La. Admin. Code tit. 28 § CXXVII-503

Current through Register Vol. 50, No. 9, September 20, 2024

Section CXXVII-503 - Level Two

A. Module 26201-03. Alternating Current

1. Calculate the peak and effective voltage or current values for an AC waveform.

2. Calculate the phase relationship between two AC waveforms.

3. Describe the voltage and current phase relationship in a resistive AC circuit.

4. Describe the voltage and current transients that occur in an inductive circuit.

5. Define inductive reactance and state how it is affected by frequency.

6. Describe the voltage and current transients that occur in a capacitive circuit.

7. Define capacitive reactance and state how it is affected by frequency.

8. Explain the relationship between voltage and current in the following types of AC circuits:

a. RL circuit;

b. LC circuit;

c. RC circuit;

d. RLC circuit.

9. Describe the effect that resonant frequency has on impedance and current flow in a series or parallel resonant circuit.

10. Define bandwidth and describe how it is affected by resistance in a series or parallel resonant circuit.

11. Explain the following terms as they relate to AC circuits:

a. true power;

b. reactive power;

c. apparent power;

d. power factor.

12. Explain basic transformer action.

B. Module 26202-03. Motors: Theory and Application

1. Define the following terms:

a. ampacity;

b. branch circuit;

c. circuit breaker;

d. controller;

e. duty;

f. equipment;

g. full-load amps;

h. remote control circuit;

i. interrupting rating;

j. motor circuit switch;

k. thermal protector;

l. NEMA design letter;

m. nonautomatic;

n. overcurrent;

o. overload;

p. power factor;

q. rated full-load speed;

r. rated horsepower;

s. ground fault circuit interrupter;

t. service factor;

u. thermal cutout.

2. Describe the various types of motor enclosures.

3. Describe how the rated voltage of a motor differs from the system voltage.

4. Describe the basic construction and components of a three-phase squirrel cage induction motor.

5. Explain the relationships among speed, frequency, and the number of poles in a three-phase induction motor.

6. Describe how torque is developed in an induction motor.

7. Explain how and why torque varies with rotor reactance and slip.

8. Define percent slip and speed regulation.

9. Explain how the direction of a three-phase motor is reversed.

10. Describe the component parts and operating characteristics of a three-phase wound-rotor induction motor.

11. Describe the component parts and operating characteristics of a three-phase synchronous motor.

12. Define torque, starting current, and armature reaction as they apply to DC motors.

13. Explain how the direction of rotation of a DC motor is changed.

14. Describe the design and characteristics of a DC shunt, series, and compound motor.

15. Describe dual-voltage motors and their applications.

16. Describe the methods for determining various motor connections.

17. Describe general motor protection requirements as delineated in the NEC.

C. Module 26203-03. Grounding

1. Explain the purpose of grounding and the scope of NEC Article 250.

2. Distinguish between a short circuit and a ground fault.

3. Define the NEC ground-related terms.

4. Distinguish between system grounding and equipment grounding.

5. Use NEC Table 250.66 to size the grounding electrode conductor for various AC systems.

6. Explain the NEC requirements for the installation and physical protection of grounding electrode conductors.

7. Explain the function of the grounding electrode system and determine which grounding electrodes must be used.

8. Define electrodes and explain the resistance requirements for electrodes using NEC Section 250. 56

9. Use NEC Table 250.122 to size the equipment grounding conductor for raceways and equipment.

10. Explain the function of the main bonding jumper in the grounding system and size the main bonding jumper for various applications.

