1. Zagalni vimogi from security technology
1. Individuals not younger than 18 years of age are allowed to work with a portable electric power station, as they passed first when entering the robot medical look, who passed the first entry to the work station instructing the electric installation.
2. It is necessary to remember that you cannot:

• sticking terminals and electrical wires, lighting fixtures, sockets, electrical switchboards;
• deprive without a trace of electric heating accessories, included in the electric circuit;
• scorch with electric dust, tiles, a kettle without special fire pits;
• stick to the water, which is heated, and the vessel (metal) with the electric heater switched on in the railing;
• vikoristovuvaty paper or fabric like a lampshade for electric bulbs.

1. Before turning over the correctness of the rosette of the wire, the plug and the wire cord, for damage to the insulation.
2. First, notice the device, respectfully recognize the helper of the operation, and remember about the outside, come in:

• unique overheating, as well as the fall of the water that saw inside the apparatus;
• do not put important objects on the case;
• don't block ventilation open, stinks are necessary to prevent overheating;
• To get rid of unfortunate vipadkіv, do not turn on the device when it is taken.

1. Dbaily set to electric shock: do not throw yoga, lay it carefully on a dry and clean place in sight, avoid falling, do not hit hard objects on technical problems, do not allow the device to fall into the water.
2. At the time of the supply of the strum, the hour of work is with the electric power, or in the break of the work, in the wake of the yogo in the electric power.
3. Persons, like koristuyutsya electrical installations, are protected:

• choose and carry out repairs independently
• trematisya for an hour of work and obladnannya.

1. At the time of the vindication, please call 01.
2. The extinguishing of fires is carried out negligently from the moment of manifestation. To extinguish the vicorist, fire extinguishers and the possession of fire faucets.
3. Electricity, what to burn, what to know under the pressure; it is necessary to extinguish with carbon dioxide or powder fire extinguishers. Vykoristovuvat water for quenching - zaboronyaetsya.
4. When a broken electric dart is detected, which hangs or hangs on the ground (earth), do not get close to the new one, negligently alert the administration, stay in the city ahead of others.
5. At different times electric jet it is necessary to turn on the tension nega- tively , and if the victim is unable to do so, it is necessary to use some kind of safe way to turn on the struma.
6. In the event of an injury to the victim, the struma is hindered by tossing around with bare hands.
7. Give the injured pershu a medical aid.
8. About those that happened, talk about your bezperedny kerivnik negainno.

1. Get rid of the barriers of possession.
2. Organize the work space.
3. Pick up the bones in the bowl individual zakhistu resolutely wimiti hands with cute.

11.1 HEAD POSITIONS

Electrical safety - the whole system of organizing technical entries that zasobіv, scho protect people from the enemy's electric shock.
Whether it be the initial mortgage, with a wide stock of electrical appliances, it is always possible to be safe from electrical injuries.
Knowledge of the basic rules for the installation of electrical installations and first-hand obov'yazkom vchitelіv, adminіstrаtsії і uchnіv.
The body of a person is a good conductor of an electric stream, so the rest can be injected into a new thermal, electrical and biological activity. It is not safe to add electricity to a person in terms of magnitude, trivality and other parameters of the stream, as well as in terms of individual powers and becoming an organism.
Looking at the patterns of damage by an electric strum, you can see two characteristic sights. The first one is considered to be an electric shock, and the other one - to a minor electrical injury.
Another type includes damage to tissues and organs by the strum, including opium, metalization of the skin, mechanical damage, and blindness.
The size of the struma, which is to pass through the people, lie in the tension of the fence and the support of the yogo body. Opir body is a value that changes from 8000 to 100000 ohms, and in the water area it is less than 1000 0m.
It is important for a safe person to have a voltage of less than 36, and in applications especially unsafe -12 V.
The main causes of electric blast injury are:
- a tipping dot to the stream-guided parts, which are under the pressure (bare darts, contacts of electrical equipment, tires too thin);
- nespodіvane viniknennya naprugi there, de in normal minds її not guilty buti;
- the appearance of a voltage on the switched-on parts of the electrical control (through the turn-on, the voltage induction by the dry installations is thin);
- faulty voltage on the surface of the earth due to the flickering of dross from the ground, faults in the grounding outbuildings.
In order to intimidate the electric storm, follow the rules of electrical installation extensions (PUE), the rules of technical operation (PTE), the rules of safety engineering (PTB). Individuals are allowed to work at electrical installations, as they have passed the training and may be recognized.

