued to any smooth surface by first removing the siliconized backing. The advantages of this material are obvious - a wide range of operating temperatures (from −40°C to +80°C), service life on outdoor objects - at least 3 years, reliable polyacrylate adhesive that ensures constant adhesion

SELF-ADHESIVE FILMLearn more

Signs on plastic are distinguished by their reliability and relatively inexpensive cost. Such a sign can be attached to any (preferably flat) surface: to a wall or fence - with screws or nails, to a grille - using clamps or wire, to a smooth surface (for example, on a door) - with double-sided tape. According to the standard, we use PVC plastic 2 mm thick (European or Russian production), however, you can order a sign on plastic of any thickness from 0.5 mm to 100 mm

PLASTIC PVC Find out more

Such signs are made on the basis of galvanized metal or metal with a polymer coating (depending on the manufacturing method) with a thickness of 0.7-0.8 mm. Galvanized sheet is a sheet that has undergone a special anti-corrosion galvanizing treatment. As a result of this treatment, the sheet acquires the properties of stainless steel. Despite the fact that the thickness of the ferro-zinc layer on the surface of the sheet is only a few micrometers, the sheet is able to resist the harmful effects of the environment for an almost unlimited period of time

METALknow more

Reflective signs are used both in dark rooms and outdoors at night. The surface of a reflective sign works like a mirror - the light of headlights or a flashlight is reflected from the surface of such a sign, greatly improving its readability. The basis of such a sign can be self-adhesive PVC film, PVC plastic 2 or 4 mm, as well as metal

REFLECTIVE MATERIALS Find out more

Photoluminescent signs are expensive and are only needed to indicate escape routes in case of fire or other emergency situations in which the sign must be visible in complete darkness. For more detailed information about the options for manufacturing photoluminescent signs (materials and sizes) of signs, read our special article “Review of Photoluminescent Signs”

PHOTOLUMINESCENT MATERIALS Find out more

Warning posters

Warning posters warn against approaching dangerous distances from live parts.

“STOP! voltage" - warns of the danger of approaching live parts of electrical installations that are energized. The poster is used in electrical installations with voltages up to 1000 V and higher (applies to portable ones).

Poster dimensions – 300X150 mm. The red arrow is made according to GOST. The width of the red border is 15 mm. The inscription is made in black letters on a white background.

“DO NOT COME IN! will kill" - this poster warns about the possible approach to live parts that are energized when climbing a structure.

The dimensions of the sign are 300x150 mm. The arrow is red. The width of the red border is 15 mm. The inscription is made in black letters on a white background.

“THE TEST IS DANGEROUS TO LIFE” - the poster warns of the danger of electric shock when conducting high-voltage tests. Such signs are posted on the fences of workplaces during high-voltage tests.

The dimensions of the sign are 300x150 mm. The arrow is red. The width of the red border is 21 mm. The inscription is made in black letters on a white background.

“DANGEROUS ELECTRIC FIELD, passage is prohibited without protective equipment” - a poster warning of the possibility of dangerous effects of an electric field on service personnel, and also prohibits the movement of people without the use of protective equipment. Installed in outdoor switchgear in which the voltage exceeds 330 kV at a height of 150 - 200 cm on the fences of areas where the electric field strength exceeds 15 kV/m.

Poster dimensions – 200X100 mm. The width of the red border is 10 mm. The inscription is made in red letters on a white background.

“CAUTION Electrical Voltage” is an electrical safety sign that warns of the danger of electric shock. It is hung in electrical installations of any class and subclass of substations and power plants.

The sign is made in the form of an equilateral triangle with a side of 300 mm - for placement on the doors of premises. If for placement on equipment, machines, mechanisms and containers it can be with sides: 25, 40, 50, 80, 100, 150 mm. The arrow and border are black, the background is yellow.

Also, the sign “caution of electrical voltage” can be applied with black paint on concrete surfaces (slabs, fences, outdoor switchgear fences, reinforced concrete supports, etc.) using a stencil.

What are safety helmets used for?

