National Electrical Installation Standards

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NECA303-19Cover-WEB

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.

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Code Question of the Daytextbook

  • Monday, November 18, 2019
    CQD: 11/18/2019

    The answer to last Monday's question did not get published on Tuesday November 12 so we are republishing it.

    I have a stepdown transformer 480V-120V. Usually for single phase, 120 Volts is line to neutral, is there any code violation per NEC 250.26 if the connection is 120 Volts line to line, both conductors are ungrounded? 

    Jesus Santos

  • Friday, November 15, 2019
    CQD: 11/15/2019
    View Question and Answer

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