Load Calculations – Branch and Feeder Circuits

Load Calculations – Branch and Feeder Circuits
Load Calculations – Branch
and Feeder Circuits
Module 26301-11
Annotated Instructor’s Guide
Module Overview
This module introduces the load calculations and National Electrical Code® (NEC®) requirements for
branch and feeder circuits.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; and Electrical Level Two.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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 220.55 to calculate residential cooking equipment loads.
7. Select branch circuit conductors and overcurrent protection devices for electric heat, air conditioning
equipment, motors, and welders.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-2577133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Calculator
Module Examinations*
*Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased
the perfect-bound version of this title, download these materials from the IRC using your access code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for this Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 171⁄2 hours are suggested to cover Load Calculations – Branch and
Feeder Circuits. You will need to adjust the time required for hands-on activity and testing based on your
class size and resources.
Topic
Planned Time
Session I. Introduction; Branch Circuit Ratings; Derating; Calculating Branch
Circuit Ampacity
A.Introduction
B. Branch Circuit Ratings
C. Derating
1. Temperature Derating
2. Voltage Drop Derating for Single-Phase Circuits
3. Voltage Drop Derating for Three-Phase Circuits
D.Calculating Branch Circuit Ampacity
Session II. Lighting Loads; Receptacle Loads; Multi-Outlet Assemblies
A.Lighting Loads
1. Recessed Lighting
2. Heavy-Duty Lamp Holder Outlets
B. Receptacle Loads
C. Multi-Outlet Assemblies
Session III. Show Window Loads; Sign Load
A.Show Window Loads
B. Sign Load
Session IV. Residential Branch Circuits; Commercial Kitchen Equipment
A.Residential Branch Circuits
1. Small Appliance Load
2. Laundry Circuit
3. Dryers
4. Cooking Appliances
B. Commercial Kitchen Equipment
Session V. Water Heaters; Electric Heating Loads; Air Conditioning Loads
A.Water Heaters
B. Electric Heating Loads
C. Air Conditioning Loads
Session VI. Motor Loads; Welders
A.Motor Loads
B. Welders
Session VII. Review and Testing
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Topic
A.Module Review
B. Module Examination
1. Trainees must score 70 percent or higher to receive recognition from the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
Planned Time
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Conductor Selection and Calculations Module 26302-11
Annotated Instructor’s Guide
Module Overview
This module introduces the procedures for conductor selection and calculations using various tables in
the National Electrical Code® (NEC®).
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Module 26301-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
1. Select electrical conductors for specific applications.
2. Calculate voltage drop in both single-phase and three-phase applications.
3. Apply National Electrical Code® (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.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
One length each of various solid and stranded
conductors
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute break
during the session. Approximately 15 hours are suggested to cover Conductor Selection and Calculations.
You will need to adjust the time required for hands-on activity and testing based on your class size and
resources.
Topic
Session I. Introduction; Compact Conductors
A.Introduction
B. Compact Conductors
Session II. Conductor Applications
A.Conductor Applications
1. Branch Circuits
2. Conductor Protection
3. Location of Overcurrent Protection in Circuits
Session III. Properties of Conductors
A.Properties of Conductors
1. Identifying Conductors
2. Color Coding
3. Changing Colors
Session IV. Voltage Drop
A.Voltage Drop
1. Wire Sizes Based on Resistance
2. Circular Mil-Unit of Conductor Area
3. Conversion of Square Mils to Circular Mils
4. Resistance of Conductors
5. Resistance of Copper per Mil Foot
Session V. Voltage Drop Equations
A.Voltage Drop Equations
1. Equations for Voltage Drop Using Conductor Area or Conductor Resistance
2. Use of Voltage Drop Equations
3. Miscellaneous Voltage Drop Equations
Session VI. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from the
NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
Planned Time
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Practical Applications of Lighting
Annotated Instructor’s Guide
Module 26303-11
Module Overview
This module builds on the information and lighting principles previously covered in the Electrical Level
Two module, Electric Lighting. It describes specific applications for the different designs of incandescent,
fluorescent, LED, induction, and HID lighting fixtures. It also provides an overview of the major applications and requirements for lighting systems, as well as an introduction to special wiring systems and
dimming systems.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11 and
26302-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
1. Explain how the lighting terms lumen, candlepower, and footcandle relate to one another.
2. Classify lighting fixtures by type and application.
3. Identify the general lighting pattern produced by each type of fixture.
4. Identify the lighting requirements associated with lighting systems used in selected applications such
as office buildings, schools, theaters, hazardous areas, etc.
