Description:

Upon successful completion of this course, the student should be able to use the current National Electrical Code to do calculations involving loads, lighting and circuit sizing. The course will cover typical load calculations used in both residential and commercial settings. The student should also be able to interpret and apply the National Electrical Code rules to special wiring systems including Hazardous Locations, Elevators, Remote-control circuits and Fire Alarm systems. 3 hrs. lecture/wk.

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. Demonstrate an understanding for simple and complex electrical circuits using basic electrician’s math, commonly used electrical terms and Ohm’s Law.
2. Explain the rules for classified Hazardous Locations and Intrinsically safe circuits, NEC articles 500 through 504.
3. Manipulate Single-Phase and Three-Phase Electrical and Power Formulas to solve problems found in the current National Electrical Code for dwellings (both one-family and multi-family), commercial and industrial buildings.
4. Calculate the size of electrical raceways containing different gauge conductors and solve for outlet box fill, pull box sizing, voltage drop and circuit impedance.
5. Solve problems in over-current protection (branch circuits, feeders and services) using fuses and inverse-time circuit breakers.
6. Solve problems in calculating loads (lighting, receptacle and appliance) in branch circuits, feeders and services.
7. Calculate the conductor size, thermal overload, branch circuit over-current protection device, feeder conductor size and feeder over-current protection device for single-phase and three-phase motors.
8. Identify the rules for the electrical requirements of elevators in a commercial building, from NEC Article 620.
9. Solve problems in calculating Service Entrance Loads, the number of services permitted for a commercial building, service-drop heights, locating the meter base, and supporting service raceways.
10. Solve problems using electrical formulas and the current National Electrical Code to determine Transformer installations for Electrical Services.
11. Identify the rules for class 1, 2, and 3 remote-control circuits including fire alarms; NEC Articles 725 and 760 .

Content Outline & Competencies:

I. Electrician's Math
   A. Calculate a decimal from a fraction.
   B. Define the term kilo.
   C. Calculate percentages using a decimal.
   D. Use a multiplier in a calculation.
   E. Explain a reciprocal.
   F. Find the square of a number.
   G. Calculate the square root of a number.
   H. Explain the practice of rounding off.
   I. Transpose a formula.

II. Basic Electrical Formulas
   A. Explain the function of an electrical circuit.
   B. Define conductance and resistance.
   C. Calculate Ohm's Law problems.
   D. Explain the PIE circle formula.
   E. Calculate power changes in watts.
   F. Describe the use of electrical testing meters.

III. Electrical Circuits
   A. Describe a series circuit.
   B. Summarize the rules that apply to series circuits.
   C. Explain a parallel circuit.
   D. Calculate a parallel resistance.
   E. Summarize the rules that apply to parallel circuits.
   F. Identify a series-parallel circuit.
   G. Calculate the resistance of a series-parallel circuit.
   H. Define a multiwire circuit.
   I. Calculate a neutral current.
   J. Explain the dangers of multiwire circuits.

IV. Alternating Current Fundamentals
   A. Describe current flow.
   B. Define alternating current.
   C. Graph an AC wave form.
   D. Explain armature turning frequency.
   E. Explain phase differences in degrees.
   F. Define induction.
   G. Define conductor impedance.
   H. Explain how to charge a capacitor.
   I. Describe the various purposes and function of capacitors in a
circuit.

V. Hazardous Locations  
   A.Define the three types of classified hazardous locations.
   B.Explain the difference between a Division 1 and a Division 2
condition in the hazardous locations. 
   C.Explain the material groups (A through G) used in hazardous locations
and what hazard class they belong to.
   D.Describe the wiring methods required for each class of hazardous
location (explosion proof vs. ignition proof).
   E.Explain the use of conduit seals.
   F.Explain the NEC rules for grounding and bonding in hazardous
locations.

VI. Motors and Transformers
   A. Explain motor speed control.
   B. Describe how to reverse rotation on a direct current motor.
   C. Describe how to reverse rotation on an alternating current motor.
   D. Calculate the volt-amperes for a motor.
   E. Explain watts per horsepower.
   F. Define nameplate amperes.
   G. Differentiate primary winding versus secondary winding  on a
transformer.
   H. Differentiate primary voltage versus secondary voltage on a
transformer.
   I. Define power losses.
   J. Describe turns ratio.
   K. Explain transformer kVA rating.
   L. Calculate the current on a transformer using kVA.

