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 2017 NEC.
 NFPA 70E and the NEC


Having adequate working space around electrical equipment is essential. Article 110 in the National Electrical Code (NEC) contains requirements for this access. Part II in Article 110 pertains to systems rated 1,000 volts (V), nominal, or less.

Anyone who has attended a conference in a hotel or other meeting space knows there can be a lack of receptacles to provide power for portable equipment. Sometimes, extension cords or relocatable power taps are plugged into wall receptacles and daisy-chained together to provide power to tables.

This is the final part in a series that reviews some of the more significant revisions and new requirements included in the 2017 National Electrical Code (NEC). This article looks at more rule changes for special equipment covered in NEC chapters 7 and 8.

More on Codes & Standards

 
Taping Devices, Installing Grounding Electrodes And More

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.
 Tape over device terminal screws?



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Not Your Average DC

Storage batteries are used for many different types of electrical equipment throughout the National Electrical Code (NEC). The phrase “storage batteries” occurs in 13 locations in the NEC index. In addition, Article 480 is devoted to the installation requirements for storage batteries.



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General Installation Requirements, Part XII

All of the first eight chapters in the National Electrical Code (NEC) contain at least five articles except one. Chapter 1, General, contains only two articles. The first, Article 100, contains definitions essential to the proper application of the NEC.


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Parallel Lives: EGCs for parallel runs


When incorporating larger feeders or branch circuits into equipment, many commercial and industrial electrical designs require use of parallel arrangements.


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Conductors On Rooftops, Power Button Markings And More

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.
 Conductors installed on rooftops 



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A Tricky Subject

The National Electrical Code (NEC) mentions cathodic protection only once; however, dealing with cathodic action and protection can be difficult to diagnose and time-consuming to fix.


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General Installation Requirements, Part XI

The National Electrical Code (NEC) is an installation code. As stated in the scope of Article 90, the NEC covers the installation of electrical conductors, equipment and raceways; signaling and communications conductors, equipment and raceways; and optical fiber cables and raceways [90.2(A)].


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