11.2. VIMOGI DO PRIMISCHEN KABINETIV, MAISTERNICH

For safe and healthy minds, it is necessary to train that work and learn the mother of the application of normal growths, which comply with sanitary and hygienic standards.
The area of ​​school premises is due to the satisfaction of VSN-50-86 "Healthy educational schools and boarding schools", the nomenclature of types of schools. The application of guilt should be light, dry and warm, with equal, not slimy underlays without vibra- tions and slits; the surface of the walls, the insole and doors - smooth and matte; radiators and pipelines of the scorching and water supply systems with a dielectric (wooden) fence.
The area of ​​offices (laboratories) can be between 54-72 m2, the height of the place is 3.3 m.
The area that falls on one student can be no less than 4 m2, and the volume - no less than 15 m3.
The temperature in the cabinets and mains is not lower than 16-18°С.
Washbasins with hot water and electric dryers are installed near the mains.
All nurses have first-aid kits with a set of medicines for first medical aid.
The least illumination in the mains from the metalwork and woodwork can be: with fluorescent lamps - 300 lux; with heating lamps - 150 lux, for sewing machines it is 400 and 200 lux.

11.3. ELECTRIC STRING

To the cabinets and mains, sound a chotiripprovidna tether with a voltage of 380/220 V to a dead-earthed neutral and connect to a rose-plated shield (RShch). The body of the shield may be buti obov'yazkovo grounding. Guards are mounted on the shield, which serve for the defense of the fence in the event of revantation and short chimes. The activation of that switch-on of the shield is controlled by a knife switch or by the head machine.
Dali go group commuting outbuildings. They can be knife switches that come out of the guards, just guards or automatics.
The electrical wiring to the working tables or the electrical installation is to be blamed, but it is done in such a way that the possibility of damage to the insulation, shaving of the wires, and short flickering is switched off. For the protection of mechanical damage, the wiring is guilty but it is nadіyno protected. With the help of the method, slab with a hooked id or close it with coils, a channel bar, a metal sleeve, etc. Sound the laying of the power wiring to slab around the light.
When choosing a brand of wires, ensure the nature of the application, the method of laying, the parameters of the struma. The transverse section of the streak-carrying fluids is responsible for the streak drift.
The supply of wires and cables to the electrical installation can be delayed and timely. In the first place, the water supply is attached to the clamp, or the electrical commutation outbuilding (for example, the verst), in the other, they are socket outlets. Here the connection of the electrical appliances themselves is connected bent wires and hoses.

11.4. SAFETY RULES FOR CARRIED OUT LABORATORY ROBOTS AND DEMONSTRATION CONTROLS

Carrying out laboratory work, the teacher of goiter, learn to learn the correct and safe cause for the possession of the laboratory, constantly follow the entry of electrical safety. The cob of skin independent laboratory work can be re-instructed in safety techniques and registration of yoga in a special journal.
Learning is the responsibility of the nobility, how to prepare for laboratory work, how to carry out such completion.
Start preparing for the job until you are familiar with the settings, accessories, diagrams, and the nature of the robot. Here, however, an experiment could be carried out with the method of acknowledgment in them of the quality of training.
Then follow the laboratory work. Learn how to choose a scheme, complete the control and simulation accessories, work out your own model of a future installation. Let's guess that all these operations stink without connecting to the electric line.
After re-verification, the installer of the installation or the scheme is expected to command the inclusion of the measure. As if there are some malfunctions (scaling the accessories, cracking the contacts, then), the installation should be switched off in the wrong direction, to know the reasons for that.
Under the hour of laboratory investigations, there was no tornado assembly darts, clamp, vimiryuvalni attach.
After the completion of the experiment, or after the demonstration to the laboratory, the installation is turned on in a row, and then it is not enough to sort it out.
The laboratory robot is being completed by folding the light, arranging the fittings for the entire work area.
As soon as the process became busy, it was struck by an electric jet, it was necessary to turn on the voltage in a negligent way. The point of notification and inclusion of the measure is due to buti vіdomy usіm uchnyam.

