Title: Professional competence in electrotechnics according to Act 501978 Coll.
1Professional 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)
2Workers instructed (4)- without requirements
for professional training or experience
- were familiarized within 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.
3The danger of electrical current accidents
depends mainly on
- the source voltage,
- the current frequency,
- the wave or pulse shape,
- the duration of the currents passing through the
organism, - the current path through the body.
4Symbology and signs in electrotechnics the
meaning of safety colours
5Symbology and signs in electrotechnics the
safety meaning of geometric shapes
6Symbology and signs in electrotechnics safety
notice examples
1) CSN IEC 417
7Symbology and signs in electrotechnics safety
sign examples
8What are safety signs or Help those afflicted
by injuries
http//ucjtk.ff.cuni.cz/publikace/12-04/tabulky.ht
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9Symbology and signs in electrotechnics
graphical symbols on electrical devices
10Symbology and signs in electrotechnics labeling
conductors with letters
11Alternating current nominal voltage according to
the CSN
12Maximum allowed electric current values
- a steady electric current between parts that
are touch accessible, flowing through 2000O of
resistance, must never surpass - 3,5mA A.C. or 10mA D.C.
13Basic rules for working in ÚBMI CVUT laboratories
- max. 10 students per one assistant,
- the assistant must check the switching device
before starting class work, - 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.
15Electrical and electrotechnical device safety
protection classes
16Electrical 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,
17Regular 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.
18Important regulations
- CSN EN 60601-1 Medical electric instruments Part
1 General safety requirements, - CSN 33 0000 4 41 Electrotechnic regulations.
Electric devices. Part 4 Safety. Chapter 41
Protection from electrical current accidents,
19First aid during electrical current accidents
- FREE the afflicted person from the electric
circuit in a safe and suitable manner, - find out if the afflicted person is conscious,
breathing, has a tangible pulse, treat any
wounds, - if the afflicted person isnt breathing, then
apply mouth to mouth artificial respiration, - if the pulse isnt tangible, then apply indirect
heart massage (BE CAREFUL about internal
injuries), - possible combination of both call a doctor, but
continue with resuscitation until the doctor
arrives.
20First aid during electrical current accidents
clearing airways (and respiration check)
21First aid during electrical current accidents
mouth to mouth artificial respiration (bending
the head backwards)
22First aid during electrical current accidents
mouth to mouth artificial respiration (performing)
23First aid during electrical current accidents
stable position
24First aid during electrical current accidents
indirect heart massage (preparation and principle)
25First aid during electrical current accidents
indirect heart massage (performing)