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.
 White conductors 
in cable assemblies


For many years, the mystery of area classification has resided with a select group of experts within the electrical, petrochemical and industrial sectors. Many electricians, electrical engineers, fire inspectors and electrical inspectors have remained outside of this group.

In the 2017 National Electrical code (NEC), there are a few changes in 110.26. The first change is in subsection (A), which is part of a global change for the upper voltage threshold.

Before we proceed, in part 3 of this series, the change in Section 230.70(A)(4) dealing with service disconnects on one- and two-family dwellings was reversed during the late stages of the development process and never made it into the 2017 National Electrical Code (NEC).

More on Codes & Standards

 
Paralleling Cable, Compressor Motor Protection and More

Article 110—Requirements for Electrical Installations; Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 250—Grounding and Bonding; Article 310—Conductors for General Wiring; Article 334—Non-Metallic Sheathed Cable: Type NM, NMC, and NMS; Article 406—Receptacles, Cord Connecto


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Security for Facilities

With all that has been happening in the past few years, homeland security has become one of the most important aspects of our lives.


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Purged and Pressurized Systems

This is a continuation of my last column, which was about the different types of purged and pressurized systems used in modern control rooms.


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Blast from the Past

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


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Portable Swimming Pools, Outdoor Cable and More

Article 100—Definitions; Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS; Article 404—Switches; Article 517—Health Care Facilities; Article 680 Swimming Pools, Fountains, and Similar Installations; Article 700—Emergency S


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