Electrical Safety Training Presentation

Electrical Safety Training

1. 84 HOURS SAFETY & HEALTH TRAINING MODULE PATNA METRO RAIL PROJECT SITE PNM ENVIRO-SAFE SOLUTIONS PVT. LIMITED ELECTRICAL SAFETY

2. ELECTRICAL SAFETY AT HOME & AT CONSTRUCTION SITE

3. ELECTRICAL SAFETY MAKE ELECTRICITY WORK FOR YOU NOT AGAINS YOU REMEMBER EVEN HOUSE CURRENT CAN KILL YOU TREAT ALL ELECTRICITY WITH RESPECT ELECTRICITY IS GOOD SERVENT BUT BAD MASTER

4. ELECTRICAL SAFETY ELECTRIC SHOCK Electric shock is a term that relates to the consequences of current flow through nerves,muscles and organs of a body. Owing to heating effect of current, the body tissues could also be damaged by burns. A particulars danger with A.C. is that is often cause the person concerned to maintain an involuntary grip on the live metal or conductors and this prolongs the current flow.

5. ELECTRICAL SAFETY ELECTRIC SHOCK Death could occur when the rhythm of the heart is disturbed such as to effect blood flow. This is known as ventricular fibrillation. Blood will not reach to Brain and person will die. Unless skilled attention is given immediately, by say artificial respiration ( oral resuscitation ) ventricular fibrillation can be irreversible.

6. ELECTRICAL SAFETY ELECTRIC SHOCK

7. ELECTRICAL SAFETY ELECTRIC SHOCK

8. ELECTRICAL SAFETY ELECTRIC SHOCK Various effects of 50Hz alternating current passing through human body for one second are listed below.

9. ELECTRICAL SAFETY ELECTRIC SHOCK Current CMA Effect Up to 1 No sensation 1 to 8 Sensation not painful 9 to 15 Painful,shock,muscular Control not lost 16 to 20 Muscular control lost,sticking 21 to 50 Severe muscular contraction

10. ELECTRICAL SAFETY ELECTRIC SHOCK Current CMA Effect 51 to 200 Ventricular fibrillation and possible death 201 to above Severe ventricular fibrillation death

11. ELECTRICAL SAFETY Reasons for Accident 1. Earthling not proper 2. Safety lock out procedure not followed 3. Non conventional tagging. 4. Improper tools/ Instruments 5. Short cut, Taking a chance- risk 6. Checking not done for isolation 7. Lack of knowledge or poor knowledge 8. Not using safety appliances ( P.P.E.)

12. ELECTRICAL SAFETY 9. Lack of concentration 10. Lack of preventive maintenance 11. Absence of earthling 12. Testing of portable equipment not done before use 13. Temporary repairs 14. Absence of protection 15. Hurry makes worry

13. ELECTRICAL SAFETY 16. Over confidence 17. Miscommunication 18. Poor quality of tools 19. Insufficient work place 20. Untrained people 21. Monkey tricks

14. ELECTRICAL SAFETY 1) Electrical fatal accident are 10-15 % of total fatal accident i.e. percentage is very high. 2) Main electrical Hazards a) Electrical shock b) Electrical Burn c) Fire & Explosion d) Hazards due to electric welding & cutting

15. ELECTRICAL SAFETY Main protection are 1) Proper fuses 2) Switch gears 3) Circuit Breakers 4) Earthlings

16. ELECTRICAL SAFETY Severity of shock & injury depends on 1) Magnitude of current flowing through the body 2) Whether current A.C. or D.C. 3) Whether current passes through nervous centers or vital organ 4) If current A.C. whether frequency low or high

17. ELECTRICAL SAFETY 5) Duration of current 6) Condition of body Dry skin offers 100000 to 600000 ohms resistance to current, when as wet skin offers only 1000 ohms resistance. ( Average body resistance of children & women is only 60 to 66% of that of men)

18. ELECTRICAL SAFETY Thus, when body is wet there is very great danger of electrical accident and even fatality. When skin is dry and a man is working with portable tool ( 220 V system) maximum current which can pass through is.

19. ELECTRICAL SAFETY I = V / R = 220/ 100000 * 1000 M A = 2.2 M A But when skin is wet I = V / R = 220/ 1000 * 1000 M A = 220 M A

20. ELECTRICAL SAFETY Shock may happen due to 1) Contact with bare live conductors 2) Removal of insulation of conductors 3) Short circuit due to sudden failure & short circuit current not going to earth 4) static charge on equipment discharges through human body.

21. ELECTRICAL SAFETY General safety measure to avoid electric shock Proper earthling required, record of ground resistance required. Due to minimum earthing resistance, leakage current passes through it & not through a person. 2) Use approved insulated tools 3) Use shock proof gloves, boots, tester etc. 4) During electric work, metal ring or chain should not be used

22. ELECTRICAL SAFETY 5) Avoid temporary wiring 6) Employ trained electrician 7) Use good insulated tested wiring 8) Isolation of machine or equip before electric work 9) Follow work permit system

23. ELECTRICAL SAFETY 10) Overloading should not be done 11) Oil type transformer to be placed out door 12) Use automatic voltage regulators, circuit breaker rated fuse & over voltage relays for protection from over voltage 13) Inspection by electrical inspectors also required 14) Material should be as per IS

24. ELECTRICAL SAFETY 15) Closure of live parts 16) Safe laying of cables 17) Lighting arrester 18) Put caution board 19) No work should be started near electrical equipment 20) No aerial line to be installed without approval

