National Electrical Safety Code

The National Electrical Safety Code (NESC) or ANSI Standard C2 is a United States standard of the safe installation, operation, and maintenance of electric power and communication utility systems including power substations, power and communication overhead lines, and power and communication underground lines. It is published by the Institute of Electrical and Electronics Engineers (IEEE). "National Electrical Safety Code" and "NESC" are registered trademarks of the IEEE. The NESC should not be confused with the National Electrical Code (NEC) published by the National Fire Protection Association (NFPA). The NEC is used for residential, commercial, and industrial building wiring.

General

Access to the NESC

The NESC is written as a voluntary standard. It is typically adopted as law by individual states or other governmental authorities. To determine the legal status of the NESC, the state public service commission, public utility commission, or other governmental authority should be contacted. The majority of the states in the United States adopt the NESC in some form or fashion. The state of California is an exception. The state of California writes their own utility codes titled General Order 95 (GO95) for overhead lines and General Order 128 (GO128) for underground lines. The current edition of the NESC (2017) is available as a spiral bound book containing approximately 345 pages. The NESC codebook can be purchased online from the publisher, fro
IEEE
or at various third party websites. The 2023 edition of the NESC codebook, handbook and course program will be available in August 2022 and can be preordered beginning in May 2022.

Format of the NESC

The NESC is written by various sub committees. The organizations represented, subcommittees, and committee members are listed in the front of the code book. The NESC contains the procedure and time schedule for revising the NESC, which are described in the back of the code book. The NESC has an interpretation committee that issues formal interpretations. The process for obtaining a formal interpretation is outlined in the front of the code book. The NESC is currently published on a 5-year cycle. Urgent safety matters that require a change in between code editions are handled through a Tentative Interim Amendment (TIA) process. Original work on the NESC began in 1913.

The NESC is structured into parts, sections, and rules. There are general sections at the beginning of the book covering the introduction, definitions, references, and grounding. Following the general section are four main parts including: substations rules (Part 1), overhead line rules (Part 2), underground line rules (Part 3), and work rules (Part 4).

NESC Handbooks and Other Resources

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* The 202
NESC Handbook
represents a next-generation tool for the professional who needs to understand the NESC. The handbook was developed for use at many levels in the electric and communication industries, including those involved in system design, construction, maintenance, inspection, standards development and worker training. This step-by-step guide explains how to apply and meet the NESC rules for electrical supply stations and equipment, as well as overhead and underground electric supply and communications lines.
* Th
2023 NESC Course Program
is a series of online courses that take an in-depth look at the rules, regulations, and changes made in the 2023 NESC Edition. Taught by industry leaders who helped write the standard, these courses provide essential training for safeguarding power utility facilities and the people around them. Available through the IEEE Xplore digital library and th
IEEE Learning Network

Links

* Institute of Electrical and Electronics Engineers
* IEEE Standards Association

References

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Electrical engineering
Electrical safety
Safety codes