Published exclusively by ieee and updated every 5 years to keep the code up to date with changes in the industry and technology the national electrical safety code r nesc r sets the ground rules and guidelines for practical safeguarding of utility workers and the public during the installation operation and maintenance of electric supply communication lines and associated equipment. The national electrical safety code 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 national electrical safety code and nesc are registered trademarks of the ieee the nesc should not be confused with. The national electrical code nec or nfpa 70 is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the united statesit is part of the national fire code series published by the national fire protection association nfpa a private trade association despite the use of the term national it is not a federal law. 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