Manufacturing Engineering Residential Electrical Controls and Wiring Lesson Plan Performance Objectives After completing this lesson, students will be able to describe how to use and troubleshoot residential electrical controls and wiring to the teacher’s satisfaction. Specific Objectives Discuss the purpose of residential (household) electrical controls Research and discuss terms used in typical residential (household) electrical wiring schematics Discuss residential electrical devices and schematics Terms Alternating current- electrical current that changes direction and strength; primarily used by power companies for distribution to residential areas Ampere- a unit of measurement for electrical current Circuit- a path made of conductors and electrical components to allow flow of electrical current Circuit breaker- a switch designed to stop the flow of electric current through a circuit if the current reaches excessive levels (i.e., short circuit) Conductor- metal designed and shaped to permit the flow of electrical current Electrical codes- formal written regulations, designed to ensure work on electrical systems meet safety standards (i.e., shock and fire prevention)/ National Electrical Code (NEC) Electrical meter- a measuring device used to determine the amount of electricity used in a residence; electrical energy is usually measured in kilowatt hours Ground- a return path for electrical circuits to the earth; provides protection in case a “short circuit” occurs Incandescent lamp- a commonly used light bulb that provides lighting by using electricity to heat a metal filament wire until it glows brightly Overload- occurs when wiring or electrical components receive more electrical current than the system was designed for and can create excessive heat and fires Power receptacle- devices designed to connect appliances and electrical equipment to a power source to allow the flow of electrical current Short circuit- a defective connection that occurs within an electrical circuit that bypasses the normal flow of current; can create excessive current flow, heat and component damage Volt- a unit of measurement for the force of electricity through a circuit Watt- a unit of measurement for the power of electricity through a circuit Time When taught as written, this lesson should take approximately 180 minutes. Copyright © Texas Education Agency, 2013. All rights reserved. 1 Preparation TEKS Correlations This lesson, as published, correlates to the following TEKS. Any changes/alterations to the activities may result in the elimination of any or all of the TEKS listed. Manufacturing Engineering 130.329 (c) o (5) The student performs functions and solves problems in the electricity and electronics field. The student is expected to: (A) develop solutions to use control devices; and (B) troubleshoot control devices. Interdisciplinary Correlations English Language Arts and Reading, English I 110.31 (b) o (1) Reading/Vocabulary Development. Students understand new vocabulary and use it when reading and writing. 110.31 (b) o (11) Reading/Comprehension of Informational Text/Procedural Texts. Students understand how to glean and use information in procedural texts and documents. Algebra I 111.32 (b) o (1) Foundations for functions. The student understands that a function represents a dependence of one quantity on another and can be described in a variety of ways. (E) interpret and make decisions, predictions, and critical judgments from functional relationships World Geography Studies 113.43 (c) o (19) Science, technology, and society. The student understands the impact of technology and human modifications on the physical environment. The student is expected to: (A) evaluate the significance of major technological innovations in the areas of transportation and energy that have been used to modify the physical environment; (B) analyze ways technological innovations such as air conditioning and desalinization have allowed humans to adapt to places; and (C) examine the environmental, economic, and social impacts of advances in technology on agriculture and natural resources. 113.43 (c) o (20) Science, technology, and society. The student understands how current technology affects human interaction. The student is expected to: Copyright © Texas Education Agency, 2013. All rights reserved. 2 (A) describe the impact of new information technologies such as the Internet, Global Positioning System (GPS), or Geographic Information Systems (GIS); and (B) examine the economic, environmental, and social effects of technology such as medical advancements or changing trade patterns on societies at different levels of development. Occupational Correlation (O*Net – www.onetonline.org/) Job Title: Electrician O*Net Number: 47-2111.00 Similar Job Titles: Electrician, Maintenance Electrician, Journeyman Electrician, Inside Wireman, Control Electrician, Electrician Technician, Industrial Electrician, Journeyman Wireman Tasks Maintain current electrician's license or identification card to meet governmental regulations Connect wires to circuit breakers, transformers, or other components Repair or replace wiring, equipment, or fixtures, using hand tools or power tools Test electrical systems or continuity of circuits in electrical wiring, equipment, or fixtures, using testing devices, such as ohmmeters, voltmeters, or oscilloscopes, to ensure compatibility and safety of