11. Size the main bonding jumper for a service utilizing multiple service disconnecting means.

12. Explain the NEC requirements for bonding of enclosures and equipment.

13. Explain the NEC requirements for grounding of enclosures and equipment.

14. Explain effectively grounded and its importance in clearing ground faults and short circuits.

15. Explain the purposes of the grounded conductor (neutral) in the operation of overcurrent devices.

16. Explain the NEC requirements for grounding separately-derived systems, including transformers and generators.

17. Explain the NEC requirements for grounding at more than one building.

18. Explain the NEC grounding requirements for systems over 600 volts.

D. Module 26204-03. Conduit Bending

1. Describe the process of conduit bending using power tools.

2. Identify all parts of popular electric and hydraulic benders.

3. Avoid excessive waste when working with conduit systems.

4. Bend offsets, kicks, saddles, segmented, and parallel bends.

5. Explain the requirements of the NEC for bending conduit.

6. Compute the radius, degrees in bend, developed length, and gain for conduit up to 6 inches.

7. Explain how to correct damaged conduit and modify existing bends.

E. Module 26205-03. Boxes and Fittings

1. Describe the different types of nonmetallic and metallic boxes.

2. Understand the NEC requirements for box fill.

3. Calculate the required box size for any number and size of conductors.

4. Explain the NEC regulations for volume required per conductor in outlet boxes.

5. Properly locate, install, and support boxes of all types.

6. Describe the NEC regulations governing pull and junction boxes.

7. Explain the radius rule when installing conductors in pull boxes.

8. Understand the NEC requirements for boxes supporting lighting fixtures.

9. Describe the purpose of conduit bodies and Type FS boxes.

10. Install the different types of fittings used in conjunction with boxes.

11. Describe the installation rules for installing boxes and fittings in hazardous areas.

12. Explain how boxes and fittings are selected and installed.

13. Describe the various types of box supports.

F. Module 26206-03. Conductor Installations

1. Describe the various methods of installing conductors in conduit.

2. Plan and set up for a cable pull.

3. Understand the importance of selecting the proper location for cable pulls.

4. Describe how cable reels are transported to the pulling site.

5. Set up reel stands and spindles for a wire-pulling installation.

6. Explain how mandrels, swabs, and brushes are used to prepare conduit for conductors.

7. Properly install a pull line for a cable-pulling operation.

8. Explain the operation of power fish tape systems.

9. Prepare the ends of conductors for pulling.

10. Describe the types of cable pullers.

11. Describe the process of high-force cable pulling.

12. Explain how to support conductors in vertical conduit runs.

13. Describe the installation of cables in cable trays.

14. Explain the importance of communication during a cable-pulling operation.

15. Calculate the probable stress or tension in cable pulls.

G. Module 26207-03. Cable Tray

1. Describe the components that make up a cable tray assembly.

2. Explain the methods used to hang and secure cable tray.

3. Describe how cable enters and exits cable tray.

4. Select the proper cable tray fitting for the situation.

5. Explain the NEMA standards for cable tray installations.

6. Explain the NEC requirements for cable tray installations.

7. Select the required fittings to ensure equipment grounding continuity in cable tray systems.

8. Interpret electrical working drawings showing cable tray fittings.

9. Size cable tray for the number and type of conductors contained in the system.

10. Select rollers and sheaves for pulling cable in specific cable tray situations.

11. Designate the required locations of rollers and sheaves for a specific cable pull.

H. Module 26208-03. Conductor Terminations and Splices

1. Describe how to make a good conductor termination.

2. Prepare cable ends for terminations and splices.

3. Install lugs and connectors onto conductors.

4. Train cable at termination points.

5. Explain the role of the NEC in making cable terminations and splices.

6. Explain why mechanical stress should be avoided at cable termination points.

7. Describe the importance of using proper bolt torque when bolting lugs onto busbars.

8. Describe crimping techniques.

9. Select the proper lug or connector for the job.

10. Describe splicing techniques.

11. Explain how to use hand and power crimping tools.

I. Module 26209-03. Installation of Electric Services

1. Describe various types of electric services for commercial and industrial installations.

2. Read electrical blueprints and diagrams describing service installations.

3. Calculate and select service-entrance equipment.

4. Explain the role of the NEC in service installations.

5. Install main disconnect switches, panelboards, and overcurrent protection devices.

6. Identify the circuit loads, number of circuits required, and installation requirements for distribution panels.

7. Explain the types and purposes of service grounding.

8. Explain the purpose and required location(s) of ground fault circuit interrupters.

9. Describe single-phase service connections.

10. Describe both wye- and delta-connected three-phase services.

J. Module 26210-03. Circuit Breakers and Fuses

1. Explain the necessity of overcurrent protection devices in electrical circuits.

2. Define the terms associated with fuses and circuit breakers.

3. Describe the operation of a circuit breaker.

4. Select the most suitable overcurrent device for the application.

5. Explain the role of the NEC in specifying overcurrent devices.

6. Describe the operation of single-element and time-delay fuses.

7. Explain how ground fault circuit interrupters (GFCIs) can save lives.

8. Calculate short circuit currents.

9. Describe troubleshooting and maintenance techniques for overcurrent devices.

K. Module 26211-03. Contactors and Relays

1. Describe the operating principles of contactors and relays.

2. Select contactors and relays for use in specific electrical systems.

3. Explain how mechanical contactors operate.

4. Explain how solid-state contactors operate.

5. Install contactors and relays according to the NEC requirements.

6. Select and install contactors and relays for lighting control.

7. Read wiring diagrams involving contactors and relays.

8. Describe how overload relays operate.

9. Connect a simple control circuit.

10. Test control circuits.

L. Module 26212-03. Electric Lighting

1. Explain how the human eye works.

2. Describe the characteristics of light.

3. Recognize the different kinds of lamps and explain the advantages and disadvantages of each type:

a. incandescent;

b. fluorescent;

c. halogen;

d. high-intensity discharge (HID).

4. Properly select and install lamps into lighting fixtures.

5. Recognize and install various types of lighting fixtures:

a. surface-mounted;

b. suspended;

c. recessed;

d. track-mounted.

La. Admin. Code tit. 28, § CXXVII-503

Promulgated by the Board of Elementary and Secondary Education, LR 32:1208 (July 2006).

AUTHORITY NOTE: Promulgated in accordance with R.S. 17:6(A)(10).