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Nfpa 70 E

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Focused on Chapter 1

Focused on Chapter 1


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  • 1. NFPA 70E Standard for Electrical Safety in the workplace
  • 2. Agenda
    • Introduction
    • Statistics
    • Chapter 1 NFPA 70E standards
    • Using Electrical PPE and equipment demonstration
    • Onsite application discussion
  • 3. Why Now?
    • Average of 4,000 non-disabling and 3,600 disabling electrical contact injuries annually in the United States.
    • One person is electrocuted in the workplace every day.
    • Electrocutions were the fourth leading cause of traumatic occupational fatalities.
    • Labor Statistics give OSHA reason for focused citations 14 in Alabama
  • 4.  
  • 5. We Need a Cultural Change
    • In a survey of 1,200 electricians found:
    • 97% of respondents had experienced a shock at work.
    • Most electricians will not only agree with those statistics but will argue “Electrical work is dangerous”.
    • Apprentices are commonly encouraged to work on live parts without protection.
  • 6. In an Arc Blast/Flash study:
    • Measurements were taken to quantify forces exerted within 2’ of an arc blast/flash
    • 141.5 db
    • Temperature at exposed parts of a manikin- 437 degrees F over double temp for 2 nd degree burn
    • Temperature inside of shirt- 122 degrees F less than 2 nd degree burn
    • 2160 lbs/sq. ft of pressure was measured.
  • 7. NFPA 70E Standards
    • 4 Chapters
      • Chapter 1 Safety-Related Work Practices
      • Chapter 2 Safety-Related Maintenance Requirements
      • Chapter 3 Safety Requirements for Special Equipment
      • Chapter 4 Installation Safety Requirements
  • 8. Chapter 1 Article 110
    • General Requirements for Electrical Safety-Related Work Practices
      • .1 Scope of chapter 1 covers practices for employees who work on or near live parts
      • .3 Responsibility of employer to provide safety-related work practices and train employees who shall implement them.
      • .3 Responsibility of the employees is to implement the practices.
  • 9. Chapter 1 Article 110
      • .4 Multiemployer Relationship, more than one employer may be responsible for hazardous conditions that violate safe work practices.
      • .4 Employers shall inform each other of existing hazards, PPE requirements, safe work practice procedures, and emergency procedures.
      • .4 This coordination shall include a meeting and documentation.
  • 10. Chapter 1 Article 110
    • .6 Training Requirements
      • Classroom, on-the-job, or combination
      • All employees who face risk
      • In specific hazards associated with electrical energy
      • Emergency Procedures
        • Victim release
        • First Aid/CPR
  • 11. Chapter 1 Article 110
    • .6 Training Requirements (cont.)
    • Qualified Person
      • Shall be trained and knowledgeable of the construction and operation of equipment or a specific work method.
      • Shall be trained to recognize and avoid the electrical hazards that might be present.
    • Unqualified Person
      • Shall be trained and be familiar with any electrical safety-related practices that would apply to their safety.
  • 12. Chapter 1 Article 110
    • .7 Electrical Safety Program
      • Must direct activity/procedures appropriate for the voltage, energy level, and circuit conditions.
      • Provide awareness of potential electrical hazards.
      • Provide self-discipline for employees who might perform work on or near energized parts.
      • Identify Principles upon which it is based.
      • Identify controls by which it is measured and monitored.
      • Provide a hazard/risk evaluation prior to work on or near live parts.
      • Annex E (example 106)
  • 13. Chapter 1 Article 120
    • .1 Establishing an Electrically Safe Work Condition
    • Condition considered Unsafe until all 6 steps have been successfully completed
      • Check drawings for energy sources
      • Open disconnecting device(s) for all sources
      • Visual verification
      • Apply LO/TO devices
      • Verify parts as deenergized
      • Ground phase conductors before touching (if necessary)
  • 14. Chapter 1 Article 120
    • .2 Working On or Near Deenergized Electrical Conductors or Circuit Parts That Have Lockout/Tagout Devices Applied
    • LO/TO 7 Principles
      • Employee involvement, Training, Plan development, Control of Energy, Identification of LO/TO devices, Voltage removed, Coordination.
  • 15. Chapter 1 Article 120
      • Must have established procedure including procedure audits
      • 3 forms of control – individual, simple, complex.
      • Coordination, Training, Equipment and Procedures listed 120.2 (D) – (F)
        • Note – (E)(1) Lock Application
        • If equipment isn’t compatible with LO devise what alternative is available?
  • 16. Chapter 1 Article 130
    • Working On or Near Live Parts
      • 5 Major Components
        • .1 Justification for work
        • .2 Establishing Approach Boundaries
        • .7 PPE