5. Identify various dimming systems and their components.
6. Use manufacturers’ lighting fixture catalogs to select the appropriate lighting fixtures for specific lighting applications.
Performance Tasks
Under the supervision of the instructor, the trainee should be able to do the following:
1 Using manufacturers’ catalogs, select the appropriate lighting fixtures for specific lighting situations.
2 While touring selected structures to observe their lighting systems:
• Identify the various types of lighting fixtures used.
• Explain the specific purpose(s) served by the different fixtures.
• Identify the lighting system class of service.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Light meter
Examples of lighting fixture manufacturers’ catalogs
Assortment of incandescent, halogen, fluorescent,
and HID lighting fixtures, including:
• Surface-mounted
• Recessed
• Suspended
• Track-mounted
Assortment of incandescent, fluorescent, and HID
dimming controls and ballasts
Module Examinations*
Performance Profile Sheets*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
Lighting Handbook. New York, NY: Illuminating Engineering Society of North America (IESNA), 2000.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for this Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 2½ hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 12½ hours are suggested to cover Practical Applications of
Lighting. You will need to adjust the time required for hands-on activity and testing based on your class
size and resources. Because laboratories often correspond to Performance Tasks, the proficiency of the
trainees may be noted during these exercises for Performance Testing purposes.
Topic
Planned Time
Session I. Introduction; Lumens, Candlepower; Footcandles; Classification of Lighting Fixtures
A.Introduction
B. Lumens, Candlepower, and Footcandles
C. Classification of Lighting Fixtures
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_____________ Session II. Practical Applications of Lighting Fixtures
A.Practical Applications of Lighting Fixtures
1. Incandescent Lighting Fixtures
2. Fluorescent Lighting Fixtures
3. High-Intensity Discharge (HID) Lighting Fixtures
4. Outdoor Lighting Fixtures
5. Emergency and Exit Lighting Fixtures
6. Induction Lighting Systems
7. Light-Emitting Diode (LED) Technology
8. Hazardous and Adverse Location Lighting Fixtures
9. Vandal-Resistant Lighting Fixtures
10. Lighting Fixture Illumination Control
B. PT/Laboratory
Have the trainees use manufacturers’ catalogs to select the
appropriate lighting fixtures for specific lighting situations. This laboratory
corresponds to Performance Task 1.
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Topic
Planned Time
Session III. Applications of Lighting
A.Applications of Lighting
1. Office Buildings
2. Schools
3. Retail Store Merchandise Areas
4. Health Care Facilities
5. Theaters and Auditoriums
6. Industrial Locations
7. Outdoor Lighting
8. Sports Lighting
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_____________ Session IV. Special-Purpose Wiring Systems Used for Lighting; Dimming
A.Special-Purpose Wiring Systems Used for Lighting
1. Manufactured System Wiring
2. Lighting Trolley Busways
3. Strut-Type Channel Systems
B. Dimming
1. Incandescent Lamps
2. Fluorescent Lamps
3. HID Lamps
4. Dimmer Control Racks
Session V. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit
the results to the Training Program Sponsor.
C. Performance Testing
1.Trainees must perform each task to the satisfaction of the instructor to
receive recognition from the NCCER.
2.Record the testing results on Training Report Form 200, and submit
the results to the Training Program Sponsor.
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Hazardous Locations
Module 26304-11
Annotated Instructor’s Guide
Module Overview This module introduces the National Electrical Code® (NEC®) requirements and installation procedures
related to electrical equipment installed in hazardous locations.
Prerequisites Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26303-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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 National Electrical Code® (NEC®) requirements for installing explosionproof fittings in specific
hazardous locations.
Performance Tasks Under the supervision of the instructor, the trainee should be able to do the following:
1. Using two rigid metal conduit nipples, a sealing fitting, three pieces of No. 12 THHN conductors, and
a packing fiber/sealing kit, perform the following operations:
• Secure one conduit nipple in each end of the seal.
• Make sure the required amount of threads are engaged.
• Pull the three THHN conductors through the nipples and seal so that about 6" is protruding from
each nipple.
• Pack the fiber as per the instructions furnished with the sealing kit.
• Mix the sealing compound.
