National Electrical Installation Standards

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Revision of NECA 121-201X, Standard for Installing Nonmetallic-Sheathed Cable (Type NM-B)and Underground and Branch Circuit Cable (TypeUF)

Revision of NECA 303-201X, Standard for Installing and Maintaining Closed-Circuit Television (CCTV) Systems


Revision of NECA 413-201X, Standard for Installing and Maintaining Electric Vehicle Supply Equipment (EVSE)



All NEIS Currently Available for Public Review

Featured Standards


NECA 416-2016 Recommended Practice for Installing Energy Storage Systems

This standard describes methods and procedures used for installing multiple types energy storage systems. It also includes information about controlling and managing energy storage systems, in addition to commissioning and maintaining energy storage systems.
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NECA/FOA 301-2016 Standard for Installing and Testing Fiber Optics

This standard describes installation and test procedures for fiber optic cabling networks. This standard applies fiber optic cabling installed indoors (premises installations) and outside plant (OSP) applications.
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Find the major provisions of electrical code, enforcement, and contractor/electrician licensing requirements for each state in the U.S.

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Building Codes Assistance Project Energy Code Adoption

Code Question of the Daytextbook

  • Thursday, August 16, 2018
    CQD: 8/16/2018

    I have a job at the NIH facility in Bethesda Maryland that I need to run a nitrogen line to a room being remodeled. We want to run the nitrogen line through an electrical room. The nitrogen line would run over several electrical panels. Can I run the nitrogen line over the electrical panels, Is this acceptable with the NEC codes? Nitrogen is non combustible in fact it takes the air away from a fire should a fire start in the electrical panel. I would appreciate your response to this question, Thanks for your time. If the nitrogen line can run in the electrical room code you please provide me with a code number.

    Walt Ugolick

  • Wednesday, August 15, 2018
    CQD: 8/15/2018
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