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. 

An equipment grounding conductor (EGC) installed with a branch circuit or feeder circuit performs three important functions in the electrical safety system. EGCs provide a path that connects equipment to ground, thereby performing grounding functions.

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 2017 NEC.
 Parallel equipment 
grounding conductors


The last section in Part II of Article 110 in the National Electrical Code (NEC) covers enclosure types. The section for enclosure types has not always been 110.28. Enclosure types has only been 110.28 since the 2011 edition of the NEC.

In the past two National Electrical Code (NEC) cycles, there have been substantial changes in Article 517 dealing with healthcare facilities.

More on Codes & Standards

 
Installation of Electric Motors and Controllers

This is the third article of the series reviewing the most popular questions that have appeared in NECA’s online Code Question of the Day and have generated the most comments from subscribers. All answers have been updated to comply with the 2008 National Electrical Code (NEC).


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Do Not Expose

Many installations have exposed raceways and electrical equipment of all kinds on rooftops, walls and other direct sunlight applications, since this has been a common installation method for many years.


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Round Up or Round Down

When instructing workshops for electricians, I have found that some of the participants get very confused about how the National Electrical Code (NEC) addresses the rounding up or rounding down of the size of an overcurrent protection device (OCPD) to allow a motor to start and accelerate its drive


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The Sounds of Crisis

For many years, the audibility and intelligibility of fire alarm signals were ignored. Traditionally, a contractor or designer would put one audible/visible appliance above each manual fire alarm box (pull station) and maybe one or two more in the hallway.


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No Way Out

I have found while teaching the 2008 National Electrical Code (NEC) that the electrical industry has mixed feelings concerning the changes that pertain to the installation of receptacles.


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Overcurrent Protection, Tamper-Resistant Receptacles and More

Article 210 Branch Circuits; Article 220 Branch Circuit, Feeder, and Service Calculations; Article 240 Overcurrent Protection; Article 250 Grounding and Bonding; Article 330 Metal-Clad Cable: Type MC; Article 422 Appliances; Article 450 Transformer and Transformer Vaults (Including Secondary Ties)


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