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

 
Temperature Limitations of Connections Must Not Be Exceeded
by Staff |

The temperature rating associated with the ampacity of a conductor must be selected and coordinated so that the lowest temperature rating of any conductor, equipment termination, or electrical device is not exceeded.

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Installing Transformers in Special Situations
by Staff |

The column this month will cover questions about transformer installations that were the subject of concern to subscribers to NECA’s on-line “Code Question of the Day.” All answers are based on the current 1999 edition of the National Electrical Code (NEC); however, beginning with this month’s colum

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Article 370 - Pull and Junction Boxes
by Staff |

370-28 Pull and Junction Boxes

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Branch Circuit, Feeder, and Service Calculations; Overcurrent Protection; Grounding; IT Equipment; and Water-intensive Installations
by Staff |

CODE CITATIONS Article 210—Branch Circuits; Article 220—Branch-Circuit, Feeder, and Service Calculations; Article 240—Overcurrent Protection; Article 250—Grounding; Article 645—Information Technology Equipment; and Article 680—Swimming Pools, Fountains, and Similar Installations

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Understanding Snap Switch Installation Requirements
by Staff |

Switching devices are often installed without reading installation instructions or without understanding certain concepts involved in the safe installation of these devices.

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Grounding Separately Derived Systems
by Staff |

Last month, we reviewed the basic requirements for grounding separately derived systems in accordance with Article 250 of the National Electrical Code (NEC). This month, we will explore a proposed 2002 Code change and how it might impact safety. 2002 NEC proposal

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Outlet Accessibility, Grommet Specs Changed in 1999 Code
by Staff |

Herewith are a few 1999 National Electrical Code (NEC) changes you may have overlooked. In Sec. 210-52(b)(1) Exception No.

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