11.5. TECHNICAL MAINTENANCE AND REPAIR OF SCHOOL HOLDING

Call for maintenance and repair of the high school education is not allowed. This operation is to be qualified by the qualifications of specialists, which may give them access to work.
However, there are future teachers of the nobility’s labor education, not only the power of possession, but also a safe service, repair of yoga. Electric machines and equipment for the main electric schools and schools. correct technical operation electrical outbuildings, not only for the safety of the work of the entire operation, but also for the safety of the working staff.
PTE and PTB allow maintenance of electrical installations up to 1000 for personnel who have a qualification group of at least 3.
Vidpovidno to PTE vimikachi, contactors, circuit breakers and other ballasts of the responsible mother of a readable letter, which indicate to what kind of electric motor the stink lies. Windings in the form of windings of electric motors and their parts, which are wrapped, are to be covered with fences. The "start" and "stop" buttons are installed directly at the mechanism that is aimed at the ruh.
The electric motor is guilty of buti negligently switching on the wires in such cases:
1. an unfortunate slip from a human being, which causes a negainous tooth to an electric drive or a mechanism;
2. appearing dima, fire from the electric motor or from start-up and control equipment;
3. Vibration is unacceptable or a breakdown of the mechanism that is driven into motion;
4. unacceptable heating of bearings;
5. a sharp decrease in the frequency of wrapping, which is accompanied by a quick heating of the electric motor.
The maintenance of the electric drive includes a periodic technical inspection of the electric motors and equipment, and a look after them: cleaning, oiling, replacing worn parts, vibrating and adjusting the other parts.
Maintenance of electrical equipment at the vikonann offensive robots:
§ systematic prophylactic review;
§ cleansing (usunennya saw, brudu thinly);
§ change of burnt fusible inserts and wear parts;
§ reverification of grounding superficiality;
§ cleaning and regulation of contacts;
§ viprobuvannya (vimiryuvannya struma and tension spratsovuvannya, insulation support).
All works for repair, adjustment or testing of electric motors are turned on with a knife switch, an automatic machine or a contactor, on the handles of which there is a poster "do not turn it on - people work".
If for an hour to repair an electric motor, the life cable is exposed to the stator clamps, then the end of it must be short-circuited and grounded. All repair works are made out by an entry in the operational journal, including the display and removal of posters to be fenced. AT operational log the nicknames of an outstanding individual of that vikonavtsia are recorded.
Upon completion repair robots diligently climb the robotic space and conduct a trial run.

11.6. SAFETY DURING THE EXCURSION

It is reserved to conduct excursions to enterprises that use vicorous blasting speech, radioactive elements, various X-ray installations and high frequency installations that can operate electroplating workshops, as well as to enterprises with gas distribution facilities, sawmills.
Excursions to objects that may be possessed, depending on which students can take away injuries (electrical welding, metal melting, etc.), are carried out only in quiet situations, if the administration of the enterprise is provided with special clothing and the methods of individual protection.
Conducting excursions near the premises with battery installations is allowed only for normally air ventilation.
Be aware of the electric power for one hour of excursions; it is not allowed to stick around with the hands of various accessories, press the button, enter unsafe zones, and enter groups.
The guides of the excursions are responsible for the implementation of the rules of safety technology, industrial sanitation and the protection of life and health of students. Before a skin excursion, it is necessary to know the characteristic object, follow the route to the other side. On the tour, you can take part no more than 25 people. Tourists are afraid to carry out whether or not they are drunk on the object of the excursion. In times emergency situations on a local excursion, sightseers should be taken to a safe place in advance. After the completion of the excursion and the exit of the students from the object, the clerk rechecks the presence of them behind the list.

11.7. PROTECTION OF PRACTICES DURING THE VIROBNICHOY PRACTICE FOR ELECTRICAL ENGINEERING AT INDUSTRIAL OBJECTS AND BUILDINGS

