Course Planning Tools Electrical Level 3

Electrical Level 3 Course Planning Tools

Course Planning Tools

Electrical Level 3

Copyright © 2020 NCCER. Permission is granted to reproduce this page provided that copies are for local use only and that each copy contains this notice.

Load Calculations – Branch and Feeder Circuits


Module 26301-20


Competencies/Equipment Lists | Load Calculations – Branch and Feeder Circuits | 2

26301-20

Load Calculations- Branch and Feeder CircuitsElectrical

OverviewThe purpose of branch circuit load calculations is to determine the sizes of branch circuit overcurrentprotection devices and branch circuit conductors using NEC® requirements. Sizing loads andprotection devices appropriately ensures safe, reliable electrical systems. This module explains howto calculate branch circuit and feeder loads for residential and commercial applications. It also coversvarious derating factors.

Learning Objective 1

Successful completion of this module prepares trainees to:Calculate branch circuit loads.

a. Calculate branch circuit ratings.b. Apply derating factors.c. Calculate branch circuit ampacity.


Successful completion of this module prepares trainees to:Identify residential branch circuit requirements.

a. Calculate lighting loads.b. Calculate receptacle loads.c. Calculate small appliance loads.d. Calculate laundry circuit loads.e. Calculate cooking appliance loads.f. Calculate water heater loads.g. Calculate electric heating loads.h. Calculate air conditioning loads.


Competencies/Equipment Lists | Load Calculations – Branch and Feeder Circuits | 3


Successful completion of this module prepares trainees to:Calculate commercial loads.

a. Calculate the loads on multi-outlet assemblies.b. Calculate show window loads.c. Calculate sign loads.d. Calculate loads for heavy-duty lamp holder outlets.e. Calculate commercial kitchen equipment loads.f. Calculate motor loads.g. Calculate welder loads.

Performance Tasks

This is a knowledge-based module. There are no Performance Tasks.Recommended Teaching Time: 17.5 hours

Classroom Equipment and Materials

• Whiteboard and markers• Pencils and paper• PowerPoint® Presentations for Module 26301-20• A variety of standard marker sizes• Poster board• Flip chart• LCD projector and screen• Computer with Internet access• Module Review answer key• Module Examinations• A copy of the National Electrical Code®


Conductor Selection and Calculations


Module 26302-20


Competencies/Equipment Lists | Conductor Selection and Calculations | 2

26302-20

Conductor Selection and CalculationsElectrical

OverviewThe ability to calculate conductor resistances and voltage drops is important when selectingconductors. This module explains how to make conductor calculations, and also covers other factorsinvolved in conductor selection, including insulation types, current-carrying capacity, temperatureratings, and voltage drop.


Successful completion of this module prepares trainees to:Select conductors for various applications.

a. Identify overcurrent protection for branch circuits and feeders.b. Identify the properties of conductors.


Successful completion of this module prepares trainees to:Size conductors based on expected load and voltage drop.

a. Calculate wire sizes based on resistance.b. Calculate conductor resistances.c. Calculate voltage drops for various applications.

Performance Tasks

This is a knowledge-based module. There are no Performance Tasks.Recommended Teaching Time: 15 hours


• Whiteboard and markers


Competencies/Equipment Lists | Conductor Selection and Calculations | 3

• Pencils and paper• PowerPoint® Presentations for Module 26302-20• A variety of standard marker sizes• Poster board• Flip chart• LCD projector and screen• Computer with Internet access• Module Review answer key• Module Examinations• A copy of the National Electrical Code®


Practical Applications of Lighting


Module 26303-20


Competencies/Equipment Lists | Practical Applications of Lighting | 2

26303-20

Practical Applications of LightingElectrical Level Three

OverviewThere are a variety of designs of incandescent, fluorescent, LED, induction, and HID luminaires, eachwith their own unique applications. Lighting systems are used in many different settings, including officebuildings, theaters, sports arenas, landscaping, and more. This module describes various luminairesand the types of luminaires suited for various applications. It also covers dimming, lighting controls, andenergy management systems.


Successful completion of this module prepares trainees to:Identify characteristics of luminaires.

a. Identify benefits and difficulties with different light distribution patterns.b. Categorize luminaires by mounting location.c. Choose luminaires for adverse locations.d. Determine special requirements.


Successful completion of this module prepares trainees to:Select lighting systems for various applications.

a. Identify types of lighting for indoor applications.b. Identify types of lighting for outdoor applications.


Successful completion of this module prepares trainees to:Select lighting controls for various applications.

a. Select dimmer systems for various applications.


Competencies/Equipment Lists | Practical Applications of Lighting | 3

b. Select occupancy and photo sensors.c. Use lighting timers.d. Apply these components to energy management systems.

Performance Tasks

1. Using manufacturers’ catalogs, select the appropriate luminaires for specific lighting situations.2. While touring selected structures to observe their lighting systems:

• Identify the various types of luminaires used.• Explain the specific purpose(s) served by the different luminaires.

