Maricopa Community Colleges  ABA130   19972-20032 
Official Course Description: MCCCD Approval: 10/22/96
ABA130 19972-20032 LEC 1 Credit(s) 1 Period(s)
Installation of Electric Services
Electric services for commercial and industrial installations. Blueprints, diagrams and electrical calculations. Grounding, connecting three phase services and the installation of panelboards, switches and load centers. Prerequisites: (Indentured status with the Arizona Builders Alliance and ABC130) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA130   19972-20032 Installation of Electric Services
1. List and define trade terms associated with the installation of electric services. (I)
2. Describe specific types of electric services for commercial and industrial installations. (II)
3. Demonstrate the ability to read blueprints and diagrams describing service installations. (III)
4. Compute circuit loads, number of circuits required and the installation requirements of distribution panels. (IV)
5. Explain specific types and purposes of service grounding. (V)
6. Describe both wye and delta connected three-phase services. (VI)
7. Describe the installation of panelboards, switches and load centers. (VII)
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MCCCD Official Course Outline:
 
ABA130   19972-20032 Installation of Electric Services
    I. Trade Terms
        A. Delta connection
        B. Service
        C. Service cable and conductors
        D. Service drop
        E. Service entrance
        F. Service equipment
        G. Service lateral
        H. Service raceway
        I. Star connection
        J. Substation
        K. Wye connection
      II. Electric Service - Commercial and Industrial
          A. Service head
          B. Service entrance
          C. Service-entrance conductors
          D. Service-entrance equipment
            1. Metering equipment
            2. Service disconnector
          E. Service lateral
        III. Reading Blueprints and Diagrams
            A. Floor plan
            B. Power-riser diagram
            C. Panelboard schedule
            D. Panelboard specifications
          IV. Service Computations
              A. Single-phase, 3 wire, 120/240 Volts
              B. Three-phase, 4 wire wye-connected secondary
              C. Four-wire delta-connected secondary
              D. Center-tap delta-connected system
            V. Service Grounding
                A. National Electrical Code (NEC) Article 250
                B. Grounding electrode conductor
                C. Grounding electrode
                D. Grounded service conductor (neutral)
                E. Size requirements - NEC Table 250-94
              VI. Three-Phase Services
                  A. Current transformers
                    1. Busbar
                    2. Doughnut
                    3. CT cabinet
                  B. Gutters - bus bracing
                  C. 480/277-Volt services
                VII. Panelboards, Switches and Load Centers
                    A. Panelboards
                      1. Flush mounted
                      2. Surface mounted
                      3. Circuit breakers or fuses
                    B. Panel installation
                      1. Panel interior
                      2. Knockouts
                    C. Panel connections
                      1. Line
                      2. Load
                    D. Safety switches
                      1. Heavy duty
                      2. General duty
                      3. Contacts
                      4. Insulating materials
                      5. Operating mechanism
                    E. Load centers
                      1. Main lug
                      2. Main breaker
                      3. Split-bus
                    F. Troubleshooting
                      1. Clean
                      2. Dry
                      3. Tight
                      4. Friction-free
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