# NCCER Electrical Level 1 Module 9

Created 3 years ago

Duration 0:00:00
1044
Slide Content
1. ### Slide 1 - Device Boxes 26111-14

• Conductors and Cables
• 26109-11
2. ### 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. ### 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. ### 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. ### Slide 5 - 2.1.2

• Device Boxes 26109-14
• Stranding
• The purpose of stranding is to increase the flexibility of the wire
6. ### 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. ### Slide 7 - 2.4.5

• Device Boxes 26109-14
8. ### 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. ### 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. ### Slide 10 - 2.6.4

• Device Boxes 26109-14
• Type NMS = Non-Metallic Sheathed Cable
11. ### 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. ### Slide 12 - Wrap Up

• 3-2-1
• 3 – Write 3 important things learned during class
• 2 – Write 2 questions you have about the material