La. Admin. Code tit. 28 § CXXVII-505

Current through Register Vol. 50, No. 11, November 20, 2024

Section CXXVII-505 - Level Three

A. Module 26301-02. Load Calculators- Branch and Feeder Circuits

1. Calculate loads for single-phase and three-phase branch circuits.

2. Size branch circuit overcurrent protection devices (circuit breakers and fuses) for noncontinuous duty and continuous duty circuits.

3. Apply derating factors to size branch circuits.

4. Calculate ampacity for single-phase and three-phase loads.

5. Use load calculations to determine branch circuit conductor sizes.

6. Use NEC Table 220-19 to calculate residential cooking equipment loads.

7. Select branch circuit conductors and overcurrent protection devices for:

a. electric heat;

b. air conditioning equipment;

c. motors; and

d. welders.

B. Module 26302-02. Conductor Selection and Calculations

1. Select electrical conductors for specific applications.

2. Calculate voltage drop in both single-phase and three-phase applications.

3. Apply NEC regulations governing conductors to a specific application.

4. Calculate and apply NEC tap rules to a specific application.

5. Size conductors for the load.

6. Derate conductors for fill, temperature, and voltage drop.

7. Select conductors for various temperature ranges and atmospheres.

C. Module 26303-02. Overcurrent Protection

1. Apply the key NEC requirements regarding overcurrent protection.

2. Check specific applications for conformance to NEC sections that cover short circuit current, fault currents, interrupting ratings, and other sections relating to overcurrent protection.

3. Determine let-through current values (peak and rms) when current-limiting overcurrent devices are used.

4. Select and size overcurrent.

D. Module 26304-02. Raceway, Box, and Fitting Fill Requirements

1. Size raceways according to conductor fill and NEC installation requirements.

2. Size outlet boxes according to NEC installation requirements.

3. Size and select pull and junction boxes according to NEC installation requirements.

4. Calculate conduit fill using a percentage of the trade size conduit inside diameter (ID).

5. Calculate the required bending radius in boxes and cabinets.

E. Module 26305-02. Wiring Devices

1. Select wiring devices according to the National Electrical Manufacturers' Association (NEMA) classifications.

2. Size wiring devices in accordance with NEC requirements.

3. Discuss the NEMA enclosure classifications.

4. Follow NEC regulations governing the installation of wiring devices.

5. Explain the types and purposes of grounding wiring devices.

6. Determine the maximum load allowed on specific wiring devices.

F. Module 26306-02. Distribution Equipment

1. Describe the purpose of switchgear.

2. Describe the four general classifications of circuit breakers and list the major circuit breaker ratings.

3. Describe switchgear construction, metering layouts, wiring requirements, and maintenance.

4. List NEC requirements pertaining to switchgear.

5. Describe the visual and mechanical inspections and electrical tests associated with low-voltage and medium-voltage cables, metal-enclosed busways, and metering and instrumentation.

6. Describe a ground fault relay system and explain how to test it.

G. Module 26307-02. Distribution System Transformers

1. Describe transformer operation.

2. Explain the principle of mutual induction.

3. Describe the operating characteristics of various types of transformers.

4. Connect a multi-tap transformer for the required secondary voltage.

5. Explain NEC requirements governing the installation of transformers.

6. Compute transformer sizes for various applications.

7. Explain types and purposes of grounding transformers.

8. Connect a control transformer for a given application.

9. Size the maximum load allowed on open delta systems.

10. Describe how current transformers are used in conjunction with watt-hour meters.

11. Apply capacitors and rectifiers to practical applications.

12. Calculate the power factor of any given electrical circuit.

H. Module 26308-02. Lamps, Ballasts, and Components

1. Recognize incandescent, fluorescent, and high-intensity discharge (HID) lamps and describe how each type of lamp operates.

2. Recognize ballasts and describe their purpose for use in fluorescent and HID lighting fixtures.

3. Explain the relationship of Kelvin temperature to the color of light produced by a lamp.

4. Recognize basic occupancy sensors, photoelectric sensors, and timers used to control lighting circuits and describe how each device operates.

5. Use troubleshooting checklists to troubleshoot fluorescent and HID lamps and lighting fixtures.

I. Module 26309-02. Motor Calculations

1. Size branch circuits and feeders for electric motors.

2. Size and select overcurrent protective devices for motors.

3. Size and select overload relays for electric motors.

4. Size and select devices to improve the power factor at motor locations.

5. Size motor short circuit protectors.

6. Size multi-motor branch circuits.

7. Size motor disconnects.

J. Module 26310-02. Motor Maintenance, Part One

1. Properly store motors and generators.

2. Test motors and generators.

3. Make connections for specific types of motors and generators.

4. Clean open-frame motors.

5. Lubricate motors that require this type of maintenance.

6. Collect and record motor data.

7. Select tools for motor maintenance.

8. Select instruments for motor testing.

K. Module 26311-02. Motor Controls

1. Identify contactors and relays both physically and schematically and describe their operating principles.

2. Identify pilot devices both physically and schematically and describe their operating principles.

3. Interpret motor control wiring, connection, and ladder diagrams.

4. Select and size contactors and relays for use in specific electrical motor control systems.

5. Select and size pilot devices for use in specific electrical motor control systems.

6. Connect motor controllers for specific applications according to NEC requirements.

L. Module 26312-02. Hazardous Locations

1. Define the various classifications of hazardous locations.

2. Describe the wiring methods permitted for branch circuits and feeders in specific hazardous locations.

3. Select seals and drains for specific hazardous locations.

4. Select wiring methods for Class I, Class II, and Class III hazardous locations.

5. Follow NEC requirements for installing explosionproof fittings in specific hazardous locations.

La. Admin. Code tit. 28, § CXXVII-505

Promulgated by the Board of Elementary and Secondary Education, LR 32:1210 (July 2006).

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