Hundreds of changes were presented in the 2017 edition NEC® .
NFPA 70, NEC has been published since 1897, and a rigorous process of review keeps it up-to-date with new technologies. In fact, more than 4,000 public inputs and 1,500 comments went into the 2017 NEC alone, including five all-new articles added during the 2017 cycle, paving the way to a safeer and more efficient electrical future.
Major additions reflect the continuing growth in renewable power technology.
This edition of the NEC addresses the advancement of privately owned wind and solar power generation and distribution equipment -- including coverage of higher voltage systems that were once only the utilities' domain. The new consumer role is a major factor in energy decentralization, and expanded NEC coverage is vital for designers, engineers, contractors, and AHJs.
- Large-Scale Photovoltaic (PV) Electric Power Production Facility (New Article 691) covers systems that produce at least 5 megawatts (MW) of power, or enough to power 800+ U.S. homes.
- Energy Storage Systems (New Article 706) governs ESS installation, disconnection, shutdown, and safety labeling.
- Stand-Alone Systems (New Article 710) covers power production sources that are not connected to the grid, including PV and wind-powered systems.
- Direct Current Microgrids (New Article 712) concerns independent energy distribution networks that allow the utilization of power from dc sources to direct-current loads. Microgrids are on the rise worldwide.
Other NEC revisions protect the public and workers from deadly hazards.
- New labeling, such as detailed arc flash hazard warning on equipment, helps workers and supervisors assess electrical risks.
- New minimum space clearances for equipment installation clarify the safeguards needed to protect installers and maintainers.
- Fixed Resistance and Electrode Industrial Process Heating Equipment (New Article 425) presents needed regulations for industry.
- Revised provisions for AFCI and GFCI protection improve electrical and fire safety in homes.
Be prepared to protect lives and property, and order the 2017 National Electrical Code.
Work with safety requirements governing public and private buildings, homes, and structures; outdoor yards and lots; utility equipment; installations that connect to the power grid; and consumer-owned power generation systems and equipment. The 2017 NEC is better aligned with the 2018 NFPA 70E®, Standard for Electrical Safety in the Workplace®. (Print, 888 pp., 2017)