Standard
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ELT 108 – Commercial Wiring II
Presents the
study of three-phase power systems, fundamentals of AC motor controls, and the
basic transformer connections. Topics include: three-phase power
systems, fundamentals of AC motor control, transformer connections
(single-phase and three-phase step down), and introduction to low voltage
systems.
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Competency Areas: |
Hours: |
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Three-Phase Power Systems |
Class |
4 |
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Fundamentals of AC Motor Control |
D. Lab |
0 |
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Transformer Connections (Single-Phase and Three-Phase Step
Down) |
P. Lab/O.B.I. |
3 |
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Introduction to Low Voltage Systems |
Credit |
5 |
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Prerequisite: |
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Corequisite: |
ELT 107 |
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Need Guide Material from Working Committee |
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Course Guide
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Competency |
After completing this section, the student will: |
Hours |
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Class |
D. Lab
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P. Lab/
O.B.I. |
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THREE-PHASE POWER SYSTEMS |
10 |
0
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8 |
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Power systems |
Recognize power systems with resistive, inductive, and
capacitive loads. |
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Power factors |
Calculate power factors in power systems with resistive,
inductive, and capacitive loads (reactance). |
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FUNDAMENTALS OF AC MOTOR CONTROL |
12 |
0
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7 |
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Fundamentals |
Install toggle switch for a single-phase motor. |
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Install overload protection. |
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Connect a capacitor start motor. |
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Identify induction-type motors. |
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Install manual and magnetic starters. |
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Identify reversing drum controls. |
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List and identify limit switches, stop switches, and run
switches. |
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Identify reversing control circuits. |
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Connect three-phase motors for low or high voltage. |
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TRANSFORMER CONNECTIONS (SINGLE-PHASE AND THREE- PHASE
STEP DOWN) |
8 |
0
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8 |
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Connections |
Determine Wye or Delta transformer connections. |
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Identify three-wire single-phase connections. |
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Connect wiring to low-voltage door chime system. |
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INTRODUCTION TO LOW
VOLTAGE SYSTEMS |
10 |
0
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7 |
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Suggested Resources
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Alerich/Herman,
Electric Motor Control (6th
ed.), Delmar Publishers, ISBN0-8273-7644
Graham,
Kennard C., Industrial and Commercial
Wiring, American Technical Society, ISBN
0-8269-1500-0
Clidero,
Robert and Sharpe, Kenneth, Construction
Wiring, Delmar Publishers Inc., ISBN
0-8273-2134-1
Croft
Terrell and Summers, Wilford, American Electricians Handbook, McGraw-Hill
Publishers ISBN 0-07-013936-9
Hart, Ugly’s Electrical References, Burleson Distribution Corp. ISBN 0-9623229-6-2
Herman, Delmar’s Standard Textbook of Electricity
(2nd ed.), Delmar Publishers ISBN
0-8273-8550-1
Henry,
Tom, Calculations for the Electrical Exam
2002, Tom Henry Publisher, Item # 105-02
Holzman,
Harvey, Modern Commercial Wiring Book
Based on the 2002 NEC,
Published by Goodheart-Wilcox, ISBN 1-56637-916-4
Mullin/Smith,
Electrical Wiring Commercial (11th
ed.), Delmar Publishers ISBN 0-7668-3342-9
Paschal,
John, EC&M’s Electrical Calculations Handbook, McGraw Hill Publishing Co. ISBN 0071360956
Rockis/Mazur,
Electric Motor Controls (2nd
ed.), American Technical Publishers ISBN
0-8269-1675-9
Rockis/Mazur,
Electric Motor Controls Workbook (2nd
ed.), American Technical Publishers ISBN 0-8269-1676-7
Stallcup,
Stallcup’s Electrical Design Book For 2002, Publisher NFPA, ISBN G4-SED-02
Rosenberg,
Robert; Electrical Motor Repair (3rd
ed.), Delmar Publishers, ISBN 0-03-059584-3
Modern Commercial Wiring Workbook
Based on the 2002 NEC,
Published by Goodheart-Wilcox,
ISBN 1-56637-917-2
NEC 2002 Code, Published by NFPA, Distributed by Delmar Publishers
Plant Engineering / Electrical
Maintenance, Plant Engineering Training Systems, Technical
Publishers Co. ISBN unknown