Official Course Description: MCCCD Approval: 04/22/97
ABC131 19976-99999 L+L 1 Credit(s) 1 Period(s)
Cable Tray Installation
National Electrical Manufacturer's Association (NEMA) and National Electrical Code (NEC) requirements for cable tray modified installation and cable installation procedures. Prerequisites: Indentured status with Associated Builders and Contractors, Inc., or permission of the apprenticeship coordinator.
Go to Competencies    Go to Outline
 
MCCCD Official Course Competencies:
 
ABC131   19976-99999 Cable Tray Installation
1. Describe the components that make up a cable tray assembly. (I)
2. Explain the National Electrical Manufacturer's Association (NEMA) standards for cable tray installations. (II)
3. Describe how cable exits from cable trays. (III)
4. Use the proper cable tray fittings for specific applications. (IV)
5. Demonstrate specific support methods for cable trays. (V)
6. Explain the National Electrical Code (NEC) requirements for cable tray installation. (VI)
7. Demonstrate cable installation requirements and procedures. (VII)
8. Interpret electrical working drawings showing cable tray fittings. (VIII)
9. Pull cable through a cable tray system. (IX)
10. Demonstrate safety procedures for cable tray system installation. (X)
Go to Description    Go to top of Competencies
 
MCCCD Official Course Outline:
 
ABC131   19976-99999 Cable Tray Installation
    I. Cable Tray Systems
        A. Trade terms
        B. Basic forms
          1. Ladder
          2. Trough
          3. Solid bottom
      II. NEMA Standards
          A. Load factors
          B. Fill density
          C. Load support
          D. Deflection under load
          E. Failure under load
          F. Splicing straight sections
          G. Cable placement in tray
          H. Cable tray covers
        III. Cable Exit
            A. NEC regulations
            B. No plate
            C. No drop-out plate
            D. Drop-out plate
          IV. Cable Support Fittings
              A. Vertical trays
              B. Cable edge protection
              C. Vertical adjustable splice plates
              D. Horizontal adjustable splice plates
              E. Expansion splice plates
              F. Divider strip
              G. Divider strip cable protector
            V. Cable Tray Support
                A. Trapeze mounting
                B. Direct rod suspension
                C. Wall mounting
                D. Pipe-rack mounting
              VI. NEC Requirements
                  A. Article 318
                    1. Construction
                    2. Installation
                    3. Grounding
                  B. Article 340
                    1. power cable
                    2. control cable
                VII. Cable Installation Procedures/Requirements
                    A. Conductors connected in parallel
                    B. Number of cables allowed
                      1. 4/0 or larger
                      2. Smaller than 4/0
                      3. Combination cables
                      4. Solid bottom tray
                      5. Single conductor cables
                    C. Ampacity of cable tray conductors
                  VIII. Cable Tray Drawings
                      A. Fittings
                      B. Drawing interpretation
                    IX. Pulling Cable in Tray Systems
                      X. Safety Procedures
                          A. Cable tray systems
                          B. Cable pulling
                      Go to Description    Go to top of Competencies    Go to top of Outline