National Electrical Installation Standards

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Message from OSHA for Hurricane Delta

Thank you for your work to assist communities in the path of Hurricane Delta. Conditions in Louisiana and Southeast Texas may become hazardous for workers who will be restoring power, and performing cleanup and recovery operations. OSHA wants you to stay safe while helping others. Responding to emergencies like this during a pandemic makes worker safety even more challenging. Please take all necessary precautions to protect your crews from the spread of COVID-19.
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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

  • Tuesday, October 27, 2020
    CQD 10/27/20

    Good afternoon,

    I am remodeling my house and wanted to know per NEC 2014, Can I use 1/2" metallic liquid Tight conduit for runs longer than 6' if, I pulled a dedicated ground wire.

    Thank you, 

    Brad Everett

  • Monday, October 26, 2020

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