Helmets are designed to protect the worker’s head from mechanical damage, from water and aggressive liquids, as well as from electric shock when accidentally touching live parts energized up to 1000 V.

Which of the following posters are prohibitive?

Do not turn on! People are working.

Which of the following posters are warning signs?

Carefully! Electrical voltage

Which of the following posters are classified as signposts?

Grounded.

What type of safety poster is a poster with the inscription “Caution! Electrical voltage?

To the warnings

What type of safety poster is a poster that says “Grounded”?

To the index fingers

In which electrical installations are voltage indicators used to check phase coincidence?

In electrical installations with voltage from 6 to 110 kV

What are the requirements for the appearance of dielectric carpets?

They must have a corrugated front surface, one color

What background should the warning sign “Caution! Electrical voltage”, which is mounted on the outer door of the transformers?

Yellow

What background should the warning sign “Caution! Electric voltage”, which is applied using a stencil to a reinforced concrete overhead line support?

The background is the color of the concrete surface

Rules for the use and testing of protective equipment used in electrical installations

What specific effect does electric current have on the human body?

is expressed as follows: electric current, passing through a living organism, produces a thermal (thermal) effect, which is expressed in burns of individual parts of the body, heating of blood vessels, blood, nerve fibers, etc.; electrolytic (biochemical) effect - expressed in the decomposition of blood and other organic liquids, causing significant disturbances in their physical and chemical compositions; biological (mechanical) effect - expressed in irritation and stimulation of living tissues of the body, accompanied by involuntary convulsive contraction of muscles (including the heart, lungs).

Which electric current is more dangerous for humans: direct or alternating?

Alternating current

What are the main “current loops”—pathways for electric current to pass through the human body?

Arm-arm, arm-leg, arm-head, leg-leg, head-leg

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.

Pointing

The only instructional poster is “Grounded,” which indicates that the electrical installation is grounded and no voltage must be applied to it. Installation location – drive of switching devices. If a prohibition and an instruction sign are used at the same time, the latter must be posted in the foreground.

So we have provided posters and safety signs used in electrical installations. Please note that it is allowed to increase the size of the plates when installing them on large equipment. In this case, the magnification must be done in a ratio of 2:1, 4:1 or even 6:1. You can get additional information about sizes in SO 153-34.03.603-2003. We hope you now know what types of electrical posters and signs are divided into, and what are the conditions of use for each classification.

Prescriptive posters

Prescriptive posters are used to indicate workplaces (locations of work) in electrical installations, as well as safe approaches to them.

“WORK HERE” - indicates the workplace.

The dimensions of the prescriptive poster are 100X100 or 250X250 mm. Made in the form of a white square with sides of 80 or 200 mm, respectively, on a blue background. The inscription is made in black letters inside a square. The poster is portable.

“GET IN HERE” is also a prescriptive poster and is used when the workplace is located at a height; it indicates a safe way to climb to the workplace.

Poster dimensions – 100X100 or 250X250 mm. Just like the “work here” poster, it is made in the form of a white square with sides of 80 or 200 mm on a blue background. The inscription is made in black letters inside a square.

Poster Formation of grounding systems

Electrical safety poster. Formation of Grounding Systems-4

The most informative poster. Half of the PUE is outlined here. Anyone who studies this poster will have 99% of questions about electrical wiring eliminated.

Let me remind you once again that posters do not replace, but complement the PUE and other normative and educational literature.

And how to print such posters on several A4 sheets - I described in detail in the article about how to print a large diagram or drawing, or a poster.

Prohibition posters

Prohibition posters are used to prohibit actions with switching devices (turning on/off) so that when working on electrical equipment, voltage is not mistakenly applied to it.

“Do not switch ON OPERATION UNDER VOLTAGE again!” — this sign prohibits manual re-closing of overhead line switches without the approval of the work supervisor after they have been automatically switched off. Such posters are hung on the control keys of overhead line switches when repair work is carried out under voltage.

Poster dimensions – 100x500 mm, red border width – 5 mm. The inscription is made in red letters on a white background.

