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.
 Supporting Type MC cable


In the past few months, I have received emails and phone calls from electrical inspectors and contractors stating there is confusion in their areas concerning swimming pool equipotential bonding. They requested that I clarify the bonding requirements for swimming pools.

Thanks to the work of numerous dedicated individuals, there is a 2017 edition of the National Electrical Code (NEC). This 54th version has been available since August. These days, the Code is revised every three years, but the revision cycle has ranged from one to four years.


This article reviews changes in Chapter 4, Equipment for General Use, in the 2017 edition of the National Electrical Code (NEC).
 422.16(B)(2) Built-in Dishwashers and Trash Compactors


More on Codes & Standards

 
Being Safe and Doing it Right

After addressing the lighting and exterior area of the premises last month, this month’s article concentrates primarily on internal security of the building, using Article 708 covering critical operations power systems (COPS) in the 2008 National Electrical Code (NEC).


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Try This on for Size

The 2008 National Electrical Code (NEC) has been revised by declaring the appropriate procedure for calculating the load to size the neutral conductor. There has always been a controversy between designers on the application of the NEC concerning this calculation.


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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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