The practice of students in electrical engineering may be different industrial objects.
At whom we are divided, we are less likely to work on the objects that are responsible for electrical installation work,
Organization of work with safety equipment at transmission facilities:
§ acknowledgment of osіb, vіdpovіdalnyh for safety robіt. Such persons are viconrobi, chiefs of departments, maisters and foremen of assembly teams;
§ inclusion before the project of vikonannya robit solution of how to create minds for a carefree and non-neshkidlivy vikonannya robit, from sanitary and hygienic services to workers, to ensure sufficient illumination of the weekly maidanchik and working areas;
§ promotion of advanced work clearance causative injury;
§ briefing h safe methods robots at work stations;
§ organization of offices for safety equipment.
For the need of vikonannya electrical installation robots at workshops and on the territory living enterprises goiter care careless chicanery work and safety of practical workers, shards for electricians vinicating the addendum of the problem from the side of the virobnichego obladnannya and working electrical installations.
All installation works on jet-guiding parts (or near them), as a rule, are to be vikonuvatsya when the pressure is removed.
During the installation of electrical installations, various machines, mechanisms and attachments are installed, which will make it easier for the work of the installation workers and ensure the safety of mind safely roboti.
In addition, the mechanization of electrical installation robots plays an important role in increasing the productivity of work, short terminology in the installation of electrical installations, and ensuring a high level of efficiency of work.
Inevitably caused by mechanisms and attachments, as well as stasis in a faulty station, can be the cause of injury during installation work.
Modern electrical installation practice has a wide variety of mobile mains with the improvement of vintage cars.
For mounting repeated lines automobile telescopic towers and pylon cranes are victorious.
For the operation of important parts of electrical control, zastosovuyut manual and electrified winches, hydraulic jacks, hoists, blocks, jacks, autonavantazhuvachi and other.
The most unsafe є pidyom that the installation of supports of the overhead lines.
As if lifting a single-pillar wooden support, it is built by hand, it is necessary to coristuate with hooks and stags, and for morning support - with drawstrings from the mother's hanks. Under the hour of lowering the lower end of the support into the pit, none of the workers is guilty of resting in the new. It is not allowed to fill the foundation pit with an installed, but not sizzling with soil support.
Electricians are responsible for learning the signals, for which they regulate the height of the heights or lowering.
For the presence of a telescopic ladder or another hero, the installers climb onto a support for additional fitters' claws.
In order to avoid blows and injuries when falling from the height of any details, or the tools are fenced off under the support, or the stake of the pylon is working for an hour, and it is also not allowed to throw off objects from the height of the support.
When supporting important parts (reinforcement, cable sleeves, etc.), it is necessary to wrap it with a special winder, throw it over the block.
When rotting a naked dart from a drum, it is necessary to scorch with canvas mittens.
Before the installation of new lines on the entire route, they will install forward posters or guard posts.
It is fenced to lift the darts over the saline stakes under the hour of the rush of trains.
During the installation of repeated lines on wooden supports, various antiseptic measures should be taken against the rotting of the wood. The melting of bitumen or rose creosote is carried in buckets, filled by 3/4 volume, with tarpaulin cases. Carry the bucket with antiseptic on the poles, and not on the shoulders.
Under the hour of transfusion of roses of antiseptics, and also, when smeared with them, the village should be careful not to get a breeze of melted speech on the exposed part of the body; it is necessary to practice in zahisnih eyepieces and canvas mittens. Opkiki vіd rosіgrіtih antisepticіv duzhe bolyuchi.
In this hour, a significant part of the work and laying of the lines is mechanized, which reduces the risk of injury.
Drum lift with cable for expansion is installed with cable jacks, and a steel shaft is inserted into the opening of the drum, which serves as a winding of the drum. Rozkochuvannya cable is carried out by a special winch.
The most productive way is to cut the cable behind an additional pipe-laying machine, on the boom of which a drum is moved.
When manually laying the cable, the load per worker over 18 years old (persons) cannot exceed 50 kg.
For laying the cable along the walls of the building at a height of 2 m and more, install the stone scaffolding from the fence near the handrails and side boards (before the flooring). Behind the minds of safety, it is not allowed to lay the cable from the exits.
Filling of cable boxes and virv pov'azana z nezapekoyu op_kіv cable mass, heated to a temperature of approximately 120°.
Rozіgіv masi slid is carried out on the brazier of an electric oven, not allowing boiling. Mixing is carried out with a metal twig or with a spoon. It is not allowed to get into the rozіrіtu masu vody, which can cause її rozbrizkuvannya.
Nebezpeka opіku can also be blamed when soldering cable cores and cable tips. Solder is melted at a steel cauldron and carefully poured with a steel spoon at lucky zatiska or cable tips. Practice is required in canvas mittens and outside eyepieces.
When installing cable embeds in epoxy sleeves, the damage to the shafts and hands is caused by epoxy resin and especially hardening. If these words get on the skin, the skin can become ill - dermatosis. In addition, teasing of the mucous membrane of the eyes and the upper dychal passages is not included.
In order to prevent getting on the screen of speeches, they should wear gum or polythene mittens, put on aprons, put on eyepieces.