Recommended Teaching Time: 12.5 hours



Performance Task 1• A variety of manufacturers’ catalogs

Performance Task 2• A selection of luminaires at various locations and installations• Paper and pen/pencil


Hazardous Locations


Module 26304-20


Competencies/Equipment Lists | Hazardous Locations | 2

26304-20

Hazardous LocationsElectrical

OverviewThe NEC® provides requirements of electrical equipment and wiring for all voltages in locations wherefire or explosion hazards may exist due to flammable gases or vapor, flammable liquids, combustibledust, or ignitable fibers or other flying materials. These locations are called hazardous locations. Thismodule describes the classifications and NEC® requirements for hazardous locations.


Successful completion of this module prepares trainees to:Identify hazardous locations.

a. Identify Class I locations.b. Identify Class II locations.c. Identify Class III locations.d. Locate NEC® requirements for hazardous locations.


Successful completion of this module prepares trainees to:Prevent ignitions and explosions in hazardous locations.

a. Identify sources of ignition.b. Select and install explosion-proof equipment and seals.

Performance Tasks

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.


Competencies/Equipment Lists | Hazardous Locations | 3

• Make sure the required number of threads are engaged.• Pull the three THHN conductors through the nipples and seal so that about 6" (150 mm) 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.

Recommended Teaching Time: 15 hours



Performance Task 1• The use of specific PPE and safety equipment is not expected during this session.• Performance Profile Sheets


Overcurrent Protection


Module 26305-20


Competencies/Equipment Lists | Overcurrent Protection | 2

26305-20

Overcurrent ProtectionElectrical

OverviewElectrical distribution systems are often quite complicated, and cannot be absolutely fail-safe. Circuitsare subject to destructive overcurrents due to harsh environments, general deterioration, damage,excessive expansion, or electrical distribution system overload. For this reason, protective devicesare essential for the prevention of costly damage to distribution system components, as well asfor protection against fire hazards in all electrical systems. This module explains how to size andselect circuit breakers and fuses for various applications. It also covers short circuit calculations andtroubleshooting.


Successful completion of this module prepares trainees to:Recognize overcurrent conditions.

a. Identify overload conditions.b. Identify short circuit conditions.c. Identify ground faults.d. Identify arc faults.


Successful completion of this module prepares trainees to:Identify fuses and their applications.

a. Identify fuse ratings.b. Identify types of fuses and their operating characteristics.c. Identifying fuse classes and applications.


Successful completion of this module prepares trainees to:



Identify circuit breakers and their applications.

a. Identify circuit breaker classifications.b. Identify circuit breaker interrupting capacity ratings.


Successful completion of this module prepares trainees to:Size and select overcurrent devices.

a. Select overcurrent devices for various applications.b. Apply short circuit calculations.


Successful completion of this module prepares trainees to:Test and troubleshoot circuit breakers and fuses.

a. Test and troubleshoot circuit breakers.b. Test and troubleshoot fuses.

Performance Tasks



• Whiteboard and markers• Pencils and paper• PowerPoint® Presentations for Module 26305-20• A variety of standard marker sizes• Poster board• Flip chart• LCD projector and screen• Computer with Internet access• Module Review answer key• Module Examinations



• A copy of the National Electrical Code®


Distribution Equipment


Module 26306-20


Competencies/Equipment Lists | Distribution Equipment | 2

26306-20

Distribution EquipmentElectrical

OverviewAn electrical power system consists of several subsystems on both the utility (supply) side and thecustomer (user) side. This module discusses switchboards and switchgear, including installation,grounding, and maintenance requirements. It also covers ground fault relay testing.


Successful completion of this module prepares trainees to:Identify electrical distribution system components.

a. Identify switchboard components and installation requirements.b. Identify switchgear components and installation requirements.c. Identify the operation and applications of medium-voltage limiting (MVL) switches.d. Identify the operation and applications of bolted pressure switches.e. Identify various transformers and their applications.f. Identify panelboard arrangements for various applications.


Successful completion of this module prepares trainees to:Identify the installation requirements for distribution equipment.

a. Identify the NEC® requirements for distribution equipment.b. Interpret electrical diagrams related to the installation of distribution equipment.


Successful completion of this module prepares trainees to:Test and maintain switchgear.


Competencies/Equipment Lists | Distribution Equipment | 3

a. Describe the general maintenance guidelines for switchboards and switchgear.b. List the test guidelines for switchboards and switchgear.c. Identify the devices used to monitor power distribution systems for ground faults.

Performance Tasks





Transformers


Module 26307-20


Competencies/Equipment Lists | Transformers | 2

26307-20

TransformersElectrical

OverviewWhen the AC voltage needed for an application is lower or higher than the voltage available from thesource, a transformer is used. The essential components of a transformer are the primary winding,which is connected to the source, and the secondary winding, which is connected to the load. Thismodule describes the construction, operation, and applications of various transformers. It also coverstransformer connections and grounding requirements.


