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.
 Grounding electrode
conductor termination


The first National Electrical Code (NEC) was developed in 1897. The National Fire Protection Association (NFPA) became the developer and publisher of the National Electrical Code (NEC) in 1911, and the NFPA continues to develop and publish the Code today.

New text in section 424.66(A) of the 2014 National Electrical Code (NEC) covers working space for electrical enclosures of resistance heating-element-type duct heaters mounted on air-duct systems in limited-access areas.

For many years, The National Electrical Code (NEC) has provided rules for equipment disconnects. NEC requirements are very specific for motors and motor-driven machinery, but they differ from lockout/tagout rules in NFPA 70E, Standard for Electrical Safety in the Workplace. The reason is simple.

More on Codes & Standards

 
Installing Outlet Boxes with Lighting Fixtures

Call me old-fashioned, but I have long held the opinion that, in a dwelling unit, an outlet box must be installed wherever a lighting fixture is to be installed.

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Electrical Installation Requirements, Conductors for General Wiring, Flexible Cords and Cables, Appliances, and Fire Pumps

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 230—Services Article 310—Conductors for General Wiring Article 400—Flexible Cords and Cables Article 422—Appliances Article 695—Fire Pumps

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Temperature Limitations of Connections Must Not Be Exceeded

The temperature rating associated with the ampacity of a conductor must be selected and coordinated so that the lowest temperature rating of any conductor, equipment termination, or electrical device is not exceeded.

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Understanding Snap Switch Installation Requirements

Switching devices are often installed without reading installation instructions or without understanding certain concepts involved in the safe installation of these devices.

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Grounding Separately Derived Systems

Last month, we reviewed the basic requirements for grounding separately derived systems in accordance with Article 250 of the National Electrical Code (NEC). This month, we will explore a proposed 2002 Code change and how it might impact safety. 2002 NEC proposal

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Outlet Accessibility, Grommet Specs Changed in 1999 Code

Herewith are a few 1999 National Electrical Code (NEC) changes you may have overlooked. In Sec. 210-52(b)(1) Exception No.

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