system Plan layout and installation of electrical wiring, equipment, or fixtures, based on job specifications and local codes Diagnose malfunctioning systems, apparatus, or components, using test equipment and hand tools to locate the cause of a breakdown and correct the problem Soft Skills Critical Thinking/ Operation Monitoring/ Active learning and listening/ Troubleshooting Accommodations for Learning Differences It is important that lessons accommodate the needs of every learner. These lessons may be modified to accommodate your students with learning differences by referring to the files found on the Special Populations page of this website. Preparation Review and familiarize yourself with the terminology, website links, and the slide presentation. Have materials, slide presentation, and websites ready to go prior to the start of the lesson. References http://websters.yourdictionary.com http://www.thefreedictionary.com Instructional Aids Residential Electrical Controls and Wiring slide presentation and notes Residential Electrical Controls and Wiring Matching Terms and Definitions handout for each student Copyright © Texas Education Agency, 2013. All rights reserved. 3 Residential Electrical Controls and Wiring Matching Terms and Definitions Answer Key Warm-up Activity (slide 3) Residential Electrical Controls and Wiring Quiz for each student Residential Electrical Controls and Wiring Quiz Answer Key Introduction The main purpose of this lesson is to help students understand residential (household) electrical controls and terms used in typical residential electrical wiring schematics. Ask: Have you ever thought about how important electrical energy is to your daily life? Ask: Have you ever talked to a senior citizen about how much manual labor they were required to do when they were young? Say: We will discuss how electrical energy has removed most manual labor from our lives. Copyright © Texas Education Agency, 2013. All rights reserved. 4 Outline MI OUTLINE NOTES TO TEACHER I. Introduction and start of lesson A. Bell Work Activity B. Warm-up Activity Begin the Residential Electrical Controls and Wiring slide presentation. II. Residential electrical controls and wiring A. Overview B. Electricity as an energy source Have students work on the Bell Work Activity. (slide 2) III. Electrical terms and system layout A. Residential electrical terms B. System layout IV. Administer Quiz at end of lesson Warm-up Activity: Using Residential Electrical Controls and Wiring Matching Definitions handout, students (in pairs) will teach each other the terms and definitions. They may do computer-based research to look up the meaning. (slide 3) Discuss additional natural forms of electricity and alternative electrical energy sources. (slides 4-5) Each slide is meant to be discussed. Have some background knowledge, and challenge the students to make some contributions to the discussion. Ensure students understand the definition and function of each term. (slides 6-7) Carefully discuss the layout of the cabin and how the components are controlled by electrical current. (slide 8) Use answer key to grade the quiz. Copyright © Texas Education Agency, 2013. All rights reserved. 5 Multiple Intelligences Guide Existentialist Interpersonal Intrapersonal Kinesthetic/ Bodily Logical/ Mathematical Musical/Rhythmic Naturalist Verbal/Linguistic Visual/Spatial Application Guided Practice The teacher and students search the Internet to find different sources to gain more insight into: Unique ways electrical energy sources are created around the globe Companies using cutting edge technology to create new electrical energy sources Independent Practice Students write a 50 word essay on electrical energy from wind power. Students research the impact of deregulation of the electrical power industry online. Summary Review Students review the terms from the Warm-up Activity and key points from the Residential Electrical Controls and Wiring slide presentation. Evaluation Informal Assessment Teacher will assess students with oral questions and answers. Students will discuss definitions of terms and key points from the Residential Electrical Controls and Wiring slide presentation. Formal Assessment Teacher will administer the Residential Electrical Controls and Wiring Quiz. Enrichment Extension Students will research and write a paper about Thomas Edison and his contributions to the electrical industry on the Internet. Copyright © Texas Education Agency, 2013. All rights reserved. 6 Name___________________________________Date______________________Class_______________ Manufacturing Engineering Residential Electrical Controls and Wiring Matching Terms and Definitions Directions- Match the terms in Section 1 with the definitions in Section 2 (next page). Section 1 A. Alternating current B. Ampere C. Circuit D. Circuit breaker E. Conductor F. Electrical codes G. Electrical meter H. Ground I. Incandescent lamp J. Overload K. Power receptacle L. Short circuit M. Volt N. Watt Copyright © Texas Education Agency, 2013. All rights reserved. 