2. Welcome
Welcome to Safety awareness
Electrical Electrical safety awareness
ELECTRICAL SAFETY

3. Power Distribution
ELECTRICAL SAFETY

4. SAFETY TEMINOLOGY
 Shocks-Results in
burn,injury,deaths
 Flashovers- Results in
deaths, fires, damages
 Faults-Results in arching,
explosions and fires
 Explosions in electrical
equipment resulting in
damage to installations and
deaths
 Fire hazards resulting in
destruction , loss of fire and
release of smoke , dust gases
etc.
ELECTRICAL SAFETY

5. Causes of electrical hazard
 Exposed live conductors
 Conductor not discharged
 Enclosure not earthed
 Lack of fence and lock
 Lack of awareness
 Miscommunication
/miss-interpretation
 Capacitor not discharged
 Lack of ‘danger sign’.
ELECTRICAL SAFETY

6. Contd….
 Open cable trench
 Cable not clamped properly
 Poor illumination
 Overloading of electrical
gadgets
 Not using safety belt
 Internal flash over
 Protection did not respond.
 Lightning stroke
ELECTRICAL SAFETY

7. Shock level at 50 Hz
MAGNITUDE OF Effect
CURRENT
Below 10 milli Not painful
amperes
10mA to 15mA Painful shock
15mA to 20 mA Muscle control
affected
20 mA to 40 mA Breathing affected
40mA to 80mA Irregular heart beat
Above 100mA Severe burn, leads
to death
ELECTRICAL SAFETY

8. Safety device
 Discharged rod
 Rubber gloves
 Rubber shoes
 Insulation mat
 Insulation support
 Insulated pliers/screw
driver
 Goggles/apron
ELECTRICAL SAFETY

9. Electrical permit
 Line clearance for LT
 Line clearance for HT
 Height work permit
 Excavation permit
 Temporary connection
permit
 Barricading
ELECTRICAL SAFETY

10. Tagging
 Green tag for
production
 Red tag for electrical
isolation
 Tag “MAN AT WORK”
 Message no for de-
enegization
 Message no for
energization
ELECTRICAL SAFETY

11. Illumination level
Area Lux level Area Lux level
Unit 50 Conference 1000
/CDU/VBU room
Furnace 50 Reading 150
room
Pump 50 Dressing 200
house table
Substation 50 Badminton 500
Control 300 Canteen 150
room
Corridor 70 Road 30
Footpath 30 Walk way 15
Bed room 100 Inspection 200
kitchen 200 Hospital 100
ward
ELECTRICAL SAFETY

12. Earthing system
 Structure earthing
 Tower earthing
 Cabinet earthing
 Equipment earthing
 Transformer body earthing
 Transformer neutral
earthing
 Surge arrester earthing
 Cable rack earthing
 Fencing/door earthing
ELECTRICAL SAFETY

13. HOUSE WIRING
ELECTRICAL SAFETY

14. ELECTRICAL SAFETY

15. FUNCTION OF ELCB
ELECTRICAL SAFETY

16. FUNCTION OF MCB
ELECTRICAL SAFETY

17. Case study
ELECTRICAL SAFETY

18. FIRE EXTIGUISHER
 DCP=dry chemical powder
 CO2= Carbon di-oxide
ELECTRICAL SAFETY

19. Connection by Agency
ELECTRICAL SAFETY

20. DB open left after tempering
ELECTRICAL SAFETY

21. Tempering by students
ELECTRICAL SAFETY

22. Tempering by students
ELECTRICAL SAFETY

23. Tempering by students
ELECTRICAL SAFETY

24. .
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25. Thank you
ELECTRICAL SAFETY