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. 

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.
 Type SE cable support


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.

Electrical Contractor Magazine

More on Codes & Standards

 
Conduit Fill and Amapacity Calculations for Low-voltage Systems
by Staff |

Where installing Class 2 or Class 3 remote control, signaling, or power limited circuits in a raceway or where installing power-limited fire alarm circuits in a raceway, is it necessary to figure conduit fill?

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Up in the Air Over Mounting Transformers
by Staff |

A proposed location for a 112-kVa 480Y/277 dry transformer suspended above the working space for a switchboard raises several questions.

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Dedicated Space
by Staff |

Relocating the requirements for dedicated space below and above switchboards, panelboards, and motor control centers from Sec. 384-4 to Sec. 110-26 (110-16 in the '96 NEC logically combines these requirements with their related working space.

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Code Questions and Answers
by Staff |

Code Citations Article 225-Outside Branch Circuits and Feeders; Article 240-Overcurrent Protection; Article 250-Grounding; Article 400-Flexible Cords and Cables; Article 430-Motors, Motor Circuits, and Controllers; Article 445-Generators; Article 450-Transformers and Transformer Vaults.

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CODE QUESTION OF THE MONTH
by Staff |

With this issue of Electrical Contractor, we're pleased to introduce a new monthly column.

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Separating Voice/data from Power Conductors
by Staff |

The National Electrical Code (NEC), Class 2 and Class 3 covers remote-control, signaling, and power-limited circuits covered by Chapter 7 in Article 725. They are considered to be a special condition other than a normal power circuit.

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Wiring Fluorescent Fixtures, Equipment Grounding Conductors, and Service
by Staff |

CODE CITATIONS: Article 225-Outside Branch Circuits and Feeders; Article 230-Services; Article 250-Grounding; Article 400-Flexible Cords and Cables; Article 410-Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 422-Appliances. Wiring Fluorescent Fixtures

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