7 Section 2 1. _____ a unit of measurement for the force of electricity through a circuit 2. _____ a defective connection that occurs within an electrical circuit that bypasses the normal flow of current; can create excessive current flow, heat and component damage 3. _____ occurs when wiring or electrical components receive more electrical current than the system was designed for and can create excessive heat and fires 4. _____ a unit of measurement for the power of electricity through a circuit 5. _____ a return path for electrical circuits to the earth; provides protection in case a “short circuit” occurs 6. _____ device designed to connect appliances and electrical equipment to a power source to allow the flow of electrical current 7. _____ a switch designed to stop the flow of electrical current through a circuit if the current reaches excessive levels (i.e., short circuit) 8. _____ a commonly used light bulb that provides lighting by using electricity to heat a metal filament wire until it glows brightly 9. _____ a measuring device used to determine the amount of electricity used in a residence; electrical energy is usually measured in kilowatt hours 10. _____ a path made of conductors and electrical components to allow flow of electrical current 11. _____ a unit of measurement for electrical current 12. _____ metal designed and shaped to permit the flow of electrical current 13. _____ electrical current that changes direction and strength; primarily used by power companies for distribution to residential areas 14. _____ formal written regulations, designed to ensure work on electrical systems meet safety standards (i.e., shock and fire prevention) Copyright © Texas Education Agency, 2013. All rights reserved. 8 Manufacturing Engineering Residential Electrical Controls and Wiring Matching Terms and Definitions Answer Key 1. M. Volt- a unit of measurement for the force of electricity through a circuit 2. L. Short circuit- a defective connection that occurs within an electrical circuit that bypasses the normal flow of current; can create excessive current flow, heat and component damage 3. J. Overload- occurs when wiring or electrical components receive more electrical current than the system was designed for and can create excessive heat and fires 4. N. Watt- a unit of measurement for the power of electricity through a circuit 5. H. Ground- a return path for electrical circuits to the earth; provides protection in case a “short circuit” occurs 6. K. Power receptacle- device designed to connect appliances and electrical equipment to a power source to allow the flow of electrical current 7. D. Circuit Breaker- a switch designed to stop the flow of electrical current through a circuit if the current reaches excessive levels (i.e., short circuit) 8. I. Incandescent lamp- a commonly used light bulb that provides lighting by using electricity to heat a metal filament wire until it glows brightly 9. G. Electrical meter- a measuring device used to determine the amount of electricity used in a residence; electrical energy is usually measured in kilowatt hours 10. C. Circuit- a path made of conductors and electrical components to allow flow of electrical current 11. B. Ampere- a unit of measurement for electrical current 12. E. Conductor- metal designed and shaped to permit the flow of electrical current 13. A. Alternating current- electrical current that changes direction and strength; primarily used by power companies for distribution to residential areas 14. F. Electrical codes- formal written regulations, designed to ensure work on electrical systems meet safety standards (i.e., shock and fire prevention) Copyright © Texas Education Agency, 2013. All rights reserved. 9 Name_____________________________________Date_______________________Class_____________ Manufacturing Engineering Residential Electrical Controls and Wiring Quiz 1. _____________________is a natural phenomenon that occurs ________________________________. 2. As our _______________, we learned to __________________________ and control it for our benefit. 3. American homes receive energy from ______________________ and the energy is ________________ throughout the house through the use of _________________________________________________. 4. Uncontrolled electrical energy is _______________ and _____________________________________. You should ___________________________________________ on electrical systems or devices unless ___________________________________________. 5. Electrical voltage from the power company is usually _______________ volts. 6. All electrical circuits are required to be _______________and the ___________________ is buried in the earth and provides ____________________________________ if an appliance is damaged or shorted. Copyright © Texas Education Agency, 2013. All rights reserved. 10 Manufacturing Engineering Residential Electrical Controls and Wiring Quiz Answer Key 1. Electricity is a natural phenomenon that occurs throughout our planet. 2. As our technology evolved, we learned to harness electricity and control it for our benefit. 3. American homes receive energy from power companies and the energy is distributed throughout the house through the use of wires, switches, and receptacles. 4. Uncontrolled electrical energy is dangerous and can cause serious injury or death. You should never try to make repairs on electrical systems or devices unless you are qualified to do so. 5. Electrical voltage from the power company is usually 120 or 240 volts. 6. All electrical circuits are required to be grounded and the ground wire is buried in the earth and provides a path for electricity to escape if an appliance is damaged or shorted. Copyright © Texas Education Agency, 2013. All rights reserved. 11