2022 Electricity Systems Activity

UPDATED March 15, 2022

Associate Superintendent Contact Information

  • Sidney Bell, State Staff, Retired, Georgia Agricultural Education

  • University of Georgia, Athens, Georgia

  • Telephone (706)-612-4789

  • Email:sidneyrbell80@gmail.com

Purpose

The purpose of the Electrical Skill Activity is to provide students the opportunity to demonstrate critical thinking, problem solving, analytical and hands-on skills related to agricultural technology and mechanical systems and the practical application of those skills to meet the need of a dynamic agricultural workplace.

Possible activities for the 2022 event

  • 120/240 V branch circuits - Agricultural applications for lighting and receptacle loads.

  • Single Phase and/or Three-Phase Electric motors/motor control circuit.

  • Farm service Equipment - Service entrance for single phase 120/240V service or three-phase power.


Each of the possible activities could involve: Determining the correct size conductors, devices and overcurrent protection for specific circuit applications based on: ampacity, Ohm’s law, wire length and size, specific applications such as in air, in conduit, underground and preparing conductors and connecting devices.

Competencies

  • Use appropriate standards for agricultural applications, including the National Electrical Code (NEC), Electrical Testing Laboratory (ETL), Factory Mutual, Underwriters Laboratory (UL), Canadian Standard Association (CSA) and/or OSHA standards.

  • Identify the characteristics of single and three-phase circuits.

  • Plan and evaluate proper grounding systems and ground-fault protection.

  • Determine volt, amp and ohm relationships (Ohm’s and other application laws).

  • Select motors based upon type of application.

  • Interpret electric motor nameplate data.

  • Interpret electric motor wiring diagrams

  • Identify electric motors and motor parts.

  • Identify methods of providing electric motor protection.

  • Interpret power (horsepower, kilowatt), power factor, torque and other motor selection criteria.

  • Select appropriate wire sizes and protection devices for specific loads and lengths of circuits.

  • Read schematics and sketch wiring circuits.

  • Install service entrance for single phase 120/240V service or three-phase power.

Agriculture, Food and Natural Resources Content Standards

  • AS.05.01.01.c. Design an animal facility focusing on animal requirements, economic efficiency, sustainability, safety and ease of handling.

  • AS.05.01.02.c. Select, use and evaluate equipment, technology and handling procedures to enhance sustainability and production efficiency.

  • CS.03.04.01.b. Analyze and summarize protective equipment requirements on various AFNR tools and equipment.

  • C3.03.04.01.c. Design plans to ensure the use of appropriate protective equipment when using various AFNR tools and equipment.

  • C3.06.04.02.c. Evaluate and select appropriate tools and equipment to complete AFNR tasks.

  • CRP.02.01.01.b. Assess workplace problems and identify the most appropriate academic knowledge and skills to apply.

  • PST.03.02.01.c. Analyze and design electrical circuits for AFNR power, structural and technical systems using knowledge of the basic units of electricity.

  • PST.03.02.02.b. Analyze and interpret electrical system symbols and diagrams.

  • PST.04.04.01.b. Assess and analyze the electrical requirements of an AFNR structure.

  • PST.04.04.01.c. Install and/or repair fixtures following appropriate codes and standards.

  • PST.04.04.02.c. Plan and wire electrical circuits (i.e., single pole switch, three-way switch, duplex outlet, etc.).

Suggested Resources

  • NFPA 70, 2020 National Electric Code, National Fire Protection Association

  • Agricultural Wiring Handbook (17th ed. or later).

  • Electrical Wiring (7th ed. or later) by Ralph Duncan & James E. Wren. Available from AAVIM

  • Electrical Controls (2nd ed.) by James M. Allison. Available from AAVIM

  • Basics of Electric Motors (1st ed.) by Ivan Winsett. Available from AAVIM

Please review the general references for the CDE. - CDE rules