Maricopa Community Colleges  ELC125   19956-99999 
Official Course Description: MCCCD Approval: 06/27/95
ELC125 19956-99999 LEC 3 Credit(s) 3 Period(s)
Commercial Electrical Wiring and Codes
Indepth study of commercial electrical power distribution techniques of low voltage (under 600 volt) systems. Selection of electrical distribution components, single and three systems, on-line diagrams and conductor selection. System grounding, planning and over current protection. Prerequisites: ELC123 or permission of instructor.
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MCCCD Official Course Competencies:
 
ELC125   19956-99999 Commercial Electrical Wiring and Codes
1. Identify specific project information from plans and specifications. (I)
2. Describe the application of one-line diagrams of power systems and identify symbols. (I)
3. Calculate load based on National Electrical and Local Electrical Codes for specific low voltage systems. (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 specific applications. (III)
7. Select the proper conduit and size for specific installations. (IV)
8. List methods and calculate for over-current protection in branch circuits. (V)
9. Compare and contrast specific low voltage systems, including diagramming of special circuits. (VI)
10. Selection and describe installation of lighting fixtures for commercial occupancies. (VII, VIII)
11. Describe electrical distribution system planning factors and procedures including application of ground fault requirements. (IX)
12. Calculate transformer applications. (IX)
13. List and size services for commercial applications(IX)
14. Describe and determine grounding and bonding requirements. (IX)
15. Describe and compare emergency power systems. (X)
16. Describe operation of over-current devices. (XI)
17. Compare short circuit calculations and coordinate over-current protection. (XII)
18. Compare short circuit protection of specific equipment. (XIII)
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MCCCD Official Course Outline:
 
ELC125   19956-99999 Commercial Electrical Wiring and Codes
    I. Commercial Building Plans and Specifications
        A. Specific Information
        B. Symbols
        C. Calculate Plan Dimensions
      II. Branch Circuits and Feeders-Calculations
          A. Minimal Loading
          B. Minimum Number of Branch Circuits
          C. Current in 10/30 Circuits
          D. Size of Branch and Feeder Circuits
          E. Conductors
          F. Voltage Drop in 10 Circuits
        III. Switches and Receptacles
            A. Switches and Receptacles with the Proper Rating
            B. Types of Receptacles
            C. Single Pole, Three-way, Four-way and Double Pole Switches
          IV. Branch Circuit Installation
              A. Rigid/EMT Conduit Systems Installation
              B. Conduit Size/Calculation
              C. Box Sizes
              D. Support
              E. CU/AL (Copper/Aluminum) conductors
            V. Appliance and Office Circuits
                A. Appliance/Utilization Equipment Needs
                B. Branch Circuit Size, Over-current Protection for Applications
                C. Requirements
                D. Material Requirements
              VI. Special Systems/Circuits
                  A. Surface Metal Raceways and Multi-outlet Assemblies
                  B. Communication and Floor Outlet Assemblies
                  C. Diagramming Photocell and Timer Controls
                  D. Electric Boiler Controls
                  E. Sump Pump Circuit
                VII. Lamps for Commercial Lighting
                    A. Types
                    B. Technical terms
                    C. Parts and Operating Characteristics
                    D. Installation
                  VIII. Panel Board Selection and Installation
                      A. Selection of Panel Boards Re: Required Branch Circuits
                      B. Connection of Branch Circuits
                      C. Feeder Size Selection
                    IX. Selection of Service Equipment- Planning factors
                        A. Installation of Transformer
                        B. Basic Transformers Connection/applications
                        C. Service Types
                        D. Metering Equipment
                        E. Ground fault requirements
                        F. Commercial applications
                        G. Grounding and bonding
                      X. Emergency Power System
                          A. Selection and Sizing
                          B. Installation System
                        XI. Over-Current Protection and Operation
                            A. Class and types of Fuses
                            B. Operation of Fuses and Circuit Breakers
                            C. Understanding of Switch Sizes and Ratios
                            D. Definitions
                            E. Selection and Installation of Over-current Protective Devices
                            F. Fuse Shorts
                          XII. Short Circuit Calculations and Co-ordination of Over-current Devices
                              A. Short Circuit Calculations
                              B. Definitions
                              C. Time/Current Curves
                            XIII. Equipment and Conductor Short Circuit Protection
                                A. Equipment/Conductor Withstand Rating
                                B. Definitions
                                C. Calculations
                                D. Charts
                                E. Understanding Thermal and Magnetic Forces
                                F. Top Rules
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