National Electrical Installation Standards (NEIS)

News & Updates

Call for Public Review

All NEIS Currently Available for Public Review »

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.

» Learn More

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.

» Learn More

Recent Videos

Why Practice Safety? from NECAnet on Vimeo.

See more videos »

State Regulations

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 »
Licensing Information by State ».

NEC Adoption by State

Building Codes Assistance Project Energy Code Adoption

Code Question of the Day

Friday, January 17, 2020
CQD: 01/17/20

Gentlemen, I’m hoping you can help with an opinion.

As you seem to understand how to apply the NEC rules from a practical viewpoint. Section 230.72 indicates the two to six service disconnects permitted in Section 230.71 must be grouped. There is no maximum distance on between the two to six disconnects, so how far is too far before the installation would not meet the grouping requirement. Could signage be installed to assist in meeting the grouping requirement? Any opinions would be very appreciated.

Mark Taylor
Thursday, January 16, 2020
CQD: 01/16/20
View Question and Answer

How's your knowledge?
» Get the Answer!

National Electrical Installation Standards

Join the Review Process

What are NEiS?