Jul 03, 2022  
2021-2022 Course Catalog 
    
2021-2022 Course Catalog [ARCHIVED CATALOG]

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ELT 172 - NEC Commercial/Industrial

Credits: 3
Lecture Hours: 3
Lab Hours: 0
Practicum Hours: 0
Work Experience: 0
Course Type: Voc/Tech
The basic principles of the NEC for layout and construction of commercial wiring and industrial wiring systems. Apply basics of wiring into the planning of typical commercial and industrial installations. Configure how load requirements are converted into branch circuits then into feeders, and into main electrical services.
Competencies
  1. Understand commercial and industrial building plans and specifications
    1. Explain the basic safety rules for working on electrical systems
    2. Discuss the project requirements from contract documents
    3. Demonstrate the application of building plans and specifications
    4. Show how to locate specific information on building plans
  2. Understand electrical drawings
    1. Explain how to read and interpret electrical symbols used in construction drawings
    2. Identify the electrical installation requirements using plans to a commercial building
    3. Identify the electrical installation requirements using plans to an industrial plant 
  3. Focus on calculating the electrical load
    1. Determine the minimum lighting load for a given area
    2. Determine the minimum receptacle loading for a given area
    3. Determine the minimum equipment loading
    4. Figuring the unbalanced load.
  4. Examine branch circuits
    1. Determine the required number of branch circuits for a set of loads
    2. Determine the correct rating for branch circuit protective devices
    3. Determine the preferred type of wire for a branch circuit
    4. Determine the required minimum size conductor for a branch circuit
  5. Analyze and understanding the different types of switches and receptacles
    1. Identify and select switches and receptacles with the proper ratings
    2. Demonstrate how to install different types of receptacles properly
    3. Demonstrate how to install different types of switches properly
    4. Understand the correct way to select raceway and the different types
    5. Discuss the requirements for raceway installation
    6. Determine the proper size of boxes to be installed
    7. Select proper size box that depends on the wire fill
    8. Select proper size box that depends on the raceways entering the box
  6. Define the terminology and code requirements for motor and appliance circuits
    1. Describe the word appliance used by the code
    2. Explain the appropriate method for installing electrical circuits to appliances
    3. Understand appropriate grounding for appliances
    4. Determine branch circuit ratings for appliances and motors
    5. Determine conductor sizes for appliances and motors
    6. Determine overcurrent protection for appliances and motors
    7. Understand the terms Type 1 and Type 2 protection using thermostats 
  7. Calculating feeders
    1. Calculating feeder loading
    2. Determine the minimum overcurrent protection rating
    3. Determine the minimum conductor size
    4. Determine the correction and adjustment factors
    5. Calculate voltage drops
    6. Calculate the reduction of neutral as required
    7. Determine minimum raceway size
    8. Selection and installation of panelboard
    9. Explain the correct way to select the panelboard
    10. Identification of circuits in a panelboard.
    11. Calculate the correct feeder size for panelboard
    12. Determine the correct overcurrent protection for a panelboard
  8. Wiring and installation of luminairs (fixtures), and lamps
    1. Understand technical terms associated with lamp selection
    2. Define lamps by their designations
    3. Properly select and install luminairs (fixtures)
    4. Calculating the lighting watts per square foot for a given space



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