"DO NOT TURN ON! people are working” - a portable poster prohibiting the supply of voltage to the line. Must be posted on keys, buttons and control drives of switching devices, when turned on, voltage can be supplied to the line. Suitable for electrical installations up to 1000 V and higher.

The poster is made in dimensions 200x100 or 100x50 mm, the width of the red border is 10 and 5 mm, respectively. The inscription is written in red letters on a white background.

"DO NOT TURN ON! work on the line” is a portable poster prohibiting the supply of voltage to the line. It is hung on the keys and control drives of switching devices, the activation of which can supply voltage to the line.

Poster dimensions – 200x100 or 100x50 mm. The inscription is written in white letters on a red background.

“DO NOT OPEN PEOPLE WORKING” is a prohibitory poster that must be hung on valves and valves that shut off the air supply to pneumatic switching devices (switches, disconnectors), the erroneous opening of which can lead to the switching on of the device on which people are working.

Also, the “DO NOT OPEN people working” poster is posted on gas cylinders or pipelines (hydrogen, oxygen, etc.), the opening of which can lead to injuries to working people.

This prohibition poster is portable. Poster dimensions 200x100, red border width 5 mm.

Salicylate can turn on genes

Any operon has two sections involved in the control of protein synthesis from genes: the operator - the site where the regulatory protein binds to DNA - and the promoter - the site where RNA polymerase binds to DNA. The interaction of these two elements determines the activity of the operon. The NAH7 plasmid contains a regulatory protein responsible for the activity of two operons: naphthalene degradation (nahABCDEF) and salicylate (nahGHINLJK). The gene encoding this protein is located next to the second operon (Fig. 3). The regulatory protein has two equilibrium forms: inactive (NahRi) and active (NahRa). When salicylate is absent from the medium, this regulatory protein is inactive (NahRi) and it has no affinity for DNA. RNA polymerase does not attach to the promoter region, because without an active regulatory protein it cannot recognize this region as its landing site.

When salicylate appears in the medium, a regulatory protein (NahRa) is activated, binds to DNA and helps RNA polymerase anchor in the promoter region. Transcription starts and the enzymes encoded by the operons are synthesized. The process continues until all pollutant molecules are destroyed and no salicylate remains in the medium, which activates the regulatory protein. This protein will again turn into an inactive form, RNA polymerase will no longer recognize its landing site, and the production of enzymes will stop. This scheme makes it possible to produce the enzyme only when necessary (Fig. 4) [4].

Figure 4. Effect of salicylate on the expression of nah genes of the NAH7 plasmid

Classification of posters

According to GOST rules, posters are divided into several groups:

Prohibiting actions with switching devices (switching) in order to prevent voltage from entering current-carrying devices near the workplace. Labels are placed on switch control elements. The goal is to prevent contact with voltage from conductive elements at the work site.
Warnings about the close placement of live electrical equipment that poses a danger to others.
Prescriptive actions in compliance with electrical safety requirements.
Places on the electrical installation indicating grounding (locations of portable grounding).

Posters are divided into portable and stationary. They are produced as signs from dielectric material (different types of plastic).

On electrical installations with exposed live parts, it is unacceptable to use portable temporary metal signs. At a distance from live elements, metal plates can be used on electrical installations.

Indications of signs can be applied with paints through a stencil. The image must be resistant to industrial conditions or weather conditions. At electrical installations, on overhead power lines (overhead power lines) made of concrete or metal, and other similar places, signs are painted or glued with film.

When visibility is poor, signs need to be illuminated. At the same time, the colors need to maintain their natural appearance without distortion.

Types of signs (sizes, shape, inscriptions) are developed in accordance with GOST and TU according to which they are manufactured.