25. ELECTRICAL SAFETY 21) Defective supply line to be rectified 22) Guards on transmission lines to be provided to prevent faults due to birds. 23) Use of grounding mat of low ohmic value 24) Temperature sensitive alarms & protective relays to make alert and disconnect equip before overheating

26. ELECTRICAL SAFETY 25) Interlocks to be provided to put in to and out of service equip correctly. Do not meddle with interlocks 26) Keep ready CO2 type and other fire extinguishers 27) Double communication system required with critical area 28) Flame & smoke detection & central fire annunciation . All these systems to be checked periodically & records to be maintained

27. ELECTRICAL SAFETY 29) Diesel pump should be set for required water pressure 30) Good house keeping required including well maintenance 31) Adequate working space and means of access around each apparatus 32) Keep first aid boxes and respiratory equipment ready

28. ELECTRICAL SAFETY 33) Prevent higher humidity & temp near electrical insulation 34) Work with full protection in raining 35) Use of flame proof / explosion proof equips required in flammable / explosive areas

29. ELECTRICAL SAFETY 36) At home also ensure that all equip like electric iron, heater, cooking range, grinder, refrigeration & water pump etc are properly earthed. Use always 3 core IS wire for such appliances. 3 plug pin should be used 37) Ensure that switches & the plugs are fixed at a reasonable height so that the children do not meddle with them

30. ELECTRICAL SAFETY 38) Replace cracked or defective plug & switches immediately. Do not use them by wrapping cloth or making any other make shift arrangement 39) Avoid using metallic lamp holder as far as possible 40) Replace the lamp only after switching off the supply of the lamp holder

31. ELECTRICAL SAFETY 41) Avoid connecting additional appliances to the existing house installations without consulting electrician 42) Always handles switch and plug points with dry hands 43) Switch off the plug points if the socket becomes hot. Hot plug points are indications of loose or bad contact or excessive current going through the plug.

32. ELECTRICAL SAFETY 44) In the case of house fires, switch off the current from the main switch. 45) Look for the appliances like tea kettles, water boilers, icons & ovens etc having automatic cut off system or thermostatic control

33. ELECTRICAL SAFETY 46) If any body comes in accidental contact with live wire & he remains in contact with it, run & switch off the current immediately , if this can not be done. Use dry rope or long wooden stick to separate him from contact. If there is no sign of breathing, start rendering artificial respiration till the victim regains consciousness.

34. ELECTRICAL SAFETY 46) Remember that electricity remains as man’s most efficient & versatile servant so long you honor all the safety principles & follow them otherwise it will strike so, respect electricity with due safety & take full service from if for your comfortable living.

35. ELECTRICAL SAFETY 47) Never use water pipes for earthling the portable electrical appliances 48) Never take risk by using cracked or defective plugs & switches as they are extremely dangerous 49) Never put clothes on the aerial of your antenna or telephone wires

36. ELECTRICAL SAFETY 50) Never undertake any repairs of any electrical wiring yourself, call electrician for such repairs 51) Never use heavy current consuming appliances on lighting plug points 52) Do not pull the connecting flexible wire of plug to remove it from socked take hold of plug itself for withdrawing it from its socket

37. ELECTRICAL SAFETY 53) Do not allow flexible wires connecting table fans, table lamps, etc to the plug 54) Do not pour or fill in kettle or pan when it remains on heater. Keep heater’s switch off to prevent shock 55) Portable tool operation should be checked near the isolating point, before using at the required location

38. ELECTRICAL SAFETY 56) Cable ( cord) should be sufficiently long to reach work place without tension 57) Plug rating should match the tool rating 58) Any switch should be operated fast ( on / off ) to prevent spark. Spark may damage the eye

39. ELECTRICAL SAFETY 59) While shifting portable m/c, its wire should not be bend to protect wire insulation 60) Relieve capacitors of charges before working on them 61) An unsafe man is a liability. He is a danger to himself, his fellow workers, the equipment, the public and the organization as a whole

40. ELECTRICAL SAFETY 62) All motors unless they are of flame- proof type should be outside the building, room or compartment and the ventilation duct. 63) All fuses should be outside the building or compartment 64) Always treat circuit as live until you have proved them to be dead, the insulation of the conductor may be defective

41. ELECTRICAL SAFETY 65) Before working on a motor on or other rotating machine make sure that it can not be set in a motion without your permission 66) Cultivate the habit of turning your face away whenever an arc or flash may occur 67) Do not renew a blown fuse until you are satisfied to the cause and have rectified any irregularity

42. ELECTRICAL SAFETY 68) Do not connect single pole switch or fuse in a neutral circuit but always connect in the live or phase wire 69) Do not temper with the meter boards and cut outs unless you are authorized to do so 70) Do not place any part of your body in circuit either to ground or across the terminal when making a connection or operating

43. ELECTRICAL SAFETY 71) Always report immediately to the person in charge any dangerous condition or dangerous practice which you may observe 72) Do not allow visitors and unauthorized persons to touch or handle electrical apparatus or come within the danger zone of high voltage apparatus

44. ELECTRICAL SAFETY 73) Before opening or repairing any electrical equipment follow instruction manual supplied by manufacturer 74) Before purchasing any electrical items check the quality, not price. Life of your family member is precious. 75) Follow HSE &F procedure before any Electrical job. 76) Follow Safe work permit system HSE-S 201 77) Follow Electrical Safety Proce. HSE-S220

45. https:// youtu.be/zRHtJLFJf78

46. THANK YOU & HAVE SAFE WORKING DAY