2 web sites of osha occupational safety and health

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[2] Web sites of OSHA (Occupational Safety and Health Administrations) [3] Web sites of ESFi (Electrical Safety Foundation International) [4] Web sites such as “All about circuits” Book Page 112
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EE for 21 st century 1-2 Avoid electrocution Unit 1-2-3 GFCI © 2015 Alexander Ganago Page 1 of 9 Last printed 2015-07-24 1:46 PM File: 2015 1-2-3 GFCI.docx Part 1: Enter the Electrical World Section 1-2 Safety: Avoid electrocution Unit 1-2-3: Household wiring, GFCI, and electrical safety rules The Goals: 1. Know how electric circuits are built in your house, in your car, and in public transportation. 2. Appreciate the necessity for safety features such as the 3 rd wire and GFCI 3. Know the rules of electrical safety; follow them at home and at work. As a result of learning in this Unit, you should be able to achieve the following Objectives: A. Be able to explain how electric circuits are built; for example, why your power outlet has three connections; why a switch in your car can be soldered only to one wire; what is the role of a chassis in an electronic circuit; and where are the wires that power a subway train. B. Explain the role of the 3 rd wire in a household power outlet; explain how the GFCIs save lives. C. Learn to identify the color of each wire connected to the power outlet in your house. D. Explain the ways for reducing the risk of electric shock at home and at work. E. Know and be able to explain the rules of electrical safety at home and at work. Develop the habit to follow these rules in order to save your life and the lives of people around you. Household wiring is subject to strict rules, which are formulated, updated and published every 3 years as the US National Electrical Code (NEC) since 1897. Although 2 conductors are enough to transfer power to the load, the 3 rd wire is added for safety. Another safety device is the Ground Fault Circuit Interrupter (GFCI). Learn how each of these devices saves lives, and make sure to have them installed where you live and work. The rules of electrical safety are based on the scientific data and common sense. As other safety rules, they are written with somebody’s blood. Follow them at workplace and at home: remember the hazards of electricity and avoid the danger. Table of contents Page Household wiring and Ground Fault Circuit Interrupter (GFCI) 2 Brief statistics on residential fires in the US (2009 – 2011) 7 The basic rules of electrical safety 7 Typical questions for self-assessment 8 Summary 9 Literature 9 Book Page 113
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EE for 21 st century 1-2 Avoid electrocution Unit 1-2-3 GFCI © 2015 Alexander Ganago Page 2 of 9 Last printed 2015-07-24 1:46 PM File: 2015 1-2-3 GFCI.docx H OUSEHOLD WIRING AND G ROUND F AULT C IRCUIT I NTERRUPTER (GFCI) An electric circuit is an interconnection of electrical elements linked together in a closed path to ensure that electric current can flow continuously.
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  • Fall '07
  • Ganago
  • Electric charge, Alexander Ganago

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