Prohibiting

“Work under tension. Do not turn on again” - to prohibit manual connection of the overhead line when the protection is automatically triggered, until the action is agreed upon with the line repair managers. Posters should be hung directly from the control elements of switching devices when performing repairs. Dimensions 50x100 mm, bordered with a 5 mm wide red stripe.
"Do not turn on. People are working” means a ban on connecting voltage to the facility where repairs are being carried out. The sign is hung on the control elements of switching devices. Dimensions 100x200 and 50x100; the border is the same, but can be 10 mm wide.
"Do not turn on. Work on the line” – a prohibition notice is posted on the control elements of switching devices that provide connection to the line. The dimensions of the poster do not differ from the previous one, and also correspond to GOST.

Electrical safety prohibition posters

Graphically, the signs are designed as follows:

background white;
red letters and border;
with white edging.

The image indicated in the last paragraph of the above list is distinguished by a red background without border and white letters.

Warning

The signs inform about the presence of current conductors in electrical installations that are located nearby and pose a danger (Fig. below):

“Stop! Voltage” (Fig. a) - posters used for substations (SS) and power plants (PP), on fences to conductive elements of closed switchgear (indoor distribution systems). When working from below from the ground to the outdoor switchgear, signs are hung or fixed on structures near the work area and placed in the direction of passage to live elements. The background with the edging is white, the border with the arrow is red, the letters are black. Dimensions – 300x150. The arrow image is made according to GOST R.
“Don't get in! It will kill” (Fig. b) - a warning about the location of energized electrical equipment at the top. The design of the sign is the same as in point 1. Dimensions – 300x150.
"Trial! Danger to life” (Fig. c) - the poster is portable and warns that tests are being carried out, and also that there is a danger of electric shock if you are inside a fenced area. Dimensions – 300x150. The design is the same as the previous ones.
"Dangerous! Electric field! Passage is prohibited without protective equipment” (Fig. d). The electric field generated by very high voltages (more than 330 kV) can also have a dangerous effect on humans when the voltage reaches 15 kV/m. The sign is permanent, located at a height of 180 cm on the fence of the site. Its dimensions are 200x100.
"Carefully! Electrical voltage” (Fig. e) is a sign made in accordance with GOST R - a warning about the danger of getting under voltage in electrical installations of substation and power plants, on the doors of transformer chambers, assemblies and switchboards, on fences of current-carrying elements. The image is a triangle with an arrow and a black border on a yellow background. Dimensions for doors are from 80 to 360 mm, and for containers with equipment – from 25 to 50 mm. On overhead line supports and outdoor switchgear fences, a border with an arrow is applied with paint, which should not be washed off. The background here is the base material.

Electrical Safety Warning Posters

Prescriptive

Signs are used to designate approaches and places for repairs at electrical installations, where it is safe to:

“Work here” is a sign to indicate a safe area.
“Climb here” - indicates the path to climb to a height.

The poster is made as a white square with black letters and blue edging (pic. below).

Mandatory posters are used to indicate safe approaches and locations for work.

Pointing

“Grounded” (Fig. below) – designation of the grounding location, indicates that voltage supply to it is unacceptable. Suspended on the switching elements of switching devices. The plate is made as a blue rectangle with white inscription (GOST R).

Sign indicating grounding location

Methods for making signs on film:

1. Full-color printing Used for small circulations (from 1 to 100 pieces) of medium-sized signs, small (from 1 to 50 cm2) stickers (circulations from 1 to 1'000 pieces) and large signs with circulations of one sticker. This method is direct large-format full-color photo printing with eco-solvent inks made in Europe on advanced Japanese Mimaki equipment, which allows you to obtain a high-quality full-color image

2. Silk-screen printing It is used in the production of medium circulations of signs: small (in size) - from 1'000 to 100'000 and medium - from 100 to 10'000 pieces. Silk-screen printing or screen printing is the process of applying an image to film by transferring it from a stencil (silk canvas with an image of a sign) in a semi-automatic mode. The size of the signs is also limited in size - no more than A1 format and colors - no more than 4, which is perfect for making almost all signs on film. When producing signs and plates using silk-screen printing, we use imported UV-curing (high-quality and odorless) paint made in Germany or Japan on a Russian-assembled semi-automatic screen printing machine

3. Offset printing Used for very large circulations of stickers (from 10,000) with a limitation on the size of the sticker (no more than A4 format). This method involves printing by imprinting a sign on film, but due to the complexity of preparing the circulation, it is used extremely rarely. When producing signs, ORACAL 640 film or its analogue with similar characteristics is used

CHARACTERISTICS OF PVC FILM:

Difference between signs and posters

The main difference between them is their purpose. In short, the function of signs is to inform about permanent factors, for example, to warn maintenance and repair personnel about the possibility of accidental contact with live structural elements. Accordingly, fixed places are provided for the location of these electrical protective equipment.

