Official Course Description: MCCCD Approval: 11/22/94
ABC222 19952-99999 LEC 0.50 Credit(s) 0.50 Period(s)
Hazardous Locations-Electrical
Hazardous location classifications. Equipment approved for use in specific hazardous locations. Wiring methods. Prerequisites: (Indentured status with Associated Builders and Contractors, Inc., and ABC125), or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABC222   19952-99999 Hazardous Locations-Electrical
1. Identify specific classifications of hazardous locations. (I)
2. Explain the main purpose of using explosion-proof fittings and wiring methods. (II)
3. Explain the characteristics of specific explosion proof equipment and describe the installation of each. (III)
4. Describe the hazardous areas in commercial garages and similar locations. (IV)
5. Identify the hazardous areas in airport hangers. (V)
6. Explain the proper wiring of motion picture projection rooms using NEC Article 540 as a reference. (VI)
7. Explain the wiring methods used in hospitals and healthcare facilities using NEC Article 517 as a reference. (VII)
8. Explain the importance of following approved drawings and specifications on petro/chemical projects. (VIII)
9. Explain how to obtain manufacturers' reference catalogs and other data dealing with hazardous areas. (IX)
10. Identify the proper wiring methods for hazardous locations Class I, Class II and Class III. (X)
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MCCCD Official Course Outline:
 
ABC222   19952-99999 Hazardous Locations-Electrical
    I. Classifications of hazardous locations
        A. Class I
          1. Divisions
          2. Groups
        B. Class II
          1. Divisions
          2. Groups
        C. Class III
          1. Divisions
          2. Groups
      II. Prevention of external ignition/explosion - explosion-proof fittings and wiring methods
          A. Sources of ignition
          B. Combustion principles
          C. Application rules
            1. Class I - division 1
            2. Class I - division 2
            3. Class II - division 1
            4. Class II - division 2
            5. Class III - divisions 1 & 2
        III. Explosion-proof equipment
            A. Intrinsically safe equipment
            B. Explosion proof conduit and fittings
            C. Seals and drains
            D. Selection of seals and drains
            E. Types of seals and fittings
            F. Sealing compounds and dams
          IV. Garages and similar locations - hazardous locations
              A. Equipment in hazardous locations
              B. Equipment above hazardous locations
              C. Gasoline dispensers
              D. Grounding
              E. Underground wiring
            V. Airport hangers - hazardous locations
                A. VMV
                B. Vaporguard
                C. Electrical and compressed air service pit
                D. Other
              VI. Theaters - wiring
                  A. Ventilation
                  B. Wiring
                  C. NEC Art 540
                VII. Hospitals - wiring
                    A. Anesthetizing areas
                    B. Gas storage areas
                    C. X-ray equipment
                    D. NEC Art. 517
                  VIII. Petro/chemical facilities - drawings and specifications
                      A. NEC
                      B. Federal ordinances
                      C. State ordinances
                      D. Local ordinances
                    IX. Manufacturers' data - sources
                        A. Local distributors
                        B. Manufacturer direct
                        C. Specific companies
                      X. Wiring methods
                          A. Class I
                          B. Class II
                          C. Class III
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