Electrical safety

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Electrical safety

  1. 1. <ul><li>Electrical Safety </li></ul>www.Career Safe Online.com
  2. 2. Electrical Safety www.Career Safe Online.com Electricity is an important part of our modern world and sometimes it is easy to forget just how dangerous it can be. Given the correct circumstances, electricity can cause serious injuries or even death. 
  3. 3. Electrical Safety www.Career Safe Online.com <ul><li>Electrocution is the cause of 12% of all workplace deaths among young workers. </li></ul><ul><li>Electrocution is the third leading cause of work-related deaths among 16 and 17-year-olds. </li></ul>
  4. 4. <ul><li>The most common types of electrical injuries are: </li></ul>Electrical Injuries www.Career Safe Online.com <ul><li>Electrical shock </li></ul><ul><li>Electrocution (death due to </li></ul><ul><li>electrical shock) </li></ul><ul><li>Burns </li></ul><ul><li>Falls </li></ul>
  5. 5. Electrical Shock www.Career Safe Online.com Touching a live wire and an electrical ground will cause a shock.
  6. 6. Electrical Shock www.Career Safe Online.com Touching two live wires of different voltages will cause electrical shock.
  7. 7. Electrical Shock www.Career Safe Online.com <ul><li>The severity of the shock depends on: </li></ul><ul><li>Path of the current through your body </li></ul><ul><li>Amount of current flowing </li></ul><ul><li>through your body </li></ul><ul><li>Length of time your body is in contact with the circuit </li></ul>LOW VOLTAGE DOES NOT MEAN LOW HAZARD
  8. 8. Burns www.Career Safe Online.com Burns are the most common injury caused by electricity. The three types of burns are: <ul><li>Electrical burns </li></ul><ul><li>Arc burns </li></ul><ul><li>Thermal contact burns </li></ul>Electrical burns can occur when you come into direct contact with electricity.
  9. 9. Burns www.Career Safe Online.com An arc occurs when there is a gap between conductors and current travels through the air. <ul><li>Electrical burns </li></ul><ul><li>Arc burns </li></ul><ul><li>Thermal contact burns </li></ul>
  10. 10. Burns www.Career Safe Online.com <ul><li>Thermal contact burns can occur when electricity ignites combustible material. </li></ul><ul><li>Electrical burns </li></ul><ul><li>Arc burns </li></ul><ul><li>Thermal contact burns </li></ul>
  11. 11. Falls www.Career Safe Online.com Another common type of electrical injury is falling. Workers who experience a shock on elevated work surfaces such as platforms, ladders or scaffolds can fall resulting in serious injury or death.
  12. 12. <ul><li>To avoid injuries, you should be aware of electrical hazards. Some of the most common electrical hazards are: </li></ul>Electrical Hazards www.Career Safe Online.com <ul><li>Exposed electrical parts </li></ul><ul><li>Overloaded circuits </li></ul><ul><li>Defective insulation </li></ul><ul><li>Improper grounding </li></ul><ul><li>Damaged power tools </li></ul><ul><li>Overhead power lines </li></ul><ul><li>Wet conditions </li></ul>Let’s take a closer look at each of these hazards.
  13. 13. Exposed Electrical Parts www.Career Safe Online.com <ul><li>Exposed electrical parts can include: </li></ul><ul><li>Breaker boxes without a cover </li></ul><ul><li>Electrical terminals in motors, appliances, and electronic equipment </li></ul>
  14. 14. Overloaded Circuits www.Career Safe Online.com <ul><li>Overloading a circuit increases the potential for </li></ul><ul><li>fires to occur. Overload hazards exist if: </li></ul><ul><li>Too many devices are plugged into a circuit </li></ul><ul><li>The wire insulation melts </li></ul><ul><li>An improper overcurrent protection device is used </li></ul><ul><li>No overcurrent protection device is used </li></ul>
  15. 15. Overloaded Circuits www.Career Safe Online.com <ul><li>Overcurrent protection devices include: </li></ul><ul><li>Circuit breakers </li></ul><ul><li>Fuses </li></ul><ul><li>Ground fault circuit interrupters (GFCI) </li></ul>A circuit breaker automatically “trips” and shuts off the current in a circuit if it becomes overloaded.