ES signs can be made of metal or dielectric materials; it is allowed to paint them or apply a film with a pattern. In the first case, when a metal base is used, the installation is carried out at a safe distance from live elements.

These safety equipment are displayed in accordance with their intended purpose. Unlike signs, they can be permanently located or portable.

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

Based on the name of these posters, their main purpose is to prohibit certain actions with switching installations, so that during maintenance activities on electrical devices they are not accidentally supplied with power.

“ Working under tension. Do not turn it on again! "- no one is allowed to re-turn on the overhead line switches after they have been automatically turned off, without prior consent from the work manager. This type of poster is hung on all overhead line control keys when repair work is carried out on live equipment (U).

" Dangerous! Electric field! Passage is prohibited without protective equipment ” is installed on outdoor switchgear with U exceeding 330 kV at a height of 1.8 meters on the fences of areas with U exceeding 15 kV per meter. It informs about the high probability of dangerous effects of an electric field on operating personnel and prohibits their movement in the work area without personal protective equipment.

" Do not turn on. People are working " is a portable sign used on electrical installations with U over 1 thousand Volts. It is installed on all drives, buttons and control keys of switching equipment and means that power supply to the line is prohibited.

" Do not turn on! Work on the line "is a portable sign installed on all drives and control keys of switching devices. It prohibits power supply to the line.

Full list of posters for the first part:

The second part is here.

Fittings of Vessels-2 – Safety Poster.jpg
Cylinder Gas Supply-3 – Safety Poster.jpg
Petrol Saw-1 – Safety Poster.jpg
Gasoline Saw-2 – Safety Poster.jpg
Petrol Saw-3 – Safety Poster.jpg
Explosion Fire Safety-1 – Safety Poster.jpg
Explosion Fire Safety-4 – Safety Poster.jpg
Explosion Fire Safety-5 – Safety Poster.jpg
External Lighting Devices_Steering Control-2 – Safety Poster.jpg
Sling-1 Selection – Safety Poster.jpg
Gas Welding-3 – Safety Poster.jpg
Gas Cylinders-1 – Safety Poster.jpg
Gas Cylinders-2 – Safety Poster.jpg
Gas Cylinders-3 – Safety Poster.jpg
Details Equipment Timber-3 – Safety Poster.jpg
Chiseling Drilling-3 – Safety Poster.jpg
Road Marking Vertical-1 – Safety Poster.jpg
Road Marking Horizontal-1 – Safety Poster.jpg
Arc Welding with Covered Electrodes-1 – Safety Poster.jpg
Arc Welding with Covered Electrodes-2 – Safety Poster.jpg
Arc Welding with Covered Electrodes-3 – Safety Poster.jpg
Reinforced Concrete Structures-4 – Safety Poster.jpg
Protective Equalization-2 – Safety Poster.jpg
Protective Equipment-1 – Safety Poster.jpg
Sign Alarm-3 – Safety Poster.jpg
Classification of Grounding Systems-1 – Safety Poster.jpg
Wheels Tires Engine-3 – Safety poster.jpg
Computer Safety-1 – Safety Poster.jpg
Computer and Security-2 – Safety Poster.jpg
Stairs Certain Types of Work-4 – Safety Poster.jpg
Metal rolling-2 – Safety poster.jpg
Harness Engaging Load-2 – Safety Poster.jpg
General Safety Precautions-1 – Safety Poster.jpg
Bucket Excavator_Earth Work Safety-1 – Safety Poster.jpg
Bucket Excavator_Earth Work Safety-2 – Safety Poster.jpg
Bucket Excavator_Earth Work Safety-3 – Safety Poster.jpg
Bucket Excavator_Earth Work Safety-4 – Safety Poster.jpg
Burns Poisoning Frostbite-6 – Safety Poster.jpg
Danger Zone When Operating Crane-5 – Safety Poster.jpg
Organization for Electrical Safety-1 – Safety Poster.jpg
Organization for Electrical Safety-2 – Safety Poster.jpg
Organization for Electrical Safety-3 – Safety Poster.jpg
Basic Requirements-1 – Safety Poster.jpg
Special Conditions-4 – Safety Poster.jpg
Stop Bleeding-3 – Safety Poster.jpg
Shutdowns in Electrical Installations with Voltage Above 1000V-1 – Safety Poster.jpg
Shutdowns in Electrical Installations with Voltage Above 1000V-2 – Safety Poster.jpg

