This document establishes the minimum electrical safety requirements for one- and two-family dwellings. This edition of the National Electrical Code (NFPA 70) was prepared by the National Electrical Code Committee and approved by the NFPA, superseding all previous editions. It incorporates amendments made through Tentative Interim Amendments (TIAs) and Errata, with an effective date of August 24, 2016. The code is intended to provide the minimum requirements for the safe installation of electrical systems and equipment.

This edition of the National Electrical Code is a foundational document for electrical safety in residential construction. It is regarded as an essential standard by electricians, inspectors, and building professionals. The inclusion of Chicago Amendments ensures its direct applicability for projects within that jurisdiction. The code's rigorous development process by the National Electrical Code Committee and adoption by the NFPA lends it significant authority.