Certified Safety Construction Worker CW202

1. Certified Safety Construction Worker CW202 Presented By: Construction Compliance Training Center This material was developed by Compacion Foundation Inc and The Hispanic Contractors Association de Tejas under Susan Harwood Grant Number SH-20-843-SH0 Occupational Safety and Health Administration, U.S. Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsements by the U.S. Government.

2. The following presentations have been developed in both Spanish and English for the construction industry. These presentations focus on the Big Four Construction Hazards – falls, electrocution, caught-in and struck-by. All training materials will cover the four hazards seen regularly on construction sites and will focus on the methods for the recognition and the prevention of these common hazards. CW202 The Big Four Construction Hazards: Electrical

3. Electrical Hazards – What is Electricity? • Improper Grounding • Exposed Electrical Parts • Inadequate Wiring • Damaged Insulation • Overloaded Circuits • Damaged Tools & Equipment • Wet Conditions • Overhead Power Lines • Accident Prevention: • Personal Protective Equipment • Inspect Tools & Cords • GFCIs • Lock-Out/Tag-Out CW202 The Big Four Construction Hazards: Electrical

4. Electrical Hazards • Electrocutions are one of the greatest hazards on construction sites. • This program will help you recognize common fall hazards. • The symbols will tell you if the situation in the picture is either safe or not safe. Safe Not safe CW202 The Big Four Construction Hazards: Electrical

5. Each year workers die from contacting electric current. During the year 2009: • Approximately 212 workers died after contacting electric current • Approximately 77 were construction workers • Approximately 5% of all occupational deaths result from electrocutions CW202 The Big Four Construction Hazards: Electrical

6. Electricity is a natural energy force. • Electricity is also a man made energy force. • It is essential to modern life and taken for granted everyday. CW202 The Big Four Construction Hazards: Electrical

7. Electricity flows through conductors. • Conductors include metals, water, the Earth and the human body. • Electricity must have a complete circuit or path to flow. CW202 The Big Four Construction Hazards: Electrical

8. How Electricity Works • When electrical tools are working properly a complete circuit is maintained between the tool and the energy source. CW202 The Big Four Construction Hazards: Electrical

9. How Electricity Works • However, if the tool is damaged the person may come in contact with the electricity and can become a path for the current. • The person will be shocked! CW202 The Big Four Construction Hazards: Electrical

10. Electrical Hazards The following is a list of a common electrical hazards found on construction sites: CW202 The Big Four Construction Hazards: Electrical Improper grounding Exposed electrical parts Inadequate wiring Overhead power lines Damaged insulation Overloaded circuits Wet conditions Damaged tools and equipment

11. Improper Grounding • Grounding is the process used to eliminate unwanted voltage. • A ground is a physical electrical connection to the earth. CW202 The Big Four Construction Hazards: Electrical

12. Improper Grounding • Electrical equipment must be properly grounded. • Grounding reduces the risk of being shocked or electrocuted. CW202 The Big Four Construction Hazards: Electrical

13. Improper Grounding • The ground pin safely returns leakage current to ground. • Never remove the ground pin. CW202 The Big Four Construction Hazards: Electrical

14. Improper Grounding • Removing the ground pin removes an important safety feature. • You can get shocked! CW202 The Big Four Construction Hazards: Electrical

15. Exposed Electrical Parts • Exposed wires or terminals are hazardous. • Report these conditions to your supervisor. CW202 The Big Four Construction Hazards: Electrical

16. Exposed Electrical Parts • This electrical panel has missing circuit breakers. • Never use a panel that has exposed wires. CW202 The Big Four Construction Hazards: Electrical

17. Exposed Electrical Parts • All openings must be closed. CW202 The Big Four Construction Hazards: Electrical

18. Exposed Electrical Parts • Outer insulation on electrical cords must be intact. CW202 The Big Four Construction Hazards: Electrical

19. Exposed Electrical Parts • On construction sites, temporary lighting must be properly guarded and protected to avoid contact with broken bulbs and avoid potential shocks. CW202 The Big Four Construction Hazards: Electrical

20. Use properly rated extension cords. • Make sure your power tools are being used with a properly rated xtension cord. CW202 The Big Four Construction Hazards: Electrical

21. Inadequate Wiring DIFFERENT TYPES OF WIRES WITH THEIR ELECTRICAL CURRENT RATING CW202 The Big Four Construction Hazards: Electrical

22. Damaged Insulation • Defective or inadequate insulation is a hazard. • Insulation prevents conductors from contacting each other or you. CW202 The Big Four Construction Hazards: Electrical

