Associate Superintendent Contact Information
Sidney Bell, State Staff, Retired, Georgia Agricultural Education
University of Georgia, Athens, Georgia
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.
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.).
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