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.

To make posters or signs catch the eye, contrasting or signal colors and their combinations are used for the background and inscriptions: red/white, blue/white, black/white, black/yellow

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.

The main document in which you can find information about electrical safety posters and signs is СО. It is called “Instructions for the use and testing of protective equipment used in electrical installations”

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.

Like other means of protection, signs and posters need to be properly stored and transported, and permanent ones must be in proper condition, that is, clean, dry, undamaged, with clearly readable inscriptions

Posters and signs are made in accordance with GOST. Unlike tools and clothing, they do not require markings and do not need to be numbered or otherwise marked.

The need to warn workers

Safety posters in electrical installations are needed to ensure the safety of personnel working at the enterprise. They provide early warning to people of electrical hazards to prevent injury and death in the workplace. Saving human life is always a priority task for any production manager, especially if we are talking about electrical installations.

Posters and safety signs in electrical installations are used to prohibit or permit the performance of certain actions when the voltage is on, to notify employees about connected devices, about the distance at which they can approach the switch, to indicate the direction and location of structures and units.

Types of signs according to GOST

There are regulations that regulate the types of information signs used to prohibit or restrict activities on equipment. In accordance with this classification, safety posters and signs come in several types:

Prohibition signs are products that inform about the prohibition of turning on or off the switching device in the panel during maintenance or repair work;
Warning posters. In this case, the signs perform the function of informing personnel about approaching dangerous power lines and other high-voltage elements;
Prescriptive signs are signs that are needed to determine the location of repairs or installation of equipment; they are most often placed by the senior foreman when planning line maintenance;

Mandatory signs

Directional poster. This tool refers to information plates that are for reference purposes and indicate the characteristics of the line, grounding or voltage type.

These are the main groups of signs and posters that can most often be found when installing, connecting or repairing electrical installations. You can also classify such products based on their location. First of all, they are of the stationary type - these are those parts that are installed on stationary objects for the entire service life of the units. Most often these are warning and prohibition signs with information about high voltage, the direction of the main line and the schedule for maintenance work.

You can also separately highlight mobile signs. Unlike stationary ones, these parts are mounted on objects temporarily and after repairs or other actions are completed they can be removed and reused.

Prohibition posters

Electrical safety posters of this type have regulated sizes and colors. Most often these are red symbols and numbers on a white background in a red frame. These signs include:

“Do not turn on again while energized” - this sign prohibits turning on the equipment without the consent of the employee responsible for performing the actions after it has been turned off. Most often, these parts are mobile and mounted on control units during maintenance or installation of new equipment. Dimensions – 100 by 200 millimeters, frame width – 5 mm. The letters and frame are made in red on a white background;

Prohibition sign

"Do not turn on! People are working." Here the poster is temporary and prohibits turning on electricity to the main line. It must be installed on switches, buttons and control levers of automatic switches, during the operation of which voltage can be supplied to the conductors. Used for power plants up to 1000 V and higher. The color design in this product is in the form of white letters on a red background, dimensions can be 200 by 100 mm or 100 by 50;
"Do not open! People are working." A prohibitory poster that must be hung on gate valves and valves, as well as ball valves that shut off the air supply to pneumatic switching devices (switches, disconnectors).

