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.
 Kitchen countertop receptacle height


Many of the articles I write for ELECTRICAL CONTRACTOR originate as questions from people who read my columns or attend my workshops.

Article 210 in the National Electrical Code (NEC) covers branch circuits, with the exception of circuits that supply motor loads only. Article 430 covers these branch circuits, and Part II covers motor-circuit conductors.

A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas.

More on Codes & Standards

 
Wiring in Ducts, Plenums, and Other Air-handling Spaces
by Staff |

Navigating the requirements in the National Electrical Code (NEC) for ducts, plenums, and other air-handling spaces can be difficult.

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Testing and Maintaining Life Safety Systems
by Staff |

Most electrical contracting firms are involved in installing life safety systems for new building construction and the renovation and expansion of existing buildings, but not in the ongoing system inspection, testing, maintenance, and upgrade.

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The Code In Focus--Article 210 - Branch Circuits
by Staff |

210-5 Identification for Branch Circuits

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Code Changes Require Technical Substantiation
by Staff |

Sometimes a code change is made with no supporting comment—no technical support —other than “we have been doing it this way for years and have had no trouble.” Section 4-3.3(d) of the NFPA Requirements Governing Committee Projects requires that substantiation be provided for each proposal.

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Conduits Entering the Bottom of a Switchboard, Connecting Electric Drive Fire Pumps, and More
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 240—Overcurrent Protection Article 250—Grounding Article 300—Wiring Methods Article 384—Switchboards and Panelboards Article 422—Appliances

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Structured Wiring Systems - A New Concept or a Reincarnation?
by Staff |

Recently, a new term has evolved to describe an integration of all low-voltage systems, such as TV, radio, telephone, and Internet/computer interlinks from one main distribution hub to serve all rooms within a building with multifunction communications capability.

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Article 210 - Branch Circuits
by Staff |

210-4 Multiwire Branch Circuits

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