• Position the unit in the required location and pour in the sealing compound.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Sealoff fittings, packing fiber, and sealing
compound
Short conduit nipples
No. 12 THHN conductors
Various types of explosionproof fittings
Various types of sealing fittings used in hazardous
locations, including those with drains
Portable conduit threader
Module Examinations*
Performance Profile Sheets*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
Code Digest. Latest Edition. Syracuse, NY: Cooper Crouse-Hinds.
National Electrical Code® Handbook. Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 15 hours are suggested to cover Hazardous Locations. You will
need to adjust the time required for hands-on activity and testing based on your class size and resources.
Because laboratories often correspond to Performance Tasks, the proficiency of the trainees may be noted
during these exercises for Performance Testing purposes.
Topic
Session I. Introduction
A.Introduction
1. Class I Locations
2. Class II Locations
3. Class III Locations
4. Applications
Session II. Prevention of External Ignition/Explosion
A.Prevention of External Ignition/Explosion
1. Sources of Ignition
2. Combustion Principles
Session III. Explosionproof Equipment
A.Explosionproof Equipment
1. Intrinsically Safe Equipment
2. Explosionproof Conduit and Fittings
3. Seals and Drains
Planned Time
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Session IV. PT/Laboratory
A.PT/Laboratory
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Have the trainees practice installing sealoff fittings and pouring seals. Note
the proficiency of each trainee. This laboratory corresponds to Performance Task 1.
Topic
Session V. Garages and Similar Locations; Airport Hangars; Hospitals; Petrochemical Hazardous Locations; Manufacturers’ Data
A. Garages and Similar Locations
B. Airport Hangars
C. Hospitals
D.Petrochemical Hazardous Locations
E. Manufacturers’ Data
Session VI. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
C. Performance Testing
1.Trainees must perform each task to the satisfaction of the instructor to
receive recognition from the NCCER.
2.Record the testing results on Training Report Form 200, and submit
the results to the Training Program Sponsor.
Planned Time
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Overcurrent Protection
Annotated Instructor’s Guide
Module 26305-11
Module Overview
This module covers the procedures used when sizing and selecting overcurrent protection, along with
the applicable National Electrical Code® (NEC®) requirements.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26304-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
1. Apply the key National Electrical Code® (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 protection for specific applications.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Various types of circuit breakers
Various types of fuses, including electronic fuses
Sample fuse blocks and holders with nonrejection
bases
Sample fuse blocks and holders with rejection
clips that accept only Class R fuses
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for this Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 25 hours are suggested to cover Overcurrent Protection. You will
need to adjust the time required for hands-on activity and testing based on your class size and resources.
Topic
Session I. Introduction
A.Introduction
1. Fault Currents
Session II. Fuses
A.Fuses
1. Types of Fuses
2. Voltage Rating
3. Ampere Rating
4. Interrupting Rating
5. Selective Coordination
6. Current Limitation
Planned Time
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Session III. Operating Principles of Fuses
A.Operating Principles of Fuses
1. Nontime-Delay Fuses
2. Dual-Element, Time-Delay Fuses
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Session IV. UL Fuse Classes
A.UL Fuse Classes
1. Branch Circuit Listed Fuses
2. Medium-Voltage Fuses
3. Current-Limiting Fuses
4. Fuses for Selective Coordination
5. Fuse Time-Current Curves
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Session V. Motor Overload and Short Circuit Protection A.Motor Overload and Short Circuit Protection
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Session VI. Circuit Breakers
A.Circuit Breakers
1. Interrupting Capacity Rating
Session VII. Circuit Protection
A.Circuit Protection
1. Lighting/Appliance Branch Circuits
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Topic
Session VIII. Short Circuit Calculations
A.Short Circuit Calculations
1. Basic Short Circuit Calculation Procedure
2. Practical Application
3. Peak Let-Through Charts
Session IX. Troubleshooting and Testing Circuit Breakers and Fuses
A.Troubleshooting and Testing Circuit Breakers and Fuses
1. Circuit Breakers
2. Fuses
Session X. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
Planned Time
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Distribution Equipment
Annotated Instructor’s Guide
Module 26306-11
Module Overview
This module introduces the methods and procedures related to distribution equipment, including
grounding, switchboard testing and maintenance, ground fault sensing, and interpreting electrical
drawings.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26305-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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 National Electrical Code® (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.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Manufacturer’s literature for various types of
distribution equipment
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 121⁄2 hours are suggested to cover Distribution Equipment. You
will need to adjust the time required for hands-on activity and testing based on your class size and
resources.
