National Electrical Installation Standards

Standards as High as Your Own


Featured Standards


NECA 303-2019 Standard for Installing Closed-Circuit Television Systems (CCTV)

This standard describes installation procedures for new closed-circuit television (CCTV) system equipment installed for video surveillance and for protection of building interiors, building perimeter, and surrounding property.

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NECA 120-2018 Standard for Installing Armored Cable (Type AC) and Type Metal-Clad (MC) Cable

This standard covers the identification, selection and installation of Type AC and Type MC cables, which are used for electrical wiring for residential, commercial and industrial occupancies.

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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.

US Electrical Codes & Regulations by State »
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NEC Adoption by State

Building Codes Assistance Project Energy Code Adoption

Code Question of the Daytextbook

  • Thursday, July 29, 2021
    CQD 7/29/2021

    Hello NEC Friends,

    Does the maximum 25-ohm resistance-to-ground value apply to a concrete-encased grounding electrode? Is a test required for this? You opinion is valued.


    Peter Thompson

  • Wednesday, July 28, 2021
    CQD 7/28/2021
    View Question and Answer

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