NFPA 70, National Electrical Code (NEC) 2017

Stay current with the code the electrical industry depends on to address today’s evolving electrical hazards and technologies 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, emerging technologies, renewable energy systems, 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 wide range of applications.

Highlights

Key updates and changes to the 2017 edition of NFPA 70®, National Electrical Code® (NEC®) include:

• Major additions reflecting the continued growth of renewable energy technologies
• Expanded coverage addressing privately owned wind and solar power generation and distribution equipment
• New provisions covering higher-voltage systems once limited primarily to utility applications
• Recognition of the evolving consumer role in energy decentralization
• Expanded guidance for designers, engineers, contractors, and AHJs working with modern power systems
• New Article 691, Large-Scale Photovoltaic (PV) Electric Power Production Facility, covering systems producing at least 5 megawatts (MW) of power
• New Article 706, Energy Storage Systems, governing ESS installation, shutdown, disconnection, and safety labeling
• New Article 710, Stand-Alone Systems, covering off-grid power production systems including photovoltaic and wind-powered systems
• New Article 712, Direct Current Microgrids, addressing independent DC energy distribution systems
• Enhanced labeling requirements, including detailed arc flash hazard warnings to improve worker safety
• Revised minimum workspace clearances for electrical equipment installation and maintenance
• New Article 425 covering Fixed Resistance and Electrode Industrial Process Heating Equipment
• Updated AFCI and GFCI protection requirements to improve electrical and fire safety in homes
  

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