NCCER Electrical Level 1 Module 9

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NCCER Electrical Level 1 Module 9

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Slide Content
  1. Device Boxes 26111-14

    Slide 1 - Device Boxes 26111-14

    • Conductors and Cables
    • 26109-11
  2. Objectives

    Slide 2 - Objectives

    • When trainees have completed this session, they should be able to do the following:
    • 1. Describe the different types of nonmetallic and metallic boxes.
    • 2. Calculate the NEC® fill requirements for boxes under 100 cubic inches.
    • 3. Identify the appropriate box type and size for a given application.
    • 4. Select and demonstrate the appropriate method for mounting a given box.  
    • Device Boxes 26109-14
  3. Performance Tasks

    Slide 3 - Performance Tasks

    • 1. Identify the appropriate box type and size for a given application.
    • 2. Select the minimum size pull or junction box for the following applications:
    • • Conduit entering and exiting for a straight pull.
    • • Conduit entering and exiting at an angle.
    • Device Boxes 26109-14
  4. 2.1.0

    Slide 4 - 2.1.0

    • Device Boxes 26109-14
    • American Wire Gauge (AWG)
    • It goes from 50 – 1 and the smaller the wire the larger the diameter.
  5. 2.1.2

    Slide 5 - 2.1.2

    • Device Boxes 26109-14
    • Stranding
    • The purpose of stranding is to increase the flexibility of the wire
  6. 2.4.4

    Slide 6 - 2.4.4

    • Device Boxes 26109-14
    • A color code is used to help identify wires by the color of the insulation. This makes it easier to install and properly connect the wires. A typical color code is as follows:
    • Two-conductor cable – One white or gray wire, one black wire, and a grounding wire (usually bare).
    • Three-conductor cable – One white or gray, one black, one red, and a grounding wire
    • Four-conductor cable – Same as three-conductor cable plus fourth wire (blue)
    • Five-Conductor cable – Same as four conductor cable plus fifth wire (yellow)
  7. 2.4.5

    Slide 7 - 2.4.5

    • Device Boxes 26109-14
  8. 2.5.0

    Slide 8 - 2.5.0

    • Device Boxes 26109-14
    • Fixture Wires
    • The decision of which fixture wire to use depends primarily upon the operating temperature that is expected within the fixture.
  9. 2.6.3

    Slide 9 - 2.6.3

    • Device Boxes 26109-14
    • Type UF is designed to be buried directly in the ground without any type of raceway.
  10. 2.6.4

    Slide 10 - 2.6.4

    • Device Boxes 26109-14
    • Type NMS = Non-Metallic Sheathed Cable
  11. 2.6.6

    Slide 11 - 2.6.6

    • Device Boxes 26109-14
    • Type MC Cable
    • Some of the typical uses for the three types of MC cable:
    • Services
    • Feeders
    • Branch Circuits.
  12. Wrap Up

    Slide 12 - Wrap Up

    • 3-2-1
    • 3 – Write 3 important things learned during class
    • 2 – Write 2 questions you have about the material
    • 1 – Write 1 thought you had about the material
    • Device Boxes 26109-14
  13. Next Session…

    Slide 13 - Next Session…

    • MODULE EXAM
    • Review the complete module to prepare for the module exam. Complete the Module Review as a study aid.
    • Device Boxes 26109-14