11.8. FIRST AID IN THE EVENT OF ELECTRIC STREAM

Even though the sufferers are not able to walk in the presence of an electric stream, you need a negaina for help. For the sake of the injured, it is necessary to get used to the safety, so that you yourself do not waste the stress. If possible, it is necessary to turn off the electrical installation with the nearest switch. For the presence of such feasibility - cut or cut darts, cory with tools with insulated handles.
If it is impossible to turn on the electrical installation, it is necessary to remove the damaged water from the strum parts. It is possible to work, pulling the victim by his clothes, with which it is not possible to drag the body of the victim. You can speed up with other insulating objects.
After the sound of the victim in the form of a struma, it is necessary to give it to you negatively dokarsku help I will definitely become yoga. Even if the sufferers are not uneasy, it is necessary to bring it to the aid of the hand for help, to calm down, to drink water, to ask to lie down. If, in case of tsoma, injuries were revealed in the victim, - give help to the militia and help the doctor. For consumption, send the victim to a medical center.
As if the patient is resting at an unfamiliar camp, then he breathes normally and a pulse is heard in the new one, you need to call the doctor nego- nally , until you get there, give help on the spot - bring the victim to you: give the smelter of ammonia, lightly soak the victim with water.
If the patient is interrupted by an important station, then do not hesitate, but rather breathe importantly, urgently, often, necessary, without delay, proceed to piecework. One hour after the call of the doctor.
Preparing for piecework. Zvіlniti the victim in the robe, sho squeezing, - loosen the comir, untie the scarf, loosen the belt, etc. Lay the victim on his back, under the shoulder blades - a roller from the folded robe. Put one hand under the victim and, pressing the other hand on the forehead, throw your head back as much as possible, with which the mouth opens, the tongue opens the throat. Open the mouth of the injured person against third-party objects, bleed dentures.
Vikonannya piece dihannya mouth-to-mouth method. The one who gives help puts one hand under the victim, with the other hand presses on the forehead, throwing her head back as far as possible, and immediately squeezes the victim (Fig. 11.8.1). Having robbed two or three deep breaths and saw, then deep breath, apply a company to the victim’s company, and blow the breath again in the victim’s legend. In this order, after 10-12 blows into the quill - through the skin 5-6 s - one blow. After skin injection of obov'yazkovo zvіlnyat the mouth and nose of the victim for the release of the third legeniv.
When you breathe in, you can see how the chest cell of the victim expands, when the chest is released, the chest shrinks. With the appearance of the first weak breaths, time the ear of the piece breath at the time of the ear of the independent breath of the victim. A piece-meal is carried out until the beginning of a wet, deep and rhythmic breath.

At the same time, it is necessary to carry out an external (indirect) massage of the heart at the same time in case of a heartbeat or fibrillation of the victim for the treatment of blood circulation. For whom, the one who hopes to help is guilty of rotting on the knees on the side of the victim. Having marked with a path the matsuvannya of the onslaught - lower third sternum, as shown in Fig. 11.8.1. the one who gives help is guilty to put his hand down on the new one. The palm of your hand is superimposed on the front under a straight kut. Onslaught next, helping you with the arrogance of the entire body, liktovі suglobi due to buti rozіgnutі, arms straight. The fingers of both hands are to blame at the same time and do not touch the chest of the victim. Repeat the onslaught of the next at least 1 time per second. It is not possible to push on the upper part of the sternum, on the ends of the lower ribs, but the shards can lead to a fracture. It is also impossible to push the lower chest cell onto the soft tissue, so as not to mess up the organs here, in front of the liver, and not to call for vomiting.
One person is supposed to help me, I’m guilty after two deep blows into the mouth, or without the injured 15 push on the chest, then again two blows and push again 15. When drawing a piece of breathing, that massage of the heart, a pause can be minimal. Offensive manipulations are carried out from one side.
For help, I’ll give two more help, one of them is guilty of performing a heart massage, the other is a piece of breathing, with which one blowing is carried out, then five squeezes on the chest.
Piece-by-piece breathing is necessary to carry out until the confirmation of stable breathing and activity of the heart, or until the first transfer of the injured medical personnel.

Practical work to protect work initial mortgages. Electrical security in the classrooms and laboratories of the school

Electrical security in the classrooms and laboratories of the school

Meta work: get to know about electrical safety in the classrooms and laboratories of the school and master the individual and the hard way, come in and out of the electric stream.