Important! Untimely start-up of such units can lead to the switching on of the device on which people are working, which will lead to an emergency situation. The design and dimensions of the plate are the same as in the first sign of this list.

Note! Prohibition signs used to maintain safety in electrical installations are categorical in nature, therefore their compliance is mandatory for all workers and services.

Warning posters

They are for informational purposes only and call for caution in any area or near electrical equipment. This type of plates includes:

Stop! Voltage

“Stop! Voltage" is a warning poster that belongs to a group of portable signs that informs about proximity to power lines with voltages of up to 1000 Volts. Most often it can be found near high-voltage lines laid externally by fastening them to reinforced concrete or metal supports. The size of the poster is 300 by 150 mm, it is made in the form of a red frame on a white background and black letters;
“Don’t interfere, it will kill you” is one of the most common signs, installed on almost all transformers and automatic power-off units. Providing information in such a harsh form is fully justified, since the consequences of interfering with the operation of such equipment can harm human health. This type of poster can also be used on power line poles as directional signs signaling the repairman about the rated current on the conductors. The size of such a plate is 300 by 150 mm, black letters on a white background with a red frame 15 mm wide. It is allowed to place a zigzag arrow on the sign indicating a lightning strike;
"The test is life-threatening." This is an information poster that warns of the danger of electric shock when conducting tests on a high-voltage main line. Such signs are used on workplace fences during work on high-voltage lines and equipment. The dimensions of this sign and the design style are the same as in the previous case;
“Dangerous electric field, passage is prohibited without protective equipment.” A poster that provides information about the possible impact of electric fields on installers or maintenance personnel, and also prohibits the passage of people without wearing a special suit with a rubber dielectric coating. Installed on power units in which the voltage exceeds 330 kV at a height of 150-200 cm on the fences of areas where the electric current intensity is higher than 15 kV/m. In such places, the electromagnetic field is below normal, and therefore can have a detrimental effect on the human body;
"Caution, electrical voltage." This poster differs from other warning signs in its shape, which looks like an isosceles triangle with a zigzag lightning bolt inside. This type of plate must be used on all power installations and on some electrical equipment that operates on direct or alternating current above 220 Volts.

Warning posters allow you to maintain electrical safety at any facility; in addition, they can indicate information about the rated voltage on the line, the type of current flowing and the maximum load.

Prescriptive posters

Most often they can be found at facilities that are subject to repair or maintenance; they designate lines and panels planned for equipment replacement. There are no strict regulations on the type and format of the inscription on such a plate, since it is only advisory in nature. One of the most common details is the “Work here” sign; it has the shape of a square with sides of 250 by 250 mm, with a blue frame and black letters on a white background.

Prescriptive posters

This group of posters also includes a sign indicating the direction to bypass the dangerous area. Such a sign must be duplicated with a warning sign “Caution, electrical voltage”; this is necessary to focus attention on this area of the area.

Directional poster

Refers to informative signs, performed in any form. Its field can indicate any information relating to the electrical main and its performance, technical and operational characteristics.

Important! If directional and prohibitory posters are used in the same place, the directional poster is hung on top of the prohibitory ones and has a primary position - it must be read first.

Thus, when carrying out any work on an operating line or electrical equipment, in order to comply with safety regulations, it is necessary to install the specified plates of the appropriate class and size. Ignoring the rules for operating and repairing power plants can lead to an emergency situation and injuries among operating personnel.

Types of hazardous location markings

There are several types of safety posters in electrical installations:

Prohibition signs notify that you cannot perform any action or turn on electricity when work is being carried out, do not move around the territory without special protective equipment, in order to prevent an error when supplying current to the workplace.
Warning posters indicate the danger of being on or approaching live parts, connected wires, or high-voltage equipment.
Mandatory signs give permission to perform an operation using a given place or apparatus, approach elements that are already de-energized, and recommend fulfilling certain requirements.
Indicative posters show employees the location of various devices in production and the direction of movement to objects of interest.