NFPA 70, National Electrical Code (NEC) 2023

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Stay current with the code the electrical industry depends on to address today’s evolving electrical hazards, technologies, and installation practices with NFPA 70®, National Electrical Code® (NEC®).

The NEC is the authoritative code governing electrical installations in residential, commercial, and industrial occupancies. Revised every three years, NFPA 70 helps keep pace with changing industry practices, renewable energy systems, electric vehicles, communication technologies, and modern electrical safety challenges.

The code provides comprehensive requirements for electrical design, installation, inspection, and maintenance, making it an essential resource for designers, installers, inspectors, engineers, electricians, contractors, and authorities having jurisdiction (AHJs).

Completely reorganized for improved usability, the 2023 NEC also features an expanded Article 100 that consolidates all defined terms in one location, helping users quickly locate critical code information.

Highlights

The 2023 edition of NFPA 70®, National Electrical Code® (NEC®) includes new, expanded, and revised requirements covering:

Electrical Systems

Use and approval requirements for reconditioned electrical equipment
Level and flat standing surfaces within required working spaces for electrical equipment
Servicing and maintenance requirements for electrical equipment
Provisions addressing opened electrical equipment doors that obstruct access or egress from required workspaces

Residential Electrical Systems

Expanded GFCI protection requirements for specific appliances
Optional installation requirements for receptacle outlets serving island and peninsular countertops and work surfaces
Emergency disconnect requirements for one- and two-family dwellings
Provisions permitting the use of 10-ampere branch circuits
New annex guidance addressing electrically powered medical equipment in homes and residential board and care occupancies

Commercial and Industrial Electrical Systems

Updated GFCI requirements for specific appliances
Requirements related to replacement panelboards
AFCI protection requirements for sleeping areas in public safety and first responder facilities
Disconnecting means requirements for luminaires using double-ended lamps, including LED types
Additional safety and installation provisions for commercial and industrial occupancies

Alternative Energy and Energy Management Systems

Requirements for interconnection of distributed on-site power supplies with utility systems
Clarification distinguishing storage battery systems from emergency storage systems
Commissioning requirements for energy storage systems (ESS)
Updated photovoltaic electric system requirements
Emergency energy management system provisions
Revised load calculations for outlets supplying electric vehicle supply equipment
Requirements for solar photovoltaic and wind power systems installed on floating structures and offshore locations

New Articles and Emerging Technologies

The 2023 NEC introduces new articles and requirements addressing technologies and systems not previously covered, including:

Class 4 fault-managed circuits
Hazardous locations within commercial and industrial cannabis production facilities
Equipotential bonding requirements around splash pads
Insulated bus pipe and tubular covered conductor systems
Flexible bus systems
Germicidal irradiation lighting equipment
Additional emerging technologies and specialized electrical systems

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