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. 

The term “qualified person” has a very broad meaning in a general context. From a simple standpoint, outside of the codes and standards world, it might mean having the qualities, accomplishments, etc., that fit a person for some function, office, or the like.

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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Littelfuse Shock-Block Class C and D GFCI

I recently taught a 2014 National Electrical Code (NEC) class at an industrial facility in Fort Wayne, Ind., where an attendee asked about special-purpose ground fault circuit interrupters (GFCIs) with trip levels above the normal 4­–6 milliampere (mA) trip threshold level.

There have been countless changes, both in the electrical industry and in the National Electrical Code (NEC), since the first edition in 1897. While a lot has changed, the reason and purpose of the Code have remained constant.

Electrical Contractor

More on Codes & Standards

 
Panelboards in Stairways, Color Coding and More

Control-circuit transformers Q: Do the requirements of Article 450—Transformers and Transformer Vaults or Article 725—Class 1, Class 2 and Class 3 Remote-Control, Signaling, and Power-Limited Circuits apply to a control-circuit transformers in a 480-volt combination motor starter?

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Pull- and Junction-Box Calculations, Part III

314.28 Pull and Junction Boxes Requirements pertaining to the installation and use of all boxes and conduit bodies used as outlet, device, junction or pull boxes are in Article 314 of the National Electrical Code.

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CSI MasterFormat 2004 Part II

Most electrical contractors are so busy making the payroll and payables each week, they don’t pay much attention to changes coming their way until they are hit in the wallet.

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Pull- and Junction-Box Calculations, Part II

314.28 Pull and Junction Boxes The National Electrical Code (NEC) has specific requirements detailing how to calculate the maximum numbers of conductors in boxes (outlet, device, junction, pull, etc.) and conduit bodies.

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Utility-Interactive PV Systems

A utility-interactive photovoltaic (PV) system is defined in Section 690.2 of the National Electrical Code (NEC) (NFPA 70-2005) as a “photovoltaic system that operates in parallel with and may deliver power to an electrical production and distribution network.” NEC Article 690 covers Solar Photovol

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When to Supplement

A new definition covering supplementary overcurrent-protective devices has been added to Article 100 in the 2005 National Electrical Code (NEC) to indicate that limited protection may be provided for specific applications or utilization equipment.

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Connecting Kitchen Hood Fans, Indoor Receptacles, and More

Laundry GFCI receptacles Q: Are all 15- and 20-ampere, 125V receptacles installed within six feet of a laundry or utility sink in a dwelling occupancy required to be protected by a ground fault circuit interrupter even where the receptacle is not readily accessible such as behind a clothes washer o

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