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Nfpa 70 E

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Nfpa 70 E

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

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