Maricopa Community Colleges  ELC116   19944-20086 
Official Course Description: MCCCD Approval: 07/22/08
ELC116 19944-20086 LEC 3 Credit(s) 3 Period(s)
Commercial Electrical Power Distribution
Commerical electrical power distribution techniques of low voltage (under 600 volts) systems. Selection of electrical distribution components, single and three-phase systems, one-line diagrams and conductor selection. System grounding, planning and overcurrent protection.
Prerequisites: ELC162 or permission of Instructor.
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MCCCD Official Course Competencies:
 
ELC116   19944-20086 Commercial Electrical Power Distribution
1. Explain project information from specific plans and specifications. (I)
2. Describe the application of one-line diagrams of power systems and interpret symbols. (I)
3. Calculate load calculations based on national electrical and local electrical codes for specific low voltage systems projects. (I, II)
4. Describe voltage drop and derate of conductors. (II)
5. Demonstrate proper procedures for sizing conductors, boxes and wiring methods. (II, IV)
6. Select switches and receptacles for a particular application. (III)
7. Select the proper conduit and size for a given installation. (IV)
8. List methods and calculate for overcurrent protection. (V)
9. Compare and contrast specific low voltage systems, including diagramming of special circuits. (VI)
10. Select and describe installation of lighting fixtures for commercial occupancies. (VII)
11. Describe electrical distribution system planning factors and procedures including application of ground fault requirements. (VIII)
12. Describe and calculate transformer applications. (VIII)
13. List and size services for commercial applications. (VIII)
14. Describe and determine grounding and bonding requirements for a specific application. (IX)
15. Describe operation of overcurrent devices. (X)
16. Compare short circuit calculations for specific applications and coordinate overcurrent protection. (XI)
17. Compare specific equipment for short circuit protection. (XII)
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MCCCD Official Course Outline:
 
ELC116   19944-20086 Commercial Electrical Power Distribution
    I. Commercial building plans and specifications
        A. Specific information on plans
        B. Symbols
        C. Calculate plan dimensions
        D. One-line diagrams
      II. Branch circuits and feeders
          A. Calculation of minimal loading
          B. Determine the minimum number of branch circuits
          C. Calculation of current in 1 phase/3 phase circuits
          D. Determine the correct size of branch and feeder circuits
          E. Derate conductors
          F. Calculate voltage drop in 1 phase circuits
        III. Switches and receptacles
            A. Selection of switches and receptacles with the proper rating
            B. Installation of various types of receptacles
            C. Connection of single pole, three-way, four-way and double pole switches
          IV. Branch circuit installation:
              A. Examine the installation of rigid/EMT conduit systems
              B. Selecting correct conduit size/calculations
              C. Selecting correct box sizes
              D. Proper recovery support
              E. Connection copper/aluminum conductors
            V. Appliance and office circuits
                A. Determining appliance/utilization equipment and needs
                B. Determine branch circuit size, overcurrent protection for appliances
                C. Grounding requirements
                D. Determine material requirements
              VI. Special systems/circuits
                  A. Installation of surface metal raceways and multi outlet assemblies
                  B. Installation of communication and floor outlet assemblies
                  C. Diagramming photocell and timer controls
                  D. Electric boiler controls
                  E. Sump pump of luminaries
                VII. Lamps for lighting - commercial
                    A. Types of lamps used
                    B. Technical terms of lighting
                    C. Parts and operating characteristics of lamps
                    D. Installation of luminaries
                  VIII. Selection of service equipment - planning
                      A. Installation of transformers
                      B. Basic transformer connections
                      C. Service types
                      D. Metering equipment
                      E. Ground fault requirements
                      F. Commercial
                    IX. Emergency power systems
                        A. Selection and sizing of emergency power systems
                          1. Selection
                          2. Sizing
                        B. Installation of systems
                          1. Grounding
                          2. Bonding
                      X. Overcurrent protection and operation
                          A. Class and types of fuses
                          B. Operation of fuses and circuit breakers
                          C. Switch sizes and ratings
                          D. Definitions
                          E. Selection and installation of overcurrent protective devices
                          F. Fuse charts
                        XI. Short circuit calculations and coordination of overcurrent devices
                            A. Perform short circuit calculations
                            B. Definitions
                            C. Use time/current curves
                          XII. Equipment and conductor short circuit protection
                              A. Equipment/conductor with stand rating
                              B. Definitions
                              C. Calculations
                              D. Charts
                              E. Understanding thermal and magnetic forces
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