VII. Raceway, Outlet Box and Junction Box Calculations
   A. Explain the use of raceway fill using Chapter 9 of the NEC.
   B. Calculate raceway and nipple fill.
   C. Calculate fill for an existing raceway.
   D. Size an outlet box.
   E. Explain conductor equivalents.
   F. Make a junction box size calculation based on a straight pull.
   G. Make a junction box size calculation based on an angle pull.
   H. Explain conduit body sizing.

VIII. Conductor Sizing and Protection
   A. Describe conductor insulation properties.
   B. Calculate the allowable ampacity for a given conductor.
   C. Define terminal ratings from NEC 110-14 (C).
   D. Calculate the voltage drop on a conductor.
   E. Describe overcurrent protection from NEC Article 240.
   F. Define conductor ampacity.
   G. Explain ambient temperature de-rating factor.
   H. Explain conductor bunching de-rating factor, Note 8, of Table
310-16.
   I. Calculate the ampacity of a conductor using all derating factors.

IX. Motor Calculations
   A. Size a motor branch circuit conductor.
   B. Define motor overcurrent protection.
   C. Explain overload protection, NEC Section 430-32 (A).
   D. Define branch circuit short-circuit ground-fault protection.
   E. Size a feeder conductor.
   F. Size the feeder overcurrent protection.
   G. Summarize the six steps for NEC motor calculations.

X. Elevators, NEC Article 620
   A. Define the NEC rules for branch circuit wiring in machine room
spaces.
   B. Explain the NEC rules for wiring a hoist-way pit.
   C. Describe the requirements for the elevator disconnecting means.
   D. Explain the requirements for Ground Fault Circuit Interruption for
personnel in an elevator room.

XI. One-Family Dwelling-Unit Load Calculations
   A. Explain the general requirements  for a load calculation.
   B. Explain how a fraction of an ampere is used in a calculation.
   C. Calculate the demand for an appliance circuit.
   D. Calculate the demand for cooking equipment.
   E. Explain the demand rules for a laundry receptacle.
   F. Explain the number of circuits required in a dwelling.
   G. Calculate a service demand load using the standard method.
   H. Calculate a service demand load using the optional method.
   I. Calculate the neutral load for a service.

XII. Multifamily Dwelling-Unit Load Calculations
   A. Calculate the service demand load using the standard method.
   B. Calculate the service demand load using the optional method.
   C. Summarize the requirements for multifamily dwelling-unit load
calculations.

XIII. Commercial Load Calculations
   A. Explain air conditioning versus heating demands.
   B. Calculate the demand for multiple  commercial dryers.
   C. Explain the demand factors for kitchen equipment.
   D. Calculate the receptacle VA load of a commercial building.
   E. Calculate the general lighting load for a bank.
   F. Size the neutral conductor for a commercial service.
   G. Calculate the service demand load for a restaurant.
   H. Calculate the service demand load for a school.

XIV. Class 1, 2, and 3 Remote-Control Circuits, NEC Article 725 
   A. Define the circuit requirements for Class 1, 2, and 3 remote-control
circuits.
   B. Distinguish the difference between Class 1 power sources and Class 2
and 3 power sources.
   C. Explain the NEC rules for separation from other power systems.
   D. Explain the listing and marking requirements for Class 2 and Class 3
cables.
   E. Explain the NEC rules for Fire Alarm circuits, NEC Article 760.
   F. Describe the requirements for Non-power-limited Fire Alarm
circuits,(NPLFA).
   G. Describe the requirements for Power-limited Fire Alarm circuits,
(PLFA).

Methods of Evaluation of Competencies:

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

Quizzes and Examinations      40% of grade
Homework/Class Participation  40% of grade
Final Exam                    20% of grade
TOTAL                        100%

90% +	   = A
80 - 89 %  = B
70 - 79 %  = C
60 - 69 %  = D
Below 60 % = F

Caveats: NONE

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.