23. Damaged Insulation • Never attempt to repair a damaged cord with tape. CW202 The Big Four Construction Hazards: Electrical

24. Damaged Insulation • Never use tools or extension cords with damaged insulation. CW202 The Big Four Construction Hazards: Electrical

25. Damaged Insulation • Never hang extension cords from nails or sharp objects. CW202 The Big Four Construction Hazards: Electrical

26. Damaged Insulation • Do not run extension cords through doors or windows. CW202 The Big Four Construction Hazards: Electrical

27. Overloaded Circuits • Overloaded circuits can cause fires. • Use proper circuit breakers. CW202 The Big Four Construction Hazards: Electrical

28. Overloaded Circuits • Never overload an outlet. CW202 The Big Four Construction Hazards: Electrical

29. Overloaded Circuits • Do not use power strips or surge protectors on construction sites. • Use a 3-way extension with a GFCI instead. CW202 The Big Four Construction Hazards: Electrical

30. Damaged Tools and Equipment • Do not use electric tools that are damaged. • You may receive a shock or be electrocuted. CW202 The Big Four Construction Hazards: Electrical

31. Damaged Tools and Equipment • Double insulated tools are labeled. • It will be marked “Double Insulated”. • It will have the following symbol: CW202 The Big Four Construction Hazards: Electrical

32. Wet conditions are hazardous. • Damaged insulation increases the hazard. CW202 The Big Four Construction Hazards: Electrical

33. Always avoid using tools in wet locations. • Water increases the risk of electric shock. CW202 The Big Four Construction Hazards: Electrical

34. Overhead Power Lines • Survey the site for overhead power lines. • Never store materials or equipment under overhead power lines. CW202 The Big Four Construction Hazards: Electrical

35. Overhead Power Lines • Maintain a distance of at least 10’ between tools and equipment and overhead power lines. • Shocks and electrocutions occur where physical barriers are not in place to prevent contact with the wires. CW202 The Big Four Construction Hazards: Electrical

36. Overhead Power Lines • Maintain safe distances between scaffolding and overhead power lines. CW202 The Big Four Construction Hazards: Electrical

37. Overhead Power Lines • Overhead power lines are very dangerous. • Never attempt to contact an overhead power line. CW202 The Big Four Construction Hazards: Electrical

38. You will be presented with a specific hazard recognition question to test your understanding of this material. CW202 The Big Four Construction Hazards: Electrical

39. The process of grounding is: Falling to the ground Standing in one place Making a physical connection to Earth None of the above CW202 The Big Four Construction Hazards: Electrical

40. The process of grounding is: The correct answer is: C – Making a physical connection to Earth Question 1 CW202 The Big Four Construction Hazards: Electrical

41. You should remove the ground pin from electrical cords because it is not necessary. True False Question 2 CW202 The Big Four Construction Hazards: Electrical

42. You should remove the ground pin from electrical cords because it is not necessary. The correct answer is: B – False CW202 The Big Four Construction Hazards: Electrical

43. It is acceptable to have missing breakers from an electrical panel box. True False Question 3 CW202 The Big Four Construction Hazards: Electrical

44. It is acceptable to have missing breakers from an electrical panel box. The correct answer is: B – False Question 3 CW202 The Big Four Construction Hazards: Electrical

45. When working under overhead power lines, the minimum safe distance between equipment and the overhead lines is: 8 feet 20 feet 10 feet 12 feet Question 4 CW202 The Big Four Construction Hazards: Electrical

46. When working under overhead power lines, the minimum safe distance between equipment and the overhead lines is: The correct answer is: C – 10 feet Question 4 CW202 The Big Four Construction Hazards: Electrical

47. When the insulation on a cord is damaged, you should: Use duct tape to repair it Do nothing Remove it from service immediately Touch the conductors to see it they are energized Question 5 CW202 The Big Four Construction Hazards: Electrical

48. When the insulation on a cord is damaged, you should: The correct answer is: C – Remove it from service immediately Question 5 CW202 The Big Four Construction Hazards: Electrical

49. Accident Prevention • A willing, positive attitude towards safety will help make a safer work environment. CW202 The Big Four Construction Hazards: Electrical

50. Accident Prevention • Always consider these safety precautions: • Personal protective equipment (PPE), • Inspect tools, • Ground fault circuit interrupters (GFCIs), • Lock-out/tag-out. CW202 The Big Four Construction Hazards: Electrical