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. 

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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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The model building code treats campus dormitories as residential occupancies. However, a dorm does not function the same as a commercial apartment building. In some cases, the architect has created a physical design to accommodate as many students as possible.

Are multiwire branch circuits becoming antiquated for most new installations, or are they still being used in most circuit applications?

The National Electrical Code (NEC) is divided into an introduction and nine chapters with 10 informational annexes. As specified in 90.5(D), the informative annexes are not part of the NEC’s enforceable requirements but are included for informational purposes only.

Electrical Contractor

More on Codes & Standards

 
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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Improperly Sized Conduit Bodies Can Lead to Conductor Damage
by Staff |

The requirements for the construction and installation of conduit bodies are mixed with those for boxes and fittings in Article 370 of the National Electrical Code (NEC).

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Enforcing and Administering the NEC
by Staff |

The National Electrical Code (NEC) enjoys the reputation of being the most widely accepted standard in the world. The document is intended to provide for the practical safeguarding of persons and property from hazards associated with electrical installations.

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Surpassing Standard Overload Protection
by Staff |

"What is the full load current of that motor over there?” “Which current rating do you want? Each motor has three current ratings: nameplate, NEC Table, and locked rotor.”

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