Codes & Standards

 

Essential to the work of the electrical contractor is knowledge of the National Electrical Code, the National Electrical Installation Standards and additional standards and codes administered by the National Fire Protection Association, the Occupational Safety and Health Administration and others. Here is a list of all our articles on codes and standards listed chronologically by issue date. 

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to codefaqs@gmail.com. Answers are based on the 2014 NEC.
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I recently was asked to review a series of emails from a colleague about equipment requirements for ready access or, as defined in Article 100 and used within text in the National Electrical Code (NEC), as “readily accessible.” This phrase is used to describe the location of circuit breakers, for ex

What does the National Electrical Code (NEC) require when installing isolated/insulated grounding-type receptacles and auxiliary grounding electrodes?

Most of Article 240 in the National Electrical Code (NEC) provides general requirements for overcurrent protection and overcurrent protective devices not more than 1,000 volts (V), nominal. As a general rule, the overcurrent device rating shall not exceed the ampacity of a conductor.

More on Codes & Standards

 
Safely Installing Electrical and Service Panels in Residential Closets
by Staff |

This month’s column addresses controversial issues that have come up in NECA’s online “Code Question of the Day.” The author gives his opinion in his answers and invites your comments on the material discussed. Please e-mail your comments to brooke@necanet.org.

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Branch Circuits, Overcurrent Protection, Grounding, and More
by Staff |

CODE CITATIONS: Article 100—Definitions; Article 210—Branch Circuits; Article 230—Services; Article 240—Overcurrent Protection; Article 250—Grounding; Article 347—Rigid Nonmetallic Conduit; Article 430—Motors, Motor Circuits, and Controllers; and Article 702—Optional Standby Systems

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The Differences between GFCI, IDCI, and GFPE
by Staff |

The most important thing to understand about ground fault protection devices is that one type is to protect personnel and the other is to protect electrical equipment, the latter having different trip levels for different types of protection.

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Grounding Separately Derived Systems: Part 1 - The Basics
by Staff |

A common task for electrical system designers is to design separately derived systems. It is difficult to imagine a building that does not contain a separately derived system.

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Why Does the Code Mention Design E Motors If No One Makes Them?
by Staff |

My business is to conduct seminars on the National Electrical Code (NEC), grounding and bonding, and electrical safety. Even before it went into effect, questions arose in the seminars about coverage of Design E motors in the 1996 NEC.

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Grounding Electrode Connections, Bonding around Swimming Pools, Sizing the Neutral Conductor, and More
by Staff |

CODE CITATIONS Article 250—Grounding; Article 310—Conductors for General Wiring; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 501—Class I Locations; and Article 680—Swimming Pools, Fountains, and Similar Installations Grounding electrode connections

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