The following 10 slides represent a Sample Preview from this Training Presentation

1. The following 10 slides represent a Sample Preview from this Training Presentation The complete “OSHA 600” based PowerPoint Presentation is available for subscribers to EH&S Manager Online. © 2003 Seton Identification Products

2. ELECTRICAL WORK PRACTICES Hazardous (Classified) Locations Electrical Safety Work Practices Work Practice Selection and Use Equipment Use Personal Protection Safeguards.

3. Introduction • This module is based on 29 CFR 1910 Subpart S and covers electrical work requirements designed to minimize potential accidents. The Occupational Safety and Health Administration’s (OSHA) standards were developed to cover electrical system parts an employee would normally use or contact. In general, all equipment should be de-energized before an employee works on it. • Otherwise, protective equipment and insulated tools are required. © 2003 Seton Identification Products

4. Objectives • At the end of the Electrical Work Practices module, you should be able to: • Identify hazardous locations • Define proper safety related work practices • Define safeguards for personal protection. © 2003 Seton Identification Products

5. Hazardous (Classified) Locations • Hazardous (classified) locations present a real threat to worker safety. • They are areas where a potential for explosion and fire exist due to the presence of flammable: • Gases • Vapors • Finely pulverized dusts • Ignitable fibers or flyings. • The Hazardous (Classified) Locations section is based on 29 CFR 1910.307. © 2003 Seton Identification Products

6. Hazardous (Classified) Locations • It presents a description of and the requirements for working in hazardous (classified) locations. • This section covers the topics listed on the left. • 29 CFR 1910.307 is based on the National Electrical Code (NEC), NFPA 70. © 2003 Seton Identification Products

7. Causes • Hazardous locations can be found in most workplaces. • A hazardous (classified) location may result from the normal processing of certain volatile chemicals, gases, grains, etc., or it may result from accidental failure of storage systems for these materials. © 2003 Seton Identification Products

8. Causes • It is also possible that a hazardous location may occur when volatile solvents or fluids, used in a normal maintenance routine, vaporize to form an explosive atmosphere. • Each room, section, or area shall be considered individually when determining hazardous classification. © 2003 Seton Identification Products

9. Precaution • Despite the hazards of a location, every precaution must be taken to guard against ignition of the atmosphere. • Certainly no open flames are permitted in these locations. • Electric equipment capable of igniting flammable materials or gases shall not be used, unless measures are taken to prevent hazardous conditions from developing. • There are many ways in which electrical equipment can act as a source of ignition in a hazardous location: © 2003 Seton Identification Products

10. Precaution • Switches, circuit breakers, motor starters, contactors, plugs, and receptacles all release arcs and sparks as contacts open and close during normal operation • Lighting fixtures and motors are classified as "heat producing". They will become a source of ignition if their surface temperature exceeds the ignition temperature of the flammable material or gas • An abnormality or failure in an electrical system, such as the failure of insulation, can release sparks, arcs, or heat. © 2003 Seton Identification Products

11. Wiring Installation • It is important to have an awareness of the problems that electrical equipment and wiring create when they are located in hazardous (classified) locations because several OSHA standards require the installation of electrical wiring and equipment in these locations. • Most of these locations are defined in the "Hazardous (Classified) Locations" module available from the "Hazardous Materials" selection on the main menu. © 2003 Seton Identification Products

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