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## Electrician's Math

### Subject

Math, Science & Technology, Career Development and Occupational Studies, Literacy in Science and Technical Subjects (NYS 6-12 Common Core)

### Assessment

Student calculation of the amperage usage in a sample house is evaluated on the basis of specified rubric.

### Author

Anthony George, Attica Senior High School

### Source

George, Anthony. “Electrician's Math.” In Career Development and Occupational Studies (CDOS) Resource Guide with Core Curriculum. New York State Department of Education, 197.

1 Week

### Description

Objective:

Students will use formulas to calculate the number of amperes a typical house could use.

Activity:

• Students, working in groups or as a class, determine the typical electrical devices found in a home. (Don't forget the lights!)
• Students determine the wattage rating of each device. Students check the nameplates of appliances, contact local appliance stores, or use the Internet to gather the specific information.
• Students use the formula, Wattage = Voltage X Ampere, to calculate the amount of current for each appliance.
• The information is to be included in a spreadsheet. Students calculate the total number of amperes.
• Students discuss the concerns of an electrician (e.g., regarding whether or not all devices would be used simultaneously).
• Discuss the most efficient way (mathematically) to reduce use of electricity.

• Computer