Results 1 to 4 of 4

Thread: Cable Tray Entrance/ Penetration on Enclosure

  1. #1
    Join Date
    Jan 2012
    Location
    PH/VN
    Posts
    30

    Cable Tray Entrance/ Penetration on Enclosure

    Is there any clause on NEC stating the sealing of entrance of power panels/ enclosure as what we are doing when cable tray penetrates a wall, floor?
    The inspector is asking to put silicon on small gaps above a distribution panel.

    Thanks in advance.
    It is better to commit stupid questions, that to commit stupid mistakes.

  2. #2
    Join Date
    Jun 2006
    Location
    Ohio
    Posts
    12,828
    Quote Originally Posted by Cloud View Post
    Is there any clause on NEC stating the sealing of entrance of power panels/ enclosure as what we are doing when cable tray penetrates a wall, floor?
    The inspector is asking to put silicon on small gaps above a distribution panel.

    Thanks in advance.
    Here's one...

    Quote Originally Posted by 2011 NEC
    110.12 Mechanical Execution of Work. Electrical equipment
    shall be installed in a neat and workmanlike manner.

    Informational Note: Accepted industry practices are described
    in ANSI/NECA 1-2006, Standard Practices for
    Good Workmanship in Electrical Contracting, and other
    ANSI-approved installation standards.

    (A) Unused Openings.
    Unused openings, other than those
    intended for the operation of equipment, those intended for
    mounting purposes, or those permitted as part of the design
    for listed equipment, shall be closed to afford protection substantially
    equivalent to the wall of the equipment. Where metallic
    plugs or plates are used with nonmetallic enclosures,
    they shall be recessed at least 6 mm (1⁄4 in.) from the outer
    surface of the enclosure.

    (B)Integrity of Electrical Equipment and Connections.
    Internal parts of electrical equipment, including busbars,
    wiring terminals, insulators, and other surfaces, shall not be
    damaged or contaminated by foreign materials such as
    paint, plaster, cleaners, abrasives, or corrosive residues.
    There shall be no damaged parts that may adversely affect
    safe operation or mechanical strength of the equipment
    such as parts that are broken; bent; cut; or deteriorated by
    corrosion, chemical action, or overheating.
    I'll never get there. No matter where I go, I'm always here.

  3. #3
    Join Date
    Jan 2012
    Location
    PH/VN
    Posts
    30
    and i think i need to look for the NEMA/IP ratings required for these enclosures.
    thanks for the help.
    It is better to commit stupid questions, that to commit stupid mistakes.

  4. #4
    Join Date
    Jun 2006
    Location
    Ohio
    Posts
    12,828
    Quote Originally Posted by Cloud View Post
    and i think i need to look for the NEMA/IP ratings required for these enclosures.
    thanks for the help.
    Yes, you have to maintain the environmental integrity of electrical enclosures.
    I'll never get there. No matter where I go, I'm always here.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •