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Official Course
Description: MCCCD Approval:
3-25-2003 |
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ABC131
2003 Summer I – 2011 Summer
II |
L+L
1.0 Credit(s) 1.0 Period(s) 1.0 Load Occ |
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Cable
Tray Installation |
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National Electrical Manufacturer's Association (NEMA) and
National Electrical Code (NEC) requirements for cable tray modified
installation and cable installation procedures. Prerequisites: Registered Apprentice
status or permission of the Apprenticeship Coordinator. |
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Go to Competencies Go to Outline
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MCCCD
Official Course Competencies: |
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ABC131 2003
Summer I – 2011 Summer II |
Cable Tray Installation |
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1.
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Describe the components that make up a cable tray
assembly. (I) |
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2.
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Explain the National Electrical Manufacturer's Association
(NEMA) standards for cable tray installations. (II) |
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3.
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Describe how cable exits from cable trays. (III) |
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4.
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Use the proper cable tray fittings for specific
applications. (IV) |
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5.
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Demonstrate specific support methods for cable trays. (V) |
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6.
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Explain the National Electrical Code (NEC) requirements
for cable tray installation. (VI) |
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7.
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Demonstrate cable installation requirements and
procedures. (VII) |
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8.
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Interpret electrical working drawings showing cable tray
fittings. (VIII) |
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9.
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Pull cable through a cable tray system. (IX) |
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10.
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Demonstrate safety procedures for cable tray system
installation. (X) |
Go to Description Go to top of
Competencies
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MCCCD
Official Course Outline: |
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ABC131 2003
Summer I – 2011 Summer II |
Cable Tray Installation |
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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 |