National Electrical Installation Standards

Standards as High as Your Own


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What are NEIS? National Electrical Installation Standards (NEIS) are the first and only quality and performance standards for electrical construction. They go beyond the minimum safety requirements of the National Electrical Code (NEC) to define what is meant by installing electrical products and systems in a “neat and workmanlike manner.”

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NECA 202-2013 Standard for Installing and Maintaining Industrial Heat Tracing Systems (ANSI)

This standard describes procedures for the installation, testing, and documentation of electrical freeze protection and process heat tracing systems. Heat tracing cable types covered by this publication include: self-regulating, constant wattage, and zone heating cables and mineral insulated (MI) heating cables.NECA 202 is approved as an American National Standard (ANSI).
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NECA/NEMA 605-2005, Recommended Practice for Installing Underground Nonmetallic Utility Duct (ANSI)

Describes the installation, shipping, and handling of underground single bore nonmetallic duct for power, lighting, signaling, and communications applications. Developed jointly with the National Electrical Manufacturers Association, NECA/NEMA 605 is approved as an American National Standard (ANS).

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State Regulationsusa country shape

Find the major provisions of electrical code, enforcement, and contractor/electrician licensing requirements for each state in the U.S. It is based upon information supplied by NECA Chapters.

State Electrical Regulations
State Low Voltage Licensing

Code Question of the Daytextbook

  • Wednesday, October 01, 2014
    CQD: 10/1/2014

    Re: CQD published Friday, September 5, 2014

    The use of glue on PVC box connectors or gluing into a box provided PVC connector with ENT is probably a violation of the UL listing of this raceway and that would make the installation a violation of NEC.

    Cordially, Bill Nolte,

    Charlie, Thanks for all your great work.

    On Sept 4th a guy asked a question in part about using Blue ENT with Carlon products by gluing them together. Much as one would assemble PVC. I have done this coming in from a PVC 3/4'" run for a Pool to an LB then to 3/4 ENT and it works great to give me a continuous 3/4 run to the panel, but flexible. Is there any reason it wouldn't be allowed.  ENT glued to Carlon products?

    Thanks, Don Hartley


    I think Mr. Dowdy was also concerned with the use of PVC cement being used to connect/secure the ENT to the PVC floor box. The NEC does not address this application except through Section 110.3(B). However, in addition to the manufacturer's installation instructions, one should look at the UL White Book under UL Product Category FKHU (ELECTRICAL NONMETALLIC TUBING) where the following information is located;

    Fittings — The outside diameters of ENT are such that standard connectors, couplings and outlet boxes for rigid PVC conduit can be employed for ENT that is also constructed of PVC. Installation instructions are provided with each bundle or coil of ENT outlining the procedure to be used when employing cemented-on PVC conduit fittings and outlet boxes. These techniques include the specific cement to be used as well as its application method.

    Keep up the GREAT job, I enjoy reading CQD.

    Jeff Fecteau, Senior Regulatory Engineer, UL LLC

  • Tuesday, September 30, 2014
    CQD: 9/30/2014
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