        • .3 Hazard Analysis
        • .1(A)&110.7(G)Pre-Planning documentation
  • 17. Chapter 1 Article 130
    • Justification for Work
      • Testing, diagnostics that can only be performed while equip. is energized
      • Infeasibility due to equipment design
      • Increased or additional hazards presented
        • Interruption of life support
        • Deactivation of emergency alarm systems
        • Shutdown of hazardous location ventilation
  • 18. Chapter 1 Article 130
    • Establishing Approach Boundaries
      • Limited Approach Boundary
        • Unqualified persons allowed if advised on possible hazards and continuously escorted by qualified person
        • For Voltages up to 750V
          • Distance of 10 ft. Shock Protection if exposed parts are movable
          • Distance of 3.5 ft. Shock Protection if exposed parts are fixed
          • Distance of 4 ft. Flash Protection@ 600V
  • 19. Chapter 1 Article 130
    • Establishing Approach Boundaries
      • Restricted Approach Boundary
        • Only qualified persons allowed
        • No conductive objects allowed
        • PPE required
        • For Voltages up to 750V
          • Distance of 1 ft. Shock Protection
          • Distance of 4 ft. Flash Protection@ 600V
  • 20. Chapter 1 Article 130
    • Establishing Approach Boundaries
      • Prohibited Approach Boundary
        • No un-insulated part of a qualified persons body may cross this area
        • For Voltages up to 750V
          • Distance of 1 in. Shock Protection
          • Distance of 4 ft. Flash Protection@ 600V
  • 21. Chapter 1 Article 130
    • Approach Boundary Solution
      • Keep it simple, exceed standard
      • Allow for special situations and address them as encountered.
    15 feet 15 feet 25 feet 750V-up 1 foot 4 feet 10 feet 50-750V Prohibited Approach Boundary Restricted Approach Boundary Limited Approach Boundary Voltage
  • 22. Chapter 1 Article 130
    • Protective Clothing and Personal Protective Equipment
      • Must be visually inspected before each use
      • Rubber products must be electrically tested as needed (gloves 6 mo.) and certified as such
  • 23. Chapter 1 Article 130
    • Protective Clothing and Personal Protective Equipment
      • Hazard/Risk Category 0 – 4
      • Table 130.7(C)(10) and (11)
      • Examples
  • 24. Chapter 1 Article 130
    • Hazard Analysis
      • Shock Hazard Analysis
        • Determines voltage and personnel that will be exposed.
        • Provides boundaries based on voltages
        • Determines PPE required
      • Flash Hazard Analysis
        • Determines Flash Protection Boundary
          • 600V or less = 4.0 feet
        • Determines PPE required
  • 25.  
  • 26. Pre-Planning Documentation
    • Job Briefing/Planning Checklist
    • Electrical Work Permit
    • Examples Annex I Annex J
    • Does this documentation cover hazard/flash analysis
    • Covers documentation of justification
  • 27. Chapter 1 Article 130
    • .6 Other Precautions for Personnel Activities
      • (A) Alertness
      • (B) Blind Reaching
      • (C) Can you see? (illumination)
      • (D) ConDuctive articles being worn
      • (E) ConductivE material handled
      • (F) ConFined Space
  • 28. Chapter 1 Article 130
    • .6 Other Precautions for Personnel Activities (cont.)
      • (G) Housekeeping Duties
      • (H) Flammable Materials
      • (I) Anticipating Failure
      • (J) Routine Opening and Closing Circuits
      • (K) Reclosing Circuits After Protective Device Operation
  • 29. Onsite Application
    • Preparations to control access to energized parts begins when prints are made available
      • Temporary power should be placed so that it can remain the only source of power through most of job.
  • 30. Onsite Application
    • Before Permanent Power enters building what can we look for?
      • All empty conduits entering “To Be” energized equipment is capped (duct tape will not stop a good fish tape)
        • Are empty conduits spares, mistakes, or planned near-future use.
      • LO/TO equipment and procedures
  • 31. Onsite Application
      • Is PPE available for Hazard/Risk Categories
        • Who is qualified to use PPE
        • Have unqualified and qualified persons been trained
      • Are sub panels completed before energized
        • To minimize exposure, complete 100% of known circuits within a sub panel before it is energized
  • 32. Onsite Application
      • Are documented safety meetings, permits, briefing/planning checklist being completed
      • Other examples
      • THE MAIN IDEA……….
  • 33. Onsite Application
      • CREATE AN ELECTRICAL SAFE WORKING ENVIRONMENT
      • (SHUT IT OFF!)
  • 34. Onsite Application
      • WHEN NOT POSSIBLE (JUSTIFIED REASON) EVERYONE INVOLVED SHOULD KNOW EVERYTHING ABOUT THE WORK TO BE DONE THROUGH DOCUMENTATION.
  • 35. Information Covered
    • Introduction
    • Statistics
    • Chapter 1 NFPA 70E standards
    • Using Electrical PPE and equipment demonstration
    • Onsite application discussion
  • 36. Questions?
    • Thank you

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