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börja lära sig
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To give the basic knowledge of electricity - as much as to be able to recognize the danger of electricity and to avoid it
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Electrical Qualification of persons börja lära sig
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Ordinary Person; Instructed Person; Skilled person
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börja lära sig
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Person without any qualifications
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börja lära sig
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A person adequately advised or supervised by skilled person to enable him or her to avoid dangers which electricity may create
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börja lära sig
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A person with reevant education and experience to wnable him or her to avoid dangers which electricity may create
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Threatening danger on electrical equipment börja lära sig
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accident by electric current; fire; explosion
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Every employee must get at least the lowest qualifications börja lära sig
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according to government regulation No. 194/2022
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börja lära sig
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These are the employees (ordinary persons) acquainted with regulations on treatments with electric equipment and aware of the possible danger of electric current
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börja lära sig
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Safety Extra Low Voltage; Extra Low Voltage; Low Voltage; High voltage
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börja lära sig
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börja lära sig
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a.c. 50 V to 1000 V; d.c. 120 V to 1500 V
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börja lära sig
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a.c. > 1000 V; d.c. > 1500 V
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Allowed Activities (operation) Part 1 börja lära sig
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1. They can independently manipulate only electrical equipment of a SELV; and low voltage but pnly if they cannot touch the live parts during a normal operation. 2. Switching on and off, plugging into the socket, moving connecting cables, exchange of bulb when switched off and exchange of safety fuses
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Allowed Activites (operation) part 2 börja lära sig
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3. They can perform maintenance work without the dismantling with instruments (dry cleaning) when the equipment is switched off. 4. There must be a safe distance from unprotected working parts unfer voltage up to 1 kV at least 1 meter
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Forbidden Activities Part 1 börja lära sig
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1. To repair electrical appliances and distribution network. 2. To work on parts of electrical equipment under voltage. 3. To use electrical equipment suspected of damage
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Forbidden activities part 2 börja lära sig
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4. To move electrical appliances connected to the network (computers, calculators etc.) unless they are intended for such usage - (electrical hand tools) - unplugging of the socket. 5. To touch electrical equipment by wet parts of the body. 6. To clean the surface of electrical equipment by wet means
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börja lära sig
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conducting part which js intended to be energized in normal use, including a neutral conductor
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börja lära sig
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conductive oart of electric equipment, which can be touched and which is not normally live but which can become live when basic insulation fails
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börja lära sig
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insulation of hazardous live parts providing the first protection against electric shock
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börja lära sig
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börja lära sig
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contact with exposed conductive parts, which have been become live under fault conditions
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börja lära sig
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all activities necessary to permit the electical installation to function both under normal and abnormal conditions
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börja lära sig
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any form of work where there is possibility of an electrica hazard
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börja lära sig
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work on, with or near electrica installation
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Characteristic features of operation börja lära sig
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Direct contact no; application of tools no; Duration of changes temporary
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Characteristic features of work börja lära sig
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direct contact yes; Application of tools yes; duration of changes permanent
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Risk of common computer users regarding Health and Occupational Safety börja lära sig
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increasing eye-strain (brightness, blinking); electromagnetic radiation; strain to the neck-spine
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Safety work with computers börja lära sig
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1. the worker at the screen shall have neither the light source nor its reflection in the range of view. 2. the brightness of the objects in the neibhourghood of the screen shall be balanced so as nor to produce big contrasts. 3. distance from screen at least 40cm 4. the artifical enlightning of the room shapl not form dark nooks and overlight places - the upper margin of the active area of the screen shall be on the eye level maximum
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Safety work with computers part 3 börja lära sig
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if possible place a monitor in such way as to prevent the people from having access from its sides
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safety work with computers 3 börja lära sig
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1. the placement of the keyboard: if sitting straight, the arms, placed with their palms on keyboard shall be perpendicular at the elbows. 2. the height of the seat: if the soles are fully tread-down on the floorc the legs shall be perpendicular at knees
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börja lära sig
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börja lära sig
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prohibition - white sign with red circular band and crossbar text black
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börja lära sig
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mandatory action - circular
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börja lära sig
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warnjng - yellow sign with triangular band
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börja lära sig
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information - rectangular
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safety limits of steady electric current börja lära sig
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threshold of perception ac 0,5mA, dc 2mA, charge 0,5uC; Threshold of pain ac 3,5mA, dc 10mA, charge 50uC; Let go current ac 5mA, dc 25mA
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limit of selv at live parts börja lära sig
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usual and wet conditions: ac 25V, dc 60V; Very bad conditions - -
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limit of selv when not direct contact börja lära sig
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usual and wet conditions ac 50V, dc 120V; Very bad condtions ac 12V, dc 25V
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the highest permissible touch voltages börja lära sig
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same as contact with live parts: a) permanently acting touch voltage; b) short-term acting touch voltage
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