Successful completion of this module prepares trainees to:Identify the construction and operation of a transformer.

a. Explain the operation of a typical transformer.b. Describe the construction of a typical transformer.c. Make transformer connections for various applications.


Successful completion of this module prepares trainees to:Apply the NEC® requirements for transformers and capacitors.

a. Identify the NEC® requirements for transformers.b. Identify the NEC® requirements for capacitors.c. Identify the NEC® requirements for resistors and reactors.


Successful completion of this module prepares trainees to:Troubleshoot and maintain transformers.

a. Identify common transformer problems.


Competencies/Equipment Lists | Transformers | 3

b. Perform transformer testing and maintenance.

Performance Tasks





Commercial Electrical Services


Module 26308-20


Competencies/Equipment Lists | Commercial Electrical Services | 2

26308-20

Commercial Electrical ServicesElectrical

OverviewNo matter the size or complexity, all electric services have the same purpose: to deliver electricalenergy safely. This module covers the components, installation considerations, and NEC®

requirements for commercial services.


Successful completion of this module prepares trainees to:Identify installation considerations for commercial services.

a. Identify service components.b. Locate NEC® requirements for commercial services.


Successful completion of this module prepares trainees to:Install commercial services.

a. Install overhead services.b. Install underground services.c. Install switchgear.d. Install multi-family services.

Performance Tasks



Competencies/Equipment Lists | Commercial Electrical Services | 3




Motor Calculations


Module 26309-20


Competencies/Equipment Lists | Motor Calculations | 2

26309-20

Motor CalculationsElectrical

OverviewA basic understanding of motor operation, components, and circuitry is essential when sizingconductors and protection devices. This module covers the calculations required to size the conductorsand overcurrent protection required for motor applications.


Successful completion of this module prepares trainees to:Identify motor connections and operating characteristics.

a. Calculate synchronous speed.b. Identify stator windings.


Successful completion of this module prepares trainees to:Size motor circuit conductors.

a. Calculate conductor ampacities for a typical motor control center.b. Calculate conductor ampacities for other motor applications.


Successful completion of this module prepares trainees to:Size motor protective devices.

a. Size fuses for short circuit protection.b. Size overcurrent protection for oversized motors.c. Size motor overload protection.d. Size short circuit protection for use with motor starters.


Competencies/Equipment Lists | Motor Calculations | 3

e. Size protective devices for multi-motor branch circuits.f. Size equipment grounding conductors.g. Install capacitors for power factor correction.

Performance Tasks





Voice, Data, and Video


Module 26310-20


Competencies/Equipment Lists | Voice, Data, and Video | 2

26310-20

Voice, Data and VideoElectrical

OverviewA structured cabling system is a system in which the main components, which are divided into fivesubsystems, do not change. Electricians are often involved in the installation of structured voice, data,and video cabling systems in various commercial applications, with each subsystem having its ownspecific installation requirements. This module covers the installation, termination, and testing of thesesystems.


Successful completion of this module prepares trainees to:Recognize various types of structured cabling systems.

a. Identify campus backbone subsystems.b. Identify equipment/telecom room subsystems.c. Identify riser subsystems.d. Identify horizontal subsystems.e. Identify work area subsystems.f. Identify distributed antenna systems.


Successful completion of this module prepares trainees to:Install and terminate various types of cable.

a. Terminate UTP jacks and plugs.b. Terminate RG6 F-type coaxial cable.c. Install fiber-optic cable.d. Ground and test VDV systems.


Competencies/Equipment Lists | Voice, Data, and Video | 3

Performance Tasks





Motor Controls


Module 26311-20


Competencies/Equipment Lists | Motor Controls | 2

26311-20

Motor ControlsElectrical

OverviewFor safety and proper operation in the intended environment, the installation of motor starters andcontrol circuit pilot devices requires that they be installed in the proper position and location. Thismodule provides information on selecting, sizing, and installing motor controllers, as well as controlcircuit pilot devices and basic relay logic.


Successful completion of this module prepares trainees to:Identify relays and contactors.

a. Identify electromechanical relays.b. Identify magnetic contactors.c. Identify types of motor overload protection.


Successful completion of this module prepares trainees to:Select magnetic and manual motor starters.

a. Select NEMA magnetic contactors/motor starters.b. Select IEC magnetic contactors/motor starters.c. Identify contactor/motor starter accessories.


Successful completion of this module prepares trainees to:Identify control transformers and pilot devices.

a. Identify control transformers.



b. Identify switches, sensors, and pilot lights.


Successful completion of this module prepares trainees to:Identify installation considerations for motor controls.

a. Select motor enclosures.b. Interpret installation diagrams.c. Identify NEC® regulations for motor control circuits.d. Connect motor controllers for specific applications.

Performance Task

1. Make all connections for a magnetic motor controller, controlled by two pushbutton stations,including the connections for holding the circuit interlock.

Recommended Teaching Time: 12.5 hours



Performance Task 1• Module Review• Answer Key• Module Examination



• Performance Profile Sheets• PPE


Documents

Course Planning Tools Electrical Level 3