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. 

Point of supply


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.
 Point of supply


The model building code treats campus dormitories as residential occupancies. However, a dorm does not function the same as a commercial apartment building. In some cases, the architect has created a physical design to accommodate as many students as possible.

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.

Electrical Contractor Magazine

More on Codes & Standards

 
Getting Well-grounded in Grounding Systems

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

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Getting Well-grounded in Grounding Systems

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

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Article 210 - Branch Circuits

For tables, please see refer to Electrical Contractor magazine. 210.8(A) Dwelling Units

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Power Supply for a Fire Pump, Stranded Conductors on Receptacles, Kitchen Light Switches, and More

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 210—Branch Circuits Article 230—Services Article 250—Grounding Article 408—Switchboards and Panelboards Article 430—Motors, Motor Circuits, and Controllers Article 695—Fire Pumps

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2002 NEC Adds High-voltage Requirements

The electrical industry is rapidly changing. Utility companies are selling high-voltage equipment, including transformers and distribution equipment, to end-users as part of divestiture agreements.

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Article 210 - Branch Circuits

Please see January issue of Electrical Contracor for referenced figures. 210.8(A) Dwelling Units

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