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

 
Grounded Conductor ID, Outside Branch Circuits and Feeders, Services, Lighting Fixtures, and More
by Staff |

CODE CITATIONS Article 200—Use and Indentification of Grounded Conductors; Article 225—Outside Branch Circuits and Feeders; Article 230—Services; Article 250—Grounding; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles;

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Splices and Conductor Fill in Enclosures and Wireways
by Staff |

The conductor fill requirements for a conduit or an outlet box are calculated in the field on a regular basis.

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NEC and OSHA Add to Confusion about GFCIs
by Staff |

Ground fault circuit interrupters (GFCIs) have been around since the early 60s, yet there is much confusion about their use and how they operate.

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Defining Effective Grounding in Article 250
by Staff |

In the 1999 National Electrical Code (NEC), and particularly in Article 250, the words "effective" and "effectively" are frequently used in relation to grounding and bonding.

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To Ground or Not to Ground-That Is the Question
by Staff |

If there is one common thread throughout the electrical industry, it seems to be centered on grounding and bonding. Article 250 provides many of the requirements for grounding and bonding but is still difficult to understand.

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CODE Q &A
by Staff |

CODE CITATIONS: Article 100-Definitions; Article 110-Requirements for Electrical Installations; Article 210-Branch Circuits; Article 220-Branch-Circuit, Feeder, and Service Calculations; Article 373-Cabinets, Cutout Boxes, and Meter Socket Enclosures; Article 400-Flexible Cords and Cables; Article 4

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