NFPA 70, National Electrical Code (NEC) 2020

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).

Organized for ease of use, the NEC helps professionals improve electrical safety, reduce hazards, and support code-compliant installations across a broad range of applications.

Highlights

Key updates and changes to the 2020 edition of NFPA 70®, National Electrical Code® (NEC®) include:

• Added, revised, and reorganized content addressing worker safety, energy systems, electric vehicles, limited energy systems, and communication systems
• Updated service disconnect requirements designed to help protect workers from arc flash hazards
• Revised installation practices supporting evolving Power over Ethernet (PoE) technologies
• Modernized calculation tables reflecting improvements in energy efficiency and alignment with evolving codes
• Revised ground-fault protection requirements for marinas and boatyards
• New guidelines covering the safe use of electric vehicles as backup or emergency power sources for buildings and homes
• Reorganization of Article 310 with more user-friendly numbering for ampacity tables
• New definition for cable bundle in Article 725

Significant New Requirements

The 2020 NEC introduces important new requirements covering:

• Exterior emergency disconnects for one- and two-family dwellings to improve emergency responder safety
• Residential receptacle outlet installation requirements for island and peninsular countertops
• Surge protection requirements for services supplying dwelling units
• Working space requirements for housekeeping pads serving electrical equipment
• Installation of wiring methods in exit enclosures
• Sizing of supply and load conductors used with adjustable-speed drive systems
• AFCI protection requirements for branch circuits in patient sleeping areas within care facilities
• Load calculations for electric vehicle supply equipment with variable current settings
• Worker safety provisions for identifying power sources associated with disconnecting means
• Egress requirements for spaces containing large electrical equipment
• Grounding requirements for disconnecting means installed on the supply side of service disconnects
• Requirements for cables installed exposed on ceiling surfaces and sidewalls
• Special occupancy and equipment provisions involving splash pads, hazardous classified locations, swimming pools, and other bodies of water

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