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Professional competence in electrotechnics according to Act 50/1978 Coll.

Professional competence in electrotechnics according to Act 50/1978 Coll. Workers instructed - §4 (without professional training or experience, only within laboratory training at the FBMI, not valid outside the FBMI).

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Professional competence in electrotechnics according to Act 50/1978 Coll.

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  1. Professional competence in electrotechnics according to Act 50/1978 Coll. Workers instructed - §4 (without professional training or experience,only within laboratory training at the FBMI, not valid outside the FBMI)

  2. Workers instructed (§4)- without requirements for professional training or experience • were familiarizedwithin the scope of their activities with the regulations for the operation of electrical devices by the organization, • were instructed in this activity, • were warned about the possible dangers of electrical devices, • were familiarized with the giving of first aid during electrical current accidents.

  3. The danger of electrical current accidents depends mainly on: • the source voltage, • the current frequency, • the wave or pulse shape, • the duration of the current’s passing through the organism, • the current path through the body.

  4. Symbology and signs in electrotechnics – the meaning of safety colours

  5. Symbology and signs in electrotechnics – the safety meaning of geometric shapes

  6. Symbology and signs in electrotechnics – safety notice examples 1) ČSN IEC 417

  7. Restriction sign Direction sign Warning sign Information sign Symbology and signs in electrotechnics – safety sign examples

  8. What are safety signsorHelp those afflicted by injuries http://ucjtk.ff.cuni.cz/publikace/12-04/tabulky.htm

  9. Symbology and signs in electrotechnics – graphical symbols on electrical devices

  10. Symbology and signs in electrotechnics – labeling conductors with letters

  11. Alternating current nominal voltage according to the ČSN

  12. Maximum allowedelectric current values a steady electric current between parts that are touch accessible, flowing through 2000Ω of resistance, must never surpass 3,5mA A.C. or 10mA D.C.

  13. Basic rules for working in ÚBMI ČVUT laboratories • max. 10 students per oneassistant, • the assistant must check the switching device before starting classwork, • the assistant must supervise the correct use of protective instruments, • safety signs and notices are used in the laboratory, • each student has gained professional competence (§4).

  14. Protecting electrical circuits from short-circuiting and overloading • safety fuse x circuit breaker, • use only appropriate and original fuses and circuit breakers, • do not repair fuses and circuit breakers, • perform the replacement only with unloaded parts.

  15. Electrical and electrotechnical device safety – protection classes

  16. Electrical and electrotechnical device safety– extension cords (policy) • two core flexible cords with a plug without an earthing contact cannot be used for connecting class I. devices, • extension cords used for extending power distribution from outlets must always be triple cored, • flexible cords without a protective conductor with a plug without an earthing contact for class II. appliances must have their plug inseparably connected,

  17. Regular check-ups and reviews of electrical appliances and hand-held electric tools • hand-held electric tools, • appliances divided into categories, • dates set according to usage, protection class and category (for appliances), • the protective conductor connection is checked, • the insulation resistance is measured, • the line supply cables are also checked and measured, • standards and recommendations exist.

  18. Important regulations • ČSN EN 60601-1Medical electric instruments Part 1:General safety requirements, • ČSN 33 0000 – 4 – 41Electrotechnic regulations. Electric devices. Part 4: Safety. Chapter 41: Protection from electrical current accidents,

  19. First aidduring electrical current accidents • FREEthe afflicted personfrom the electric circuitin a safe and suitable manner, • find outif the afflicted person is conscious, breathing, has a tangible pulse, treat any wounds, • if the afflicted personisn’t breathing, then apply mouth to mouth artificial respiration, • if the pulse isn’t tangible, then apply indirect heart massage (BE CAREFULabout internal injuries), • possible combination of both –call a doctor, butcontinue with resuscitation until the doctor arrives.

  20. First aid during electrical current accidents – clearing airways (and respiration check)

  21. First aid during electrical current accidents – mouth to mouth artificial respiration (bending the head backwards)

  22. First aid during electrical current accidents – mouth to mouth artificial respiration (performing)

  23. First aid during electrical current accidents – stable position

  24. First aid during electrical current accidents – indirect heart massage (preparation and principle)

  25. First aid during electrical current accidents – indirect heart massage (performing)

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