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 National Electrical Code (NEC) has contained multiwire branch-­circuit color coding since the early 1950s. However, it wasn’t until the 2005 NEC that it required the voltage system to identify ungrounded conductors where a building had more than one voltage system.

The stated purpose of the National Electrical Code (NEC) is the practical safeguarding of people and property from hazards arising from electricity use. One way to help do this is to ensure there is enough room around electrical equipment.


This article reviews changes in Chapter 3, Wiring and Methods and Materials, and Chapter 4, Equipment for General Use, in the 2017 edition of the National Electrical Code (NEC).
 336.10 Uses Permitted


What is a knife switch?


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.
 What is a knife switch?


More on Codes & Standards

 
General Installation Requirements, Part XIX

Section 110.26 of the National Electrical Code (NEC) requires specific minimums for working space around electrical equipment. Section 110.26 is divided into six subsections, and some of them contain even more subsections.



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2017 NEC: Introducing The New Code

Every three years, the National Electrical Code (NEC) is revised and often expanded. As the 2017 NEC development cycle comes to a close, the final stages of the process unfold.


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Expansion Requirements, Physical Damage Potential 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.
 Electrical systems expansion



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Digital Tools Ease Compliance

Historically, the National Electrical Code (NEC) has required much of the electrical equipment, wiring methods and other electrical parts used in the electrical industry to be listed.


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Keeping Your Distance, Termination Issues 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.
 Communications cable and 300.4(E)



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General Installation Requirements, Part XVIII

Understanding the third article of the National Electrical Code (NEC), Article 110, Requirements for Electrical Installations, is essential to having a Code-compliant installation of the electrical system. 



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The Ins And Outs Of Safety

In March, I attended a Central Arizona Chapter International Association of Electrical Inspectors (IAEI) meeting. A discussion ensued about the growing number of improperly installed and uncertified light-emitting diode (LED) retrofit lighting kits.


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