Standard |
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, and transformer connections (single-phase and three-phase step down).
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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 |
1 |
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Transformer Connections (Single-Phase and Three-Phase Step Down) |
P. Lab/O.B.I. |
2 |
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Credit |
4 |
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Prerequisite: |
ELT 107 |
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Corequisite: |
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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 |
P. Lab/ O.B.I. |
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THREE-PHASE POWER SYSTEMS |
15 |
3 |
7 |
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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 |
15 |
4 |
6 |
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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) |
10 |
3 |
7 |
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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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Suggested Resources |
Adams, J., & Rockmaker, G. (1985). Industrial electricity: Principles and
practices (3rd ed.). New York: McGraw-Hill.
American Productivity & Inventory Control
Society. (1987). Maintenance and repair
operations reprints. Falls Church, VA: Author.
Baitch, T. (1984). Electrical technology. New York: John Wiley & Sons.
Court, M. (1988). Lab manual for first course in electrical technology. New York:
John Wiley & Sons.
Hawkins, H. M. (1983). Residential wiring: Concepts and practices. North Scituate, MA:
Brenton.
Holzman, H. N. (1986). Modern residential wiring. South Holland, IL: Goodheart-Willcox.
Hughes, E. (1987). Electrical technology (6th ed.). New York: John Wiley & Sons.
Office of Personnel Management. (1988). Industrial equipment mechanic. Syosset,
NY: Natl Learning.
Schram, P. J., & Murray, R. H. (1987). The national electrical code (4th ed.).
Quincy, MA: National Fire Protection Association.