Topic
Planned Time
Session I. Introduction; Voltage Classifications; Switchboards; Switchgear
A.Introduction
B. Voltage Classifications
C. Switchboards
D.Switchgear
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Session II. Switchboard Testing and Maintenance; NEC® Requirements;
Ground Faults
A.Switchboard Testing and Maintenance
B. NEC® Requirements
C. Ground Faults
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Session III. HVL Switches; Bolted Pressure Switches; Transformers
A.HVL Switches
B. Bolted Pressure Switches
C. Transformers
Session IV. Instrument Transformers; Circuit Breakers; Electrical Drawing Identification
A.Instrument Transformers
B. Circuit Breakers
C. Electrical Drawing Identification
Session V. Electrical Prints; Manufacturer Drawings; Panelboards; Review and Testing A.Electrical Prints
B. Manufacturer Drawings
C. Panelboards
D.Module Review
E. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
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Transformers
Annotated Instructor’s Guide
Module 26307-11
Module Overview
This module introduces the methods and procedures used in selecting and wiring transformers.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26306-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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 National Electrical Code® (NEC®) requirements governing the installation of transformers.
6. Compute transformer sizes for various applications.
7. Connect a control transformer for a given application.
8. Describe how current transformers are used in conjunction with watt-hour meters.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Samples of various types of transformers
Samples of transformer cores, including:
Mitered
Butt
Wound
Iron filings
Multi-tap control transformers
Control cable
Volt-ohm-milliammeter (VOM)
Tools necessary for making transformer wiring
connections
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resosurce material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 121⁄2 hours are suggested to cover Transformers. You will need
to adjust the time required for hands-on activity and testing based on your class size and resources.
Topic
Planned Time
Session I. Introduction; Transformer Basics; Transformer Construction; Transformer Taps
A.Introduction
B. Transformer Basics
1. Inductive
2. Magnetic Flux
C. Transformer Construction
1. Cores
D.Transformer Taps
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Session II. Basic Transformer Connections; Autotransformers
A.Basic Transformer Connections
1. Single Phase
2. Three-Phase
3. Parallel-Operated Transformers
B. Autotransformers
_____________
_____________
_____________
_____________
_____________
Session III. Transformer Data; Control Transformers; NEC® Requirements
A.Transformer Data
B. Control Transformers
C. NEC® Requirements
1. Overcurrent Protection
2. Grounding
Session IV. Power Factor; Vectors
A.Power Factor
B. Vectors
Session V. Troubleshooting; Transformer Maintenance
A.Troubleshooting
B. Transformer Maintenance
Session VI. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Commercial Electrical Services
Annotated Instructor’s Guide
Module 26308-11
Module Overview
This module covers the applicable National Electrical Code® (NEC®) requirements and general installation
considerations for commercial electrical services.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26307-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
1. Describe various types of electric services for commercial and industrial installations.
2. Read electrical diagrams describing service installations.
3. Select service-entrance equipment for various applications.
4. Explain the role of the National Electrical Code® in service installations.
5. Install main disconnect switches, panelboards, and overcurrent protection devices.
6. Identify the National Electrical Code® requirements and purposes of service grounding.
7. Describe single-phase service connections.
8. Describe both wye- and delta-connected three-phase services.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Samples of common service components,
including:
Service disconnect
Meter
Transformers
Wireways
Gutters
Weatherhead and service mast
Panelboards
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 2 1⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 10 hours are suggested to cover Commercial Electrical Services.
You will need to adjust the time required for hands-on activity and testing based on your class size and
resources.
Topic
Planned Time
Session I. Introduction; Drawings and Specifications; General Installation Considerations
A.Introduction
B. Drawings and Specifications
C. General Installation Considerations
_____________
_____________
_____________
Session II. Service Components
A.Service Components
1. Service Disconnecting Means
2. Metering
3. Current Transformers
4. Metal Wireways
5. Bussed Gutters
6. Weatherhead and Service Mast
7. Panelboards
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Session III. NEC® Requirements; Typical Installations
A.NEC® Requirements
B. Typical Installations
Session IV. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
_____________
_____________
_____________
_____________
Motor Calculations
Annotated Instructor’s Guide
Module 26309-11
Module Overview
This module introduces the calculations used to size motor branch and feeder circuits, overcurrent protection, and disconnects.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26308-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Motor short circuit protector
Devices used to provide motor overload
protection, including:
Overload relays
Fuses
Circuit breakers
Various types of fuses, including:
Nontime-delay
Dual-element, time-delay fuses
Various types of disassembled motors, including:
Squirrel cage
Wound-rotor
Synchronous
Various types of circuit breakers
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 2 ½ hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 12 ½ hours are suggested to cover Motor Calculations. You will
need to adjust the time required for hands-on activity and testing based on your class size and resources.
