Module 4: Methods of Control

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1. Slide 1

   Module

   • 4
   • Methods of
   • Control
2. Slide 2

   Recogni ze

   • Evaluate
   • Control
3. Slide 3

   Module Objectives

   • Identify the three types of control that should be used to achieve electrical safety. Identify the engineering, administrative and PPE controls you use on your job.
   • Identify facts and procedures relating to lockout/tagout.
4. Slide 4

   Module Objectives

   • List the steps required to achieve an electrically safe
   • condition.
   • Recognize
   • when a work
   • permit is required to work on energized electrical circuits.
   • Recognize the appropriate warning signs to alert employees to the danger of electricity.
5. Slide 5

   Module Objectives

   • Recognize the appropriate
   • PPE to use based on the calculated energy value of an energy
   • source.
   • Given
   • a case
   • study, determine the most appropriate method of control and necessary corrective action.
6. Slide 6

   What is a Control?

   • A control is a measure or an action that is taken to eliminate current hazards and to prevent future hazards.
7. Slide 7

   Three Types of Control

   • Eng
   • PP E
   • Administrative
8. Slide 8

   Engineering Controls

   • Controls that are engineered into the job. The focus is on eliminating the hazard altogether.
9. Slide 9
   • Engineering Control
   • Redesign Examples
   • of equipment
   • Substitution of material, equipment or process
   • Change process to eliminate exposure
   • Use of barriers to isolate the hazard
   • Use of barriers or shields to isolate the worker
10. Slide 10

    Safe Wiring

    • Choose the correct size of wire for the amount of current in the circuit.
    • Make certain that the wire’s insulation is appropriate for the voltage.
    • Make sure the wire is tough enough for the conditions. Make sure the connection is reliable.
11. Slide 11

    Wire Sizes

12. Slide 12

    Administrative Controls

    • Controls that reduce employee exposures through administrative methods. Depend on constant implementation or intervention.
13. Slide 13

    Administrative Control

    • Examples
    • Education
    • and training
    • Procedures to limit exposure
    • Maintenance
    • Good housekeeping
    • Signs and warnings
    • Distance
14. Slide 14

    Personal Protective

    • Equipment (PPE)
    • Controls that are worn by employees to protect them from the environment.
15. Slide 15

    PPE Examples

    • Protective
    • Clothing
    • Protective
    • Gear
    • Photo courtesy of Schneider Electric
16. Slide 16

    Uncontrolled Arc Blast

17. Slide 17

    Arc Blast Controls

    • Engineering Administrati ve
    • PPE
    • Photo courtesy of Schneider Electric
18. Slide 18

    Arc Blast With Circuit Breaker

19. Slide 19

    Comparison of Blasts

    • Both Blasts: 480 Volts, 30,000 Amps
    • Uncontrolled
    • Blast opened
    • Circuit
    • Circuit Breaker
    • Blast
    • Circuit
    • opened
    • in 330
    • in 8
    • milliseconds
    • Incident
    • Incident
    • energy = 30
    • energy = .30
    • Circuit
    • = energy
    • reduction
    • calories breaker
    • per
    • calories
    • per
    • factor of 100!
    • cm 2
    • cm 2
20. Slide 20

    What is Lockout/Tagout?

    • Photo courtesy of Schneider Electric
21. Slide 21

    Lockout

    • The placement of a lockout device on an energy isolating device, in accordance with an established procedure, ensuring that the energy isolating device and the equipment being controlled cannot be operated until the lockout device is
22. Slide 22

    Tagout

    • The placement of a tagout device on an energy isolating device, in accordance with an established procedure, to indicate that the energy isolating device and the equipment being controlled may not be operated until the tagout device is removed.
    • DA NG
23. Slide 23

    1910.147 Versus 1910.333

    • When
    • Who
    • Verifi-cation
    • 1910.14
    • Equipment that
    • might unexpectedly
    • Authorized energize
    • person
    • Verifies isolation and de-energization
    • 1910.33
    • Energized
    • circuits
    • Qualified person
    • Tests for energized condition due to inadvertant voltage or voltage backfeed
24. Slide 24

    Achieving an Electrically Safe

    • Condition
25. Slide 25

    Warnings and Signs

    • Illustrates minimum requirement.
    • This is an example, not a recommendation.
    • Slide courtesy of Schneider Electric
26. Slide 26

    Warnings and Signs

    • Slide courtesy of Schneider Electric
27. Slide 27

    The Importance of PPE

28. Slide 28

    FR pants l

    • Selecting PPE
    • Incident
    • Output Energy 2
    • Category (Cal/cm ) PPE
    • N/A
    • Cotton underwear
    • plus FR shirt &
    • Cotton underwear plus FR shirt &
    • FR pants plus FR coverall
    • S Cotton
    • underwear plus FR shirt &
    • FR pants plus double layer
    • Untreated cotton
    • FR shirt and FR pants
    • switching coat and pants
29. Slide 29

    PPE—Hand and Arm

    • Protection
    • Photo courtesy of Schneider Electric
30. Slide 30

    PPE—Face, Hands, Arms, Torso

    • Photo courtesy of Schneider Electric
31. Slide 31

    PPE—Face, Hands, Arms, Torso

    • Photo courtesy of Schneider Electric
32. Slide 32

    Control Summary

33. Slide 33

    Electrical Controls—Case 1

34. Slide 34

    Electrical Controls—Case 2

    • Photo Source: NIOSH Safety and Health for Electrical Trades
35. Slide 35

    Electrical Controls—Case 3

    • Photo Source: NIOSH FACE Case 03NE022
36. Slide 36

    Electrical Controls—Case 4

    • Photo Source: NIOSH FACE Case 03NE022
37. Slide 37

    Planning for Your Small

    • Action
    • Potential
    • Overcoming the
    • Business
    • Barriers
    • Barriers