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Understanding Electrical Safety: Essential Knowledge and Practices

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overton
17 diapositives · 312 Views · Aug 26, 2014

This program provides vital information on electrical safety, explaining how electricity operates and the importance of treating it with respect. It covers the risks posed by electrical shock and burns, and how to respond in an emergency, including procedures for electrocution. Key factors contributing to electrical hazards are addressed, including unsafe equipment and practices. The program emphasizes preventive measures such as proper insulation and grounding and highlights the importance of using hand-held tools safely. Ensure a safe work environment by following best practices.

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  1. Electrical Safety Program

  2. How Electricity Works • Operating an electric switch is like turning on a water faucet. Behind the faucet or switch there must be a source of water or electricity with something to transport it, and with a force to make it flow. • In the case of water the source is a pump, and the force to make it flow through the pipes is provided by the pump. • For electricity, the source is the power generator. Current travels through electrical conductors (wires) and the force to make it flow, measured in volts, is provided by a generator.

  3. Electrical Shock • Received when current passes through the body • You become part of the circuit • Severity of a shock depends on: • Path of current through the body • Amount of current flowing through the body • Length of time the body is in the circuit

  4. If Electrocution Occurs • Call for help • DO NOT touch the victim or the conductor • Shut off the current at the control box • If the shutoff is not immediately available, use a non-conducting material to free the victim • If necessary and you know how, begin CPR when current is stopped • In dealing with electricity, never exceed your expertise

  5. Electrical Burns • Most common shock-related, nonfatal injury • Occurs when you touch electrical wiring or equipment that is improperly used or maintained • Typically occurs on the hands • Very serious injury that needs immediate attention

  6. Controlling Electrical Hazards • Most electrical mishaps are caused by a combination of three factors: • Unsafe equipment and/or installation, • Workplaces made unsafe by the environment • Unsafe work practices

  7. Clues that Electrical Hazards Exist • Tripped circuit breakers or blown fuses • Warm tools, wires, cords, connections, or junction boxes • GFCI that shuts off a circuit • Worn or frayed insulation around wire or connection

  8. Overload Hazards • If too many devices are plugged into a circuit, the current will heat the wires to a very high temperature, which may cause a fire • If the wire insulation melts, arcing may occur and cause a fire in the area where the overload exists, even inside a wall

  9. Preventing Electrical Hazards • Ways of protecting workers and preventing electrical hazards are: • Insulation • Grounding • Electrical protective devices (GFCI) • Safe work practices

  10. Insulation • Check insulation prior to using cables, tools, or equipment • Remove from service any tools or equipment with damaged insulation

  11. Cabinets, Boxes, and Fittings • Junction boxes, pull boxes and fittings must have approved covers • Unused openings in cabinets, boxes and fittings must be closed (no missing knockouts) 29 CFR 1910.305(b)(1) and (2)

  12. Grounding • Grounding creates a low-resistance path from a tool to the earth to disperse unwanted current • When a short or lightning occurs, energy flows to the ground, protecting you from electrical shock, injury and death

  13. Improper Grounding • Tools plugged into improperly grounded circuits may become energized • Broken wire or plug on extension cord • Some of the most frequently violated OSHA standards

  14. Hand-Held Electric Tools • Hand-held electric tools pose a potential danger because they make continuous contact with the hand • To protect you from shock, burns, and electrocution, tools must: • Have a three-wire cord with ground and be plugged into a grounded receptacle, or • Be double insulated 29 CFR 1910.304(f)(5)(v)(C)(3)

  15. Panel Boxes • Panel boxes are used to house circuit breakers that block or isolate energy • Ensure panel boxes remain clear • Label all circuits for what they control • Label panel boxes for what they control • Replace circuit breakers with blanks when not in use

  16. Final Advice Treat electricity with the respect it demands, and it will serve you efficiently and effectively Questions?

  17. UNITED STATES MARINE CORPS MARINE CORPS COMMUNITY SERVICES Certificate of Training This is to certify that Type name here HAS SATISFACTORILY COMPLETED Electrical Safety Online Training at Camp Lejeune, North Carolina Type date here Type here Employee ID # Date