Meals for the wedding:

1. Individually and wildly come in to the front of the electric stream.

2. Removing the support for grounding wiring.

3. Vimiryuvannya support insulation.

Under the electrical safety, to understand the system of organizational and technical inputs and zasobiv, which will secure the protection of people from the unsafe infusion electric stream, electric arc, electromagnetic field and static electricity.

Individually and zagalnі come in to zahistu from the electric stream

Greater, high-school equipment, technical aids for training, which are installed at the high-lighting schools, 220 V.

Before turning on the electrical control in the tether, it is necessary to change the front in the correctness of the fusible protectors and the strength of the struma and the tension of the tether, on the yak of the re-roofing of the apparatus. Failure to follow this rule can lead to a frenzy of the apparatus, and be the cause of an unfortunate drop.

It is not possible to include electrical equipment with caps removed, because it shows details that are under an unsafe voltage (for example, for televisions, the voltage is to become a thousand volts).

In case of faulty equipment failures in the process of work, it is possible to proceed to repair only after switching on the system.

For the zahistu of people in the form of an electric strum, they will zastosovuyutsya for the sake of an individual and a wild zakhist. As an individual way to protect yourself, you can use electric gum gloves, galoshes and boots, kilimki, supports on insulators, hand tools with insulating handles, voltage indicators, and glass eyepieces (Fig. 11.3.1).

Rice. 11.3.1. individual needs zakhistu vіd electric strumu

Before the scorching zabіv zakhistu vіd vіd vіdnya elektrichnym strum next vіdnest: electrical insulation stream-conducting wires and power tools, mechanical fences, installed transverse writings. For usunennya nebezpeki, pov'yazanoї s the transition of the voltage to the non-permanent parts, serve as a special entrance - grounding, zeroing that shutdown.

Zahisnym groundings are called electrical groundings from the ground of metal non-current-carrying parts of the possession, as they can be supported by a voltage, for an additional extension, grounding with a support of no more than 4 ohms.

Grounding of electrical installations must be grounded at voltages of 42 V and 110 V promoted by unsafe, especially unsafe ones in modern electrical installations. To such a place for the minds of the school one can see, for example, school masters. Zahisne grounding zastosovuetsya to reduce the voltage of the dotik to safe values ​​and the safe switching on of the electrical installation when the phase is shorted to the case. At the time of the phase short circuit on the case for the presence of the grounded case of the matime phase voltage like the earth, and the man, who bumped into yoga, uses the pressure of the dot, equal to the phase one. When present zahisnogo grounding the voltage on the body will be significantly less than the phase, and the stream through the person will be safe (Fig. 11.3.2).

Rice. 11.3.2. Zakhis grounding scheme three-phase mesh snake struma

Zakhisne zanulennya - the price of navmisne electrical connection with zero zahisnym (grounded) drotom metal parts obladnannya, yaki can opine under the pressure. The sense of zeroing is due to the fact that it will turn the phase flicker to the case on a single-phase. short chirp, in the aftermath of some spratsovuє maximum strumovy zahist (burning out the guard), including the poor litter of the merezhі. For security promotion zero wire ground at a number of points (Fig. 11.3.3).

Rice. 11.3.3. Scheme zahisnoy zanulennya at the three-phase line of the snake struma

Zahisne inclusion is the best way to protect against the appearance of unsafe tension on the constructive parts of the possession. For the help of a special automatic machine, it will be safe to switch on a random installation at a different time on the cases of unsafe voltages.

Corpusi electrical machines, devices and other metal non-conductive parts can be supported by a voltage when the insulation is damaged. In this way, the dotik to them can be so very unsafe, like to the non-isolated strum-leading parts. The severity of the damage to the human body to lie, mainly due to the strength of the strum, the genus of the strum, the hour of the spleen, the value of the strum, which is to pass through the life of an important organ. The strength of the strum, which passes through a person, is indicated by viraz:

Ih \u003d Upr / Rh,

de Rh - opir of the body of a person, Om; Upr - voltage dotik, Art.

Table 11.3.1 shows the nature of the influx per person of the various values ​​of the changeable stream of the commercial frequency and the steady stream.

Table 11.3.1. Threshold value of struma

Careless vvazhetsya change strum up to 0.5 mA and constant up to 2.0 mA. The most unsafe sounding strum with a frequency of 50-500 Hz.