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. 

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.

Advances in medical technology have resulted in more medical appliances and equipment being used in general-care and critical-care patient bed locations. The governing body of the healthcare facility typically determines the level of care in a given area.

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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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Electrical Contractor

More on Codes & Standards

 
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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Article 370-Boxes, Conduit Bodies and Fittings
by Staff |

An enclosure that contains a device(s), or supports a fixture(s) or other equipment can be supported by the entering raceways when all of the following conditions are met: 1) the enclosure does not exceed 100 cubic inches in size; 2) the enclosure has threaded entries or hubs identified for the purp

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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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