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Electrical Safety in the Workplace: Key Measures & Protective Measures

Subpart K on Electrical Safety outlines the hazards, risks and protective measures associated with working with electricity. From understanding Ohm's Law to protective measures like grounding and using insulated tools, this subpart emphasizes the importance of safety protocols to prevent electrical hazards. Learn about equipment grounding, circuit protection, and safety requirements for working with special equipment like batteries. Prioritize safety by implementing the recommended practices to safeguard against electrical shocks, fires, and fatalities.

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Electrical Safety in the Workplace: Key Measures & Protective Measures

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  1. Subpart K Electrical • Long recognized as a serious hazard. • Exposes workers to; • electrical shock. • electrocution. • fires/explosions. • fatalities and serious injuries. • NEC TO OSHA Standard.

  2. OHM’S LAW I= E/R E= Voltage I= Current R= Resistance (volts) (amperes) (OHMS)

  3. Fatalities have occurred at 50 volts or less! I= E/R .05 amps 50V (50 mA) = 1,000 OHM .11 amps 110V (110 mA) = 1,000 OHM

  4. Effects of Current 8-15 mA= Pain. 15-20 mA = Pain & muscle contraction. 30-100 mA= Severe pain and paralysis of breathing muscles. 100-1,000 mA= Ventricular fibrillation. (may cause death) > 1,000 mA = Heart normally stops.

  5. Human Resistance Body AreaResistance (OHMS) Dry Skin 100,000 to 600,000 Wet Skin 1,000 Internal Body 400-600 Ear to Ear 100

  6. So How Do We Protect Ourselves? • Effective Grounding. • Electrical Protective Devices. • Insulation and Guarding of Live Parts. • Inspection & Maintenance. • Training.

  7. PROTECTIVE MEASURES • Equipment Grounding. • Fuses and Circuit Breakers. • Ground Fault Circuit Interrupters (GFCI). • Double Insulated Tools. • Wire Insulation.

  8. FLEXIBLE CORDS“Extension Cords” • A must on a construction site. • Must be “industrial grade”. • Must be grounded. • Can have no breaks. • Are for temporary use only.

  9. Subpart K - Four Major Groups • Installation Safety Requirements: • Approval • Examination, Installation & Use of Equipment • Guarding • Overcurrent Protection • Grounding of Equipment Connected by Cord and plug

  10. Groups, continued • Safety Related Work Practices: • Protection of Employees • Passageways and Open Spaces • Lockout and Tagging of Circuits

  11. Groups, continued • Safety Related Maintenance and Environmental Considerations: • Maintenance of Equipment • Environmental Deterioration of Equipment

  12. Groups, continued • Safety Requirements for Special Equipment: • Batteries • Battery Charging

  13. Other Considerations • Temporary Lights- • 405(a)(2)(ii)(E) • 405(a)(2)(ii)(F) • 405(a)(2)(ii)(G) • 405(a)(2)(ii)(J)

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