Description:

This course covers commercial wiring methods. Upon successful completion of this course, the student should be able to read commercial blueprints and apply the current National Electrical Code to commercial wiring systems. The student will gain working knowledge and hands-on experience with commercial wiring techniques. The student will be required to provide ANSI Z87 safety glasses and may be expected to provide other basic hand tools and/or equipment. 3 hrs. lecture, 3 hrs. lab/wk.

Associated Costs: These are additional (out-of-pocket) expense considerations that students should expect in addition to the course tuition, fees, and textbooks. $125 to $300.

Supplies: Refer to the instructor’s course syllabus for details about any supplies that may be required.

Textbook(s): For information see - http://bookstore.jccc.net

Course Fees: NONE

Course Objectives:

Upon successful completion of this course the student should be able to:

1. Describe commercial building plans and specifications.
2. Identify commercial electrical and architectural drawings.
3. Describe and install commercial branch circuits feeders.
4. Describe switches and receptacles used in commercial applications.
5. Describe and install commercial appliance circuits.
6. Describe and install surface metal raceway, multi-outlet assemblies, communication circuits and floor outlets.
7. Compute branch circuit calculations and lay out a raceway system.
8. Solve commercial lighting calculations and complete light fixture installations.
9. Demonstrate panelboard selection and installation and special circuit installation.
10. Demonstrate commercial electrical service installation.
11. Define emergency power systems and overcurrent protection.
12. Describe low voltage remote-control lighing systems and sizes feeders for cooling systems.
13. Demonstrate safe work practices.

Content Outline & Competencies:

I. Commercial Building Plans and Specifications
   A. Identify commercial building specifications (Overview).
   B. Interpret specifications.
   C. Describe supplementary general conditions.
   D. Demonstrate safety practices in the lab.

II. Electrical and Architectural Drawings (Prints) - Drugstore
   A. Interpret the elevation drawings on the drugstore prints.
   B. Identify the location of the electrical requirements on the
drugstore prints.

III. Commercial Branch Circuits and Feeders
   A. Calculate a branch-circuit from the load demand.
   B. Explain the rules for branch circuits.
   C. Determine conductor size and type.
   D. Use correction factors for ambient temperature.
   E. Explain derating factors (ampacity adjustment) for more than three
current-carrying conductors in one raceway.
   F. Calculate overcurrent protection and circuit rating.
   G. Explain conductor selection procedure.
   H. Calculate voltage drop.
   I. Determine voltage loss.
   J. Describe energy savings considerations.

IV. Electrical Drawings for the  Bakery
   A. Locate the electrical requirements on the bakery prints.
   B. Explain the engineer's notes on  the bakery prints.

V. Switches and Receptacles
   A. Install receptacles in a wall space.
   B. Explain hospital grade receptacles.
   C. Install ground-fault circuit interrupters receptacles (NEC Section
210.8).
   D. Explain the rules for receptacles in electric baseboard heaters.

VI. Installation of a Branch-Circuit 
   A. Describe rigid metal conduit.
   B. Describe intermediate metal conduit.
   C. Use electrical metallic tubing (NEC Article 348) in a branch
circuit.
   D. Describe flexible connections (NEC Articles 350 and 351).
   E. Describe rigid nonmetallic conduit.
   F. Calculate a raceway size.
   G. Select a box style and size.

VII. Appliance Circuits (Bakery)
   A. Identify Bakery Appliances (NEC Article 422) on the blueprint.
   B. Explain the use of the exhaust fan (connected to a lighting branch
circuit).
   C. Describe the basics of motor circuits.
   D. Calculate the conductor size for several motors on one feeder.
   E. Explain disconnecting means.
   F. Describe grounding for motors.

VIII. Electrical Drawings for the  Insurance Office 
   A. Interpret the electrical engineers drawing on the prints.
   B. Explain loading schedule.

IX. Requirements for Special Systems
   A. Explain multi-outlet assemblies.
   B. Describe communication systems.
   C. Explain the requirements for the computer room circuits.

X. Lamps for Lighting
   A. Differentiate between incandescent and fluorescent lighting.
   B. Distinguish the various types, sizes and forms of Low-voltage
incandescent lamps.
   C. Describe high-intensity discharge lamps (HID).
   D. Install a lighting circuit.
   E. Explain the restrictions of luminaries in clothes closets.

XI. The Electric Service installation
   A. Explain liquid-filled transformers.
   B. Install a dry-type transformer.
   C. Size the transformer overcurrent protection.
   D. Size the service entrance conductors.
   E. Provide the proper size grounding electrode conductor.

XII. Overcurrent Protection:  Fuses and Circuit Breakers
   A. Size fuses and circuit breakers for a given load.
   B. Differentiate the types of fuses.
   C. Illustrate a delta, three-phase, grounded "B" phase system.
   D. Explain series-rated breakers.
   E. Identify the characteristics of current-limiting breakers.

XIII. Use of Equipment and Conductor Short-Circuit Protection
   A. Explain conductor withstand rating.
   B. Use charts to determine a conductor's short time current rating.
   C. Explain the rules for tap conductors.

XIV. Low-Voltage Remote-Control Lighting
   A. Illustrate a low-voltage remote-control lighting circuit.
   B. Construct a wiring diagram for low-voltage lighting and explain its
function.

XV. Components of the Cooling System
   A. Explain refrigeration.
   B. Identify the evaporator.
   C. Explain the condenser.
   D. Summarize the electrical requirements for air-conditioning and
refrigeration equipment.

Methods of Evaluation of Competencies:

Evaluation of student mastery of course competencies will be accomplished using the following methods:

Chapter Test                           30% of grade
Quizzes/Homework/Class Participation   25% of grade
Lab Assignments                        25% of grade
Final Exam                             20% of grade
TOTAL                                 100%

Caveats:

1. Safety Glasses: Safety glasses with side shields are required to be worn during lab activities associated with this course. This requirement complies with accepted eye protection practices and Kansas State Law (K.S.A. 72-5207). Safety glasses must meet American National Standards Institute Z87.1 specifications. Safety glasses brought to lab and worn will be part of the lab grade. Failure to bring safety glasses to lab will result in the students being dismissed from class until they have safety glasses.
2. Note: Most prescription eyewear does not meet ANSI Z87.1. Students who wear prescription glasses must: 1) provide evidence that existing eyewear meets ANSI Z87.1, or 2) wear cover goggles (if allowable), or 3) purchase and wear ANSI Z87.1 prescription eyewear.

Disabilities:

If you are a student with a disability, and if you will be requesting accommodations, it is your responsibility to contact Access Services. Access Services will recommend any appropriate accommodations to your professor and his/her director. The professor and director will identify for you which accommodations will be arranged.

JCCC provides a range of services to allow persons with disabilities to participate in educational programs and activities. If you desire support services, contact the office of Access Services for Students With Disabilities (913) 469-8500, ext. 3521 or TDD (913) 469-3885. The Access Services office is located in the Success Center on the second floor of the Student Center.