Maricopa Community Colleges  ABA202   19964-20032 
Official Course Description: MCCCD Approval: 04/23/96
ABA202 19964-20032 LEC 1 Credit(s) 1 Period(s)
Conductor Selection and Calculations
Conductor characteristics and selection criteria for specific applications. National Electrical Code (NEC) regulations governing conductors and conductor protection methods for single and branch circuits. Calculations for voltage drop and sizing for specific Loads. Prerequisites: (Indentured status with the Arizona Builders Alliance and ABC142) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA202   19964-20032 Conductor Selection and Calculations
1. List and define terminology related to electrical conductors and describe characteristics of specific conductors. (I)
2. Select conductors for specific applications. (II)
3. Interpret and apply specific NEC regulations governing conductors including parallel rules, tap rules and tables 310- 16 through 310-19. (II)
4. Describe conductor protection methods for single and branch circuits. (II)
5. Describe specific properties of conductors by using NEC tables and identify conductors through color coding. (III)
6. Calculate the size of conductors required for specific Loads and voltage drop in "single" and "three phase" applications. (IV)
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MCCCD Official Course Outline:
 
ABA202   19964-20032 Conductor Selection and Calculations
    I. Electrical conductors
        A. Terminology
          1. AWG (American Wire Gage)
          2. cable
          3. cable, coaxial
          4. cable, duplex
          5. cable, service drop
          6. cable, tray
          7. cable, tri-plex
          8. cable, vertical riser
          9. other
        B. Characteristics
          1. method of stranding
          2. degree of hardness
          3. bare, tinned, or coated
          4. size
        C. Compressed conductors
      II. Conductor applications
          A. NEC regulations
            1. NEC 240
            2. NEC 240-3
            3. NEC 240-20(a)
            4. NEC 240-21
            5. Tables 310-16 to 310-19
          B. Feeder circuits
          C. Branch circuits
          D. Conductor protection
            1. non-current limiting device
            2. current limiting device
          E. Fuse location in circuits
        III. Properties of conductors
            A. NEC property tabulation
              1. name
              2. operating temperature
              3. application
              4. insulation
              5. physical properties
              6. electrical resistance
              7. AC (alternating current) resistance and reactance
            B. Identifying conductors
              1. color coding
              2. changing colors
          IV. Conductor sizing and voltage drop
              A. Wire sizes based on resistance
                1. circular mil-unit of conductor area
                2. conversion of square mils to circular mils
              B. Resistance of conductors
              C. Resistance of copper per mil foot
              D. Equations for conductor area
                1. Load current
                2. permissible voltage drop
                3. length of conductor
                4. type of wire
              E. Voltage drop equations
                1. single phase
                2. three phase
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