Topic
Session I. Introduction; Motor Basics
A.Introduction
B. Motor Basics
1. Stator Windings
2. Special Connections
Session II. Calculating Motor Circuit Conductors
A.Calculating Motor Circuit Conductors
1. Wound-Rotor Motors
2. Conductors for DC Motors
3. Conductors for Miscellaneous Motor Applications
Session III. Motor Protective Devices; Circuit Breakers
A.Motor Protective Devices
B. Circuit Breakers
1. Application of MCPs
2. Motor Short Circuit Protectors
Session IV. Multi-Motor Branch Circuits; Equipment Grounding Conductors for Motor Feeder and Branch Circuits; Power Factor Correction at Motor Terminals
A.Multi-Motor Branch Circuits
B. Equipment Grounding Conductors for Motor Feeder and Branch Circuits
C. Power Factor Correction at Motor Terminals
Session V. Review and Testing
A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
Planned Time
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Voice, Data, and Video
Annotated Instructor’s Guide
Module 26310-11
Module Overview
This module covers the procedures used when selecting, installing, and maintaining cable systems for
voice, data, and video systems.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26309-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
1. Define the different categories for voice-data-video (VDV) cabling systems.
2. Install raceways, boxes, and enclosures for VDV systems.
3. Interpret and apply NEC® requirements for installing and grounding VDV systems.
4. Explain the requirements for firestopping.
Performance Tasks
This is a knowledge-based module. There are no Performance Tasks.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Samples of:
Fiber-optic cable
Coaxial cable
UTP cable
Coax F-type connector terminations
Innerduct
Various types of coax stripping tools
Module Examinations*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
Cisco Home Technology Integration Fundamentals and Certification, 2004. Engelwood, CO: Upper Saddle
River, NJ: Pearson Education, Inc.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
The Cabling Handbook, 2nd Edition. 2000. Upper Saddle River, NJ: Pearson Education, Inc.
TIA/EIA Telecommunications Building Wiring Standards, Latest Edition. Engelwood, CO: Global
Engineering Documents.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 2 ½ hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 10 hours are suggested to cover Voice, Data, and Video. You will
need to adjust the time required for hands-on activity and testing based on your class size and resources.
Topic
Planned Time
Session I. Introduction; Structured Cabling Systems A.Introduction
B. Structured Cabling Systems
1. Campus Backbone Subsystem
2. Equipment/Telecom Room Subsystem
3. Riser Subsystem
4. Horizontal Subsystem
5. Work Area Subsystem
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Session II. UTP and Coax Cable Terminations
A.UTP and Coax Cable Terminations
1. UTP Jack and Plug Terminations
2. RG6 Coax F-Type Terminations
_____________
_____________
_____________
Session III. Fiber-Optic Installation Considerations; Grounding and Bonding; Testing A.Fiber-Optic Installation Considerations
_____________
1. Tray and Duct Installation
_____________
2. Conduit Installation
_____________
3. Splice Closures/Organizers
_____________
4. Distribution Hardware
_____________
5. Patch Panels
_____________
6. Outlet Boxes
_____________
B. Grounding and Bonding
_____________
C. Testing
_____________
Session IV. Review and Testing A.Module Review
B. Module Examination
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
_____________
_____________
Motor Controls
Annotated Instructor’s Guide
Module 26311-11
Module Overview
This module introduces the methods and procedures used in selecting and wiring motor controls.
Prerequisites
Prior to training with this module, it is recommended that the trainee shall have successfully completed
Core Curriculum; Electrical Level One; Electrical Level Two; and Electrical Level Three, Modules 26301-11
through 26310-11.
Objectives
Upon completion of this module, the trainee will be able to do the following:
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 National Electrical Code® (NEC®)
requirements.
Performance Task
Under the supervision of the instructor, the trainee should be able to do the following:
1. Make all connections for a magnetic motor controller, controlled by two pushbutton stations, including the connections for holding the circuit interlock.
