Official Course Description:   MCCCD Approval:  05/23/95
IEC106      19956-20006	L+L	5 Credit(s)	5 Period(s)
Electric Motor Controls
Motor Control system, alternating current (AC) and direct current (DC) contactors and magnetic motor starters; time delay circuits, reversing circuits, power distribution systems and hazardous locations, signs and fiber optics. Prerequisites: IEC101 or permission of instructor.

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MCCCD Official Course Competencies:
IEC106   19956-20006	Electric Motor Controls

1.	Identify the specific Occupational Safety and Health Administration (OSHA) safety colors, explain safety for tools, draw specific electrical diagrams. (I)
2.	Explain the basic rules of line diagrams identify the specific sections of a control circuit and explain the basic logic functions (II)
3.	Identify and explain the difference between contactors and starters, explain the operation and purpose of solenoids. (III)
4.	Explain the different type of control wiring, Alternating Current/Direc Current (AC/DC) Contactors and size overload relays. (IV)
5.	Interpret complex line diagrams and explain time delay systems. (V)
6.	Explain the operation of specific control devices. (VI)
7.	Explain the methods for reversing specific circuits. (VII)
8.	Explain the generation of electricity and how the power is distributed. (VIII)
9.	List and explain hazardous location. (IX)
10.	Identify special types of hazardous locations. (X)
11.	Identify code requirements for signal and sign connections. (XI)
12.	Explain the theory of fiber optics. (XII)

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MCCCD Official Course Outline:
IEC106   19956-20006	Electric Motor Controls

I. OSHA safety, tool safety, and electrical diagrams A. Safety 1. Occupational Safety and Health Administration (OSHA) 2. Tools B. Drawing electrical diagrams 1. Control Voltage 2. Line identification 3. Control status 4. Controls II. Line diagram, control circuits and logic functions A. Line diagram-rules B. Section of a control circuit C. Logic function III. Contactors, starters and solenoids A. Contactors B. Starters C. Soleniod 1. Operation 2. Application 3. Failure IV. Control wiring, AC-DC contactors, overloads relay sizing A. Control wiring 1. Two wire 2. Three wire B. AC-DC contactors 1. Number of poles 2. Magnetic assembly 3. Arc Suppression C. Selecting and sizing overload relays V. Complex line diagram, time delay systems A. Line diagram 1. Contacts normal position 2. Line numbering 3. Mechanically interconnected B. Time delay 1. Dashpot 2. Synchronous 3. Solid state 4. Time delay logic 5. Timing codes VI. Control devices A. Selector switches B. Push-button C. Methods of indicating contact position D. Limit switches E. Other Types of control devices F. Logic modules VII. Reversing circuits A. Three phase motors B. Single phase motor C. DC motor D. Interlock reversing systems VIII. Power Distribution A. Generation of electricity B. Power transformers C. Substation function D. Switch and panel brands E. Motor control center F. Busway system IX. Hazardous Locations A. NEC article 500 1. Class 1 2. Class B. Equipment Marking 1. Temperature Classes 2. Class locations C. NEC article 501- Class 1 locations D. NEC article 502- Class 2 locations E. NEC article 503- Class 3 locations F. NEC article 504- Class 4 locations X. Special hazardous locations A. NEC article 511- Commercial garages B. NEC article 513- Aircraft hangers C. NEC article 514- Gasoline dispensing and service station D. NEC article 515- Bulk storage plants E. NEC article 516- Spray application XI. Signs and sign connections A. Signs 1. Portable 2. Outdoor B. NEC article 600-2 C. Grounding D. Enclosures E. Voltage 1. 1000v or less 2. Over 1000volts F. Transformers G. Fixed outline lighting XII. Fiber optics A. Theory B. Advantages C. Optical fiber D. Cable installation

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