Electrical Contractor Magazine

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. 

Article 240, in the National Electrical Code (NEC), provides general requirements for overcurrent protection and overcurrent protective devices.

For many years, Article 250, which covers grounding and bonding in the National Electrical Code (NEC), only contained two tables. Table 250.122 was used for sizing the equipment grounding conductors, based on the size of the overcurrent protective device in the circuit.

Energy management is becoming commonplace in today’s electrical infrastructures through the control of utilization equipment, energy storage and power production. Yet, limited consideration is found in electrical installation standards to actively manage these systems.

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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More on Codes & Standards

 
Electrical Installation Requirements, Overcurrent Protection, Grounding, and Transformers and Their Vaults
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 240—Overcurrent Protection Article 250—Grounding Article 450—Transformers and Transformer Vaults Working space around electrical equipment

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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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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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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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Grounding in Patient Care Areas, Overcurrent Protection for Motors, and More
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 210—Branch Circuits Article 250—Grounding Article 430—Motors, Motor Circuits, and Controllers Article 517—Health Care Facilities

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Installing Cable TV in a Nursing Home Facility
by Staff |

As the Baby Boomers of our society reach their golden years, the need for more and more nursing home facilities will become imperative. Electrical contractors will be faced with the responsibility of properly installing many different sophisticated systems within these nursing homes.

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