Materials and Equipment
Electrical Level Three PowerPoint® Presentation
Slides (ISBN 978-0-13-257133-3)
Multimedia projector and screen
Computer
Appropriate personal protective equipment
Whiteboard/chalkboard
Markers/chalk
Pencils and paper
Appropriate personal protective equipment
Copy of the latest edition of the National Electrical
Code®
Assorted wire and connectors necessary for making control circuit wiring connections
Assorted NEMA and IEC magnetic and manual
contactors and motor starters
Assorted manufacturer’s motor control device
catalogs/data sheets
Contactor/motor starter accessories including:
Power-pole adder kit
Timer attachment
Fuse kit
Transient suppression module
Internal auxiliary contacts
Control transformers
Pushbutton switches
Push-pull pushbutton switches
Selector switches
Pilot lights
Assorted pushbutton stations
Temperature switches
Pressure switches
Mechanical limit switches
Flow switches
Float switches
Foot switches
Jogging and plugging switches
Inductive and capacitive proximity sensors
Photoelectric switches/sensors
Drum switches
Assorted NEMA enclosures
240V motor
Tools necessary for making wiring connections
(continued)
Examples of wiring diagrams
Examples of circuit schedules/wire lists
Examples of control ladder diagrams
Examples of logic diagrams
Open-frame electromechanical power relays
Miniature electromechanical plug-in relays
Melting-alloy thermal overload relays
Bimetallic overload relays
Magnetic overload relays
Module Examinations*
Performance Profile Sheets*
* Single-module AIG purchases include the printed exam and performance task sheet. If you have purchased the perfect-bound version of this title, download these materials from the IRC using your access
code.
Safety Considerations
Ensure that the trainees are equipped with appropriate personal protective equipment.
Additional Resources
This module presents thorough resources for task training. The following resource material is suggested
for further study.
Electrical Motor Controls, Gary Rockis and Glen Mazur. Homewood, IL: American Technical Publishers,
Inc., 1997.
National Electrical Code® Handbook, Latest Edition. Quincy, MA: National Fire Protection Association.
NFPA 70E® Recommended Practice for Electrical Equipment Maintenance. Quincy, MA: National Fire
Protection Association, 2004.
Teaching Time for This Module
An outline for use in developing your lesson plan is presented below. Note that each Roman numeral in
the outline equates to one session of instruction. Each session has a suggested time period of 21⁄2 hours.
This includes 10 minutes at the beginning of each session for administrative tasks and one 10-minute
break during the session. Approximately 15 hours are suggested to cover Motor Controls. You will need to
adjust the time required for hands-on activity and testing based on your class size and resources. Because
laboratories often correspond to Performance Tasks, the proficiency of the trainees may be noted during
these exercises for Performance Testing purposes.
Topic
Planned Time
Session I. Introduction; Electromechanical Relays; Magnetic Contactors; Overload Protection A.Introduction
B. Electromechanical Relays
C. Magnetic Contactors
D.Overload Protection
_____________
_____________
_____________
_____________
Topic
Planned Time
Session II. Magnetic and Manual Motor Starters; Control Transformers and Pilot Devices A.Magnetic and Manual Motor Starters
1. Nonreversing and Reversing Magnetic Motor Starters
2. NEMA Magnetic Contactors/Motor Starters
3. IEC Magnetic Contactors/Motor Starters
4. Manual Motor Starters
5. Accessories
B. Control Transformers and Pilot Devices
1. Pushbutton and Selector Switches; Pilot Lights
2. Temperature and Pressure Switches
3. Mechanical Limit Switches
4. Flow, Float, and Foot Switches
5. Jogging and Plugging Switches
6. Proximity and Photoelectric Switches/Sensors
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Session III. Drum Switches; Enclosures; Diagrams
A.Drum Switches
B. Enclosures
C. Diagrams
1. Relating Diagrams to Equipment Wiring and Operation
Session IV. NEC® Regulations for the Installation of Motor Control Circuits;
Connecting Motor Controllers for Specific Applications
A.NEC® Regulations for the Installation of Motor Control Circuits
B. Connecting Motor Controllers for Specific Applications
C. PT/Laboratory
Have the trainees make all connections for a magnetic motor controller,
controlled by two pushbutton stations, including the connections
for holding the circuit interlock. This laboratory corresponds with
Performance Task 1.
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Session V. Review and Testing
A.Module Review
_____________
B. Module Examination
_____________
1.Trainees must score 70 percent or higher to receive recognition from
the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
C. Performance Testing
_____________
1.Trainees must perform each task to the satisfaction of the instructor to receive
recognition from the NCCER.
2.Record the testing results on Training Report Form 200, and submit the
results to the Training Program Sponsor.
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