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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > Building CNC Control Panels to Comply with NEC and NFPA 79
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  1. #1
    Join Date
    Sep 2005
    Posts
    1740

    Building CNC Control Panels to Comply with NEC and NFPA 79

    There has been some discussion on here about power sources, grounding and wiring control panels. NEC Section 670 (675) covers the Industrial Machine area pretty well, also the Code requirements for Grounding and wire sizing also applies to any panel built.

    NFPA 79 is a guideline for panel builders and its not mandatory except to comply with OSHA.

    This is a good place to start with NFPA 79, unless you want to purchase the 2018 Edition which is $65.

    Link to Siemens white paper for reference > https://assets.new.siemens.com/sieme...per-icp-us.pdf

    also > National Electrical Code Top Ten Tips: Article 409, Industrial Control Panels

    Or > https://library.e.abb.com/public/1b9...2yRbGpy34tjMzM
    Attached Thumbnails Attached Thumbnails Screen Shot 2019-10-06 at 5.23.23 PM.png  
    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP

  2. #2
    Join Date
    Dec 2003
    Posts
    24216

    Re: Building CNC Control Panels to Comply with NEC and NFPA 79

    There is an older version of NFPA79 in PDF out there, it may be still available.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  3. #3
    Join Date
    Feb 2009
    Posts
    6028

    Re: Building CNC Control Panels to Comply with NEC and NFPA 79

    UL508A is also another good source for panel code, It goes through the SCCR requirements/calculations and when and where it's needed.

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