  16. 16. Overloaded Circuits www.Career Safe Online.com <ul><li>A fuse contains an internal part that melts and shuts off the current if there is an overload. </li></ul><ul><li>Circuit breakers </li></ul><ul><li>Fuses </li></ul><ul><li>Ground fault circuit interrupters </li></ul>
  17. 17. Overloaded Circuits www.Career Safe Online.com <ul><li>A ground fault circuit interrupter (GFCI) detects current leaking from a circuit to ground and shuts the current off. </li></ul><ul><li>Circuit breakers </li></ul><ul><li>Fuses </li></ul><ul><li>Ground fault circuit interrupters </li></ul>Receptacle type
  18. 18. Defective Insulation www.Career Safe Online.com To protect you, electrical wires are insulated by a plastic or rubber covering. Insulation prevents conductors from coming in contact with each other and with people. Make sure the insulation of tools and cords you are using is not damaged.
  19. 19. Grounding www.Career Safe Online.com When an electrical system is properly grounded, there is a path that allows the current to travel to the earth (the ground). When any electrical system is not properly grounded, a hazard exists.
  20. 20. Power Tools www.Career Safe Online.com Power tools that are damaged or not properly maintained can cause you to be seriously injured. If you touch a metallic part of a power tool that is energized because of damaged insulation or improper grounding, you could be shocked.
  21. 21. Power Tools www.Career Safe Online.com <ul><li>To protect you from shock, </li></ul><ul><li>burns and electrocution, tools </li></ul><ul><li>must: </li></ul><ul><li>Have a three-wire cord with </li></ul><ul><li>ground and be plugged into a grounded receptacle. </li></ul><ul><li>Be double insulated. </li></ul><ul><li>Be powered by a low-voltage </li></ul><ul><li>isolation transformer. </li></ul>
  22. 22. Overhead Power Lines www.Career Safe Online.com Overhead power lines are not usually insulated, and cause more than half of all electrocutions.
  23. 23. Wet Conditions www.Career Safe Online.com <ul><li>Wet conditions are hazardous because you can become an easy path for electrical current. </li></ul><ul><li>There are many circumstances that create wet conditions: </li></ul><ul><li>Standing in water </li></ul><ul><li>Wet clothing </li></ul><ul><li>High humidity </li></ul><ul><li>Perspiration </li></ul>
  24. 24. <ul><li>You can StartSafe and StaySafe by using </li></ul><ul><li>the following safe work practices: </li></ul>www.Career Safe Online.com Safe Work Practices <ul><li>Inspect cords before each use </li></ul><ul><li>Never overload a circuit </li></ul><ul><li>Stay away from all </li></ul><ul><li>unguarded conductors </li></ul><ul><li>To unplug, pull on the plug, not the cord </li></ul><ul><li>Don’t wear jewelry or use other metal objects around electrical equipment </li></ul>
  25. 25. www.Career Safe Online.com Training concerning electricity is very important. Training for employees working with electrical equipment must include how to: <ul><li>De-energize the equipment </li></ul><ul><li>Use lockout and tag procedures </li></ul><ul><li>Use insulating protective equipment </li></ul><ul><li>Maintain a safe distance from energized parts </li></ul><ul><li>Use appropriate PPE </li></ul>Safe Work Practices: Training
  26. 26. <ul><li>When performing lockout/tagout on circuits, trained employees will do the following: </li></ul>www.Career Safe Online.com Safe Work Practices: Lockout/Tagout <ul><li>Turn off the power supply </li></ul><ul><li>Put a lock on all power sources </li></ul><ul><li>to the circuit </li></ul><ul><li>Apply a tag </li></ul><ul><li>Test the circuit </li></ul>
  27. 27. Summary www.Career Safe Online.com It is very important to StartSafe and StaySafe around electricity. In order to do so: <ul><li>Know the hazards </li></ul><ul><li>Plan your work and plan for safety </li></ul><ul><li>Avoid wet working conditions and other dangers </li></ul><ul><li>Avoid overhead power lines </li></ul><ul><li>Use proper wiring and connectors </li></ul><ul><li>Use and maintain tools properly </li></ul><ul><li